s3-ap-southeast-2.amazonaws.com · web viewqldscale: 1:100,000location planaq_05163. qld. scale:...

78
AusQuest Limited ABN 35 091 542 451 Drummond Project EPM 12045 Partial Relinquishment Report For the Period ended 03/09/05 Galilee SF / 55-10 Queensland Author: Sally Lee, Graeme Drew Date: October, 2005 Copies to: Dept of Mines and Energy – Queensland

Upload: others

Post on 21-Aug-2021

1 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

AusQuest LimitedABN 35 091 542 451

Drummond Project

EPM 12045Partial Relinquishment Report For the Period ended 03/09/05

Galilee SF / 55-10Queensland

Author: Sally Lee, Graeme Drew

Date: October, 2005

Copies to: Dept of Mines and Energy – Queensland

Rio Tinto Exploration - Perth Information Centre

AusQuest Limited

AusQuest Report No.: 2005/16

Page 2: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Abstract

This is the report for the second partial relinquishment of tenement EPM 12045. This tenement forms part of the Drummond project which the company continues to explore.

Work completed over the life of the relinquished tenement area includes a review of past exploration, regional interpretation of geophysical and geological data.

The detailed review of all reported past exploration activity in the general region found limited historic work had been conducted over the project area.

Regional magnetics together with gravity and seismic data from west of the relinquished tenement were integrated with known geology to provide a regional study of the geology along the Beresford Ridge. Magnetic modeling was used extensively to define basement structures and identify potential trap sites within the Drummond Basin sediments for gold mineralisation.

Geophysical evaluation over the relinquished portion of EPM 12045 failed to reveal any potential for replacement style sediment hosted gold deposits and hence the area was recommended for relinquishment.

Page 3: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Table of Contents

Abstract........................................................................................................................page 2

List of Plans..................................................................................................................page 3

Conclusions...................................................................................................................page 4

Introduction..................................................................................................................page 4

Background and Rationale…........................................................................................page 5

Regional Geology..........................................................................................................page 5

Project Geology............................................................................................................page 6

Review of Previous Work…..........................................................................................page 6

Exploration Activity......................................................................................................page 7 Aeromagnetics Discussion

References....................................................................................................................page 8

Appendices

Appendix 1 Open File Exploration Review for the Drummond Project

List of Plans

Plan (05162) Project Location Plan…………..……….…………………...…Scale 1:1000,000

Plan (05163) Regional Geology, Tenement and Prospect Location Plan……...Scale 1:100,000

Plan (05164) Total Magnetic Intensity Image…………………..……………..Scale 1:100,000

Plan (05165) First Vertical Derivative Magnetic Image……………………….Scale 1:100,000

Page 4: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Conclusions

It is concluded that:

The Beresford Ridge is a significant regional scale structure representing large scale basement uplift west of and parallel to the Anakie Inlier which is a major controlling feature for epithermal gold mineralisation within the north east Drummond.

Lower Drummond Basin sediments should be preserved over the Beresford Ridge suggesting the basement high may be a buried equivalent of the Anakie Inlier with potential for sediment hosted mineralisation above the basement.

The lower Drummond Basin sediments are interpreted from seismic data to be shallow marine consisting of fine grained sediments, which may contain variable amounts of carbonate and/or carbonaceous material.

Major faults bound, and are internal to the Beresford Ridge structure providing potential fluid pathways through the sediments and trap sites for mineralisation.

Volcanic complexes concentrated within regional anticlinal closures along the main axis of the Ridge are considered prospective for gold exploration.

No volcanic complexes or major structural intersections are located within the relinquished sub-blocks downgrading their prospectivity for sediment hosted gold deposits.

Introduction

This is a partial relinquishment report for EPM 12045 which covers a portion of a major regional basement uplift (Beresford Ridge) within the central Drummond Basin as defined by Olgers (1972). Airborne magnetic data acquired by the Queensland Government in 1997 defined a number of potential volcanic intrusives coincident with the Beresford Ridge, which became the focus for exploration activity in the area aimed at locating replacement-style sediment-hosted gold mineralisation.

The relinquished portion of the tenement is located approximately 80 km west of Clermont with access to the project via the Clermont-Albro road (plan 05162).

EPM 12045 is the subject of Indigenous Land Use Agreement QLA2001/001 with the Kangoulu People which was placed on the National Native Title Register on 3 July 2001 and subject to a Farm/out Agreement with Rio Tinto Exploration Pty Ltd who retained a 70% claw back right.

EPM 12045 is part of the Drummond project for which combined annual reporting status was approved by the Queensland Department of Natural Resources and Mines on the 22nd May 2002.

During the life of the relinquished portion of the tenement, regional geological and geophysical data was compiled and reprocessed to provide an understanding of the exploration potential of the area. A search of all open file reports was also completed.

Page 5: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

BUCHANANBUCHANAN SF5506SF5506

MOUNMOUNTT COOLOCOOLONN SF5507

-22ºGGGAAALLLIIILLLEEEEEE SF5510SF5510

CCCLLLEEERRRMMMOOONNNTTT SSSFFF555555111111

-22º

EPM 12047

EFNPEFNP

AusQuest retained tenure

1st Partial Relinquishment

EPM 12045

2nd Partial RelinquishmentCLERMONT

-23º -23º

JERICHO SF551SF55144

EMERALDEMERALD SF551SF551 5

QLD

0 20 40

kilometers

Scale: 1:1,000,000 D

r

147º

147º

Page 6: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

u

m

m

o

n

d

P

r

o

j

e

c

t

T

e

n

e

m

e

n

t

L

o

c

a

t

i

o

n

Plan

showing relinquished tenements

AQ_05162

Page 7: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Background and Rationale

Modern day gold exploration within the Drummond Basin commenced in the early to mid 1980’s, buoyed along by discoveries at Pajingo (1983 Battle Mountain), Wirralie (1986 ACM), Yandan (1987 WMC) and Twin Hills (1987 Metana). Production from these deposits since that time has totalled ~40 tonnes gold with only the Pajingo (Vera Nancy) trend still in production.

These deposits were described as epithermal vein / breccia style deposits associated with intermediate to felsic volcanics formed during the initial rifting stages of the Drummond Basin development. All the deposits except Pajingo occur around the margin of the Anakie Inlier in areas of outcropping to subcropping Silver Hills volcanics and sediments.

Recent studies have shown several of the Drummond Basin deposits display strong stratigraphic controls on gold mineralisation with Yandan in particular now being described as a “replacement type deposit hosted by sediment of late Devonian age” (Ruxton & Seed). Recognition of this style of mineralisation suggested further sediment hosted deposits may be present in area, especially where favourable host rocks are preserved.

In the central Drummond Basin available seismic data suggest thick marine sediments of early to mid Devonian age are likely to be present in the lowermost Drummond Basin or underlying stratigraphy, providing a prospective sedimentary package for sediment hosted gold deposits. The data also suggest these sediments should occur at shallow depths over the Beresford Ridge, a 100 kilometre long basement high where uplift of several kilometres along major north-south structures is interpreted.

Aeromagnetic data released by the Queensland Geological Survey in 1997 provided further encouragement for the project with the recognition of several intrusive (volcanic) complexes localised within anticlinal structures along the strike of the Beresford Ridge. Similar magnetic intrusives (granodiorites) are known to occur in Nevada and help to define the world class Carlin Gold Trend.

Regional Geology

The Drummond Basin is believed to have formed in an extensional back – arc basin setting which developed in Central Queensland between the mid to late Devonian and the early Carboniferous. Initial sedimentation within the basin was associated with felsic to intermediate volcanism with minor igneous activity persisting throughout basin development. Sediments higher within the basin sequence are dominated by siltstone and sandstone containing minor amounts of organic and fossiliferous material.

Olgers (1972) subdivided the Drummond Basin fill into three cycles - Cycle 1 at the base which occurs in half graven &/or rift settings, consists of volcanics and volcaniclastics (Silver Hills Volcanics) interspersed with clastic sedimentary rocks, (mainly sandstones and conglomerates) and minor amounts of algal limestone and siltstone - Cycle 2 consisting mainly of fluvial and lacustrine sediments and –Cycle 3 which comprises dominantly quartzose and feldspathic fluvial sediments with an increasing component of volcanics marking the onset of renewed volcanic activity in the area.

Page 8: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

The end of basin deposition occurred in the Middle Carboniferous during the Kanimblan Orogeny, a major east-west compressional event that affected much of eastern Australia. This deformation produced local folding of the Drummond Basin sequence, reactivated basin- forming faults, and superimposed northwest-trending strike-slip faults on the basin. Basement was uplifted during this event along north-south, east-dipping thrust faults, including the area now exposed as the Anakie Inlier.

Regional gravity data show that two prominent gravity ridges occur within the western Drummond Basin. The eastern ridge is coincident with uplifted basement of the Anakie Inlier, whereas the western ridge (Beresford Ridge) occurs in an area where Cycle 2 and 3 sediments of the Drummond Basin are exposed. Seismic data suggest the Beresford Ridge represents basement uplifted into basal or pre-Drummond Basin sediments, forming a locus for structural preparation of basement and the overlying sediments that would have helped later entrapment of any gold-bearing fluids.

Seismic surveys over the Galilee basin west of the Beresford Ridge suggest thick marine sediments occur either at the base of the Drummond sequence or as pre Drummond sediments related to the neighbouring Adavale basin. The interpreted mid Devonian marine (carbonate ?) sequence can be traced via seismic section from west of the Lake Galilee No 1 drill hole, as far east as the Anakie Inlier where tentative stratigraphic correlations with pre Silver Hills Volcanic stratigraphy (Ukalunda beds) can be made. To date this sequence of rocks has not been intersected by drilling within the more central parts of the basin.

Plan 05163 shows the regional geology, tenement and prospect location plan.

Project Geology

The relinquished portion of EPM 12045 is dominantly covered by Quaternary and Tertiary sediments with only small outcrops of the Mt Hall Formation being mapped within the area. No obvious structures are evident in the geological data.

Based on the available regional gravity data the area appears to be close to the eastern margin of the Beresford gravity ridge.

Review of Previous Work

A review of all open file reports within the Drummond Project was undertaken by Jetmin Pty Ltd. A copy of their report is included in appendix 1.

Exploration in the general area of the Drummond Project can be divided into two phases:-

Uranium exploration during the period 1974 to 1980 – exploration generally focussed on outcropping Cycle 3 sediments of the Drummond Basin in the relinquished tenements. Exploration either targeted phosphatic horizons in the Ducabrook Formation or followed-up airborne radiometric anomalies. Several aeromagnetic and radiometric surveys were flown but the magnetics were largely ignored. No significant uranium mineralisation was discovered and most of the exploration effort is of little value to the current focus on gold.

Gold exploration during the period 1987 to 1989 - during this phase some of the current tenement area was covered by tenements owned by Burgundy Exploration Pty but apart from a

Page 9: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

QL Scale: Location

AQ_051

490000 mE 495000 mE 500000 mE

Relinquished EPM12045

Retained EPM12045

490000 mE 495000 mE 500000 mE

0 2 4

KilometersLascelles EPM12045

7515000 mN

7510000 mN

7505000 mN

7500000 mN

7495000 mN

7495

000

mN

7500

000

mN

7505

000

mN

7510

000

mN

7515

000

mN

Page 10: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

QL Scale: Location

AQ_051

Regional Geology and Tenement

Page 11: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

brief geological review, no work was carried out. Other explorers undertook limited stream sediment sampling programs or follow-up of aeromagnetic targets but only a few subtle targets were generated by this work, and none were effectively tested by drilling. With the Australia wide contraction in gold exploration, all the tenements had been relinquished by 1990.

From 1990 onwards the gold exploration focus shifted to the Drummond Basin sediments adjacent to the Anakie Inlier some 30 kilometres east of the tenements. No further title has been held over the Beresford Ridge since that time.

Based on the open file reports available, no significant exploration activity has been undertaken within the relinquished portion of EPM 12045.

Exploration Activity

Aeromagnetics

Magnetic data over the Drummond project were acquired from the Queensland Geological Survey who surveyed the area in 1997 as part of the Drummond – Galilee Basin survey. The survey was flown by Tesla Airborne Surveys using a line spacing of 400 metres, a mean terrain clearance of 80 metres and a flight direction of 070 degrees.

The located data were reprocessed by Southern Geoscience Consultants and a number of images produced to determine the most effective product for interpretation. Total Magnetic Intensity (TMI) and First Vertical Derivative (1VD) images shaded with a 50% NE gradient were subsequently produced and are presented with this report as plans 05164 and 05165 respectively. The airborne radiometric data was only briefly assessed.

Magnetic relief over the relinquished tenement area is generally relatively flat due to the non magnetic nature of the Drummond Basin sediments which form a thick cover (several thousand metres thick) over much of the area. Basement relief can be inferred from depth to magnetic basement calculations which indicate depths ranging from 2000 metres to 5000 metres throughout the general Lascelles area.

Minor magnetic relief within the more western relinquished sub-blocks suggests there may be Tertiary basalts in the area with some anomalies suggesting the presence of dyke like bodies trending in an ENE direction. These may also occur to the east where several ENE trending features are evident within the magnetic first vertical derivative map. The relinquished tenement is considered peripheral to the main interpreted volcanic complex that can be interpreted from the magnetic data.

Discussion

Interpretation of regional magnetic and gravity data has identified several volcanic complexes along the Beresford Ridge within structural settings (anticlinal closures) that are conducive to the formation of sediment hosted gold deposits provided suitable cap-rocks and reactive rocks could be found within the Drummond Basin sequence in this area.

Geophysical evaluation over the relinquished tenement area however, failed to find any targets of interest in this area, downgrading its potential.

Page 12: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

QL Scale:

AQ_051

490000 mE 495000 mE 500000 mE

Relinquished EPM12045

Retained EPM12045

490000 mE495000 mE 500000 mE

TMI NE Shade

0 2 4

KilometersLascelles EPM12045

7515000 mN

7510000 mN

7505000 mN

7500000 mN

7495000 mN

7495

000

mN

7500

000

mN

7505

000

mN

7510

000

mN

7515

000

mN

Page 13: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

QL Scale:

AQ_051

Total Magnetic Intensity Image

Page 14: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

QL Scale: Magnetic

AQ_051

490000 mE 495000 mE 500000 mE

Relinquished EPM12045

Retained EPM12045

490000 mE495000 mE 500000 mE

1VD

0 2 4

KilometersLascelles EPM12045

7515000 mN

7510000 mN

7505000 mN

7500000 mN

7495000 mN

7495

000

mN

7500

000

mN

7505

000

mN

7510

000

mN

7515

000

mN

Page 15: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

QL Scale: Magnetic

AQ_051

First Vertical Derivative

Page 16: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

References

Olgers F 1969 – The Geology of the Drummond Basin, Queensland. Bur. Miner. Resource. Aust. Rec. 1969/19 (unpubl.)

Harrison P, Anfiloff W, Moss F J 1971 – Galilee Basin Seismic and GravitySurvey, Queensland 1971

Draper J J 1999 - Exploration Potential of the Drummond Basin, Central Queensland: A Preliminary Reassessment Based on Seismic, Aeromagnetic and Geochemical Data. Queensland Government Mining Journal, January 1999.

Drew G J 2002 – EPM 12045, 12047, 13001 and 13044Combined Exploration Progress Report for the period ended 4/09/02

Drew G J 2003 - EPM 12045 Partial relinquishment Report For the Period ended 08/10/03

Etheridge Henley and Williams 1997 – Potential of the Drummond Basin to hostWorld Class deposits (unpublished)

Page 17: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Appendix 1

Open File Exploration Review for the Drummond Project

By Jetmin Pty Ltd

Page 18: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Jetmin Pty Limited Geoscience Consultants 12 Waterfront Easement Redland Bay QLD 4165 Phone (07) 3206 9228

Open File Exploration Review For The AusQuest Drummond Ridge Project.

Author: J. E. TerrillPrincipal Consultant Geologist

Date: January 2002

Client: AusQuest Limited

Representative: Graeme Drew

Submitted By: …………………………….John Terrill

Jetmin Tech Report No: 0531

Page 19: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

Table of Contents

List of Appendices...........................................................................................................2

List of Tables....................................................................................................................2

List of Figures..................................................................................................................2

1. Summary..................................................................................................................3

1.1 Exploration History...............................................................................................3

1.2 Drilling..................................................................................................................3

1.3 Recommendations.................................................................................................4

2. Introduction.............................................................................................................5

2.1 Project Background...............................................................................................5

2.3 Geology.................................................................................................................7

3. Previous Mineral Exploration................................................................................7

3.1 Agip Nuclear Australia Pty. Ltd. - 1974 to 1975..................................................8

3.2 BP Minerals Aust. Pty. Ltd.- 1976 to 1978...........................................................8

3.3 Silver Hills Joint Venture - 1977 to 1979..............................................................9

3.4 Getty Oil Development Company Limited - 1978 to 1979...................................9

3.5 Mobil Energy Minerals Australia Inc. - 1978 to 1981........................................10

3.6 Otter Exploration N.L. - 1979 to 1980................................................................10

3.7 Carpentaria Exploration Company Pty. Ltd. - 1979 to 1980...............................11

3.8 Pioneer Minerals Australia Limited - 1987 to 1988............................................11

3.9 ACM Gold Limited - 1988 to 1989.....................................................................11

3.10 Burgundy Exploration Pty. Ltd. - 1988 to 1989.................................................14

3.11 Homestake Australia Limited - 1988 to 1989.....................................................14

3.12 Exploration Since 1990.......................................................................................15

4. Previous Oil and Coal Exploration......................................................................15

5. References..............................................................................................................16

Page 20: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

2Open File Exploration Review – Ausquest’s Drummond Ridge

List of Appendices

Appendix 1 Exploration Summaries

List of Tables

Table 1 AusQuest’s Drummond Basin Project Tenements

Table 2 Summary of Past Mineral Exploration Tenement Holdings

List of FiguresFigure 1 AusQuest Drummond Basin Project – Tenements

Figure 2 Agip Nuclear Australia - 1974 to1975 - Tenements

Figure 3 BP Minerals Australia Limited - 1976 to 1978 - Tenements

Figure 4 Silver Hills Joint Venture – 1977 to 1979– Tenements

Figure 5 Getty Oil Development Company Limited - 1978 to 1979– Tenements

Figure 6 Mobil Energy Minerals Australia Inc. - 1978 to 1981 – Tenements

Figure 7 Otter Exploration N.L. - 1979 to 1980 – Tenements

Figure 8 Carpentaria Exploration Company Pty. Ltd. - 1979 to 1980 – Tenements

Figure 9 Pioneer Minerals Australia Limited - 1987 to 1988 – Tenements

Figure 10 ACM Gold Limited - 1988 to 1989 – Tenements

Figure 11 Burgundy Exploration Pty. Ltd. - 1988 to 1989 – Tenements

Figure 12 Homestake Australia Limited - 1988 to 1989 – Tenements

Figure 13 1990 to Present - Tenements

Page 21: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

3Open File Exploration Review – Ausquest’s Drummond Ridge

1. Summary

1.1 Exploration History

Exploration over and in the immediate environs of the AusQuest Drummond Ridge Project area of interest can be divided into two phases:-

Uranium exploration during the period 1974 to1980 – exploration generally focussed on Cycle 3 sediments of the Drummond Basin in the area around and south of the Star of Hope Syncline (i.e. the southern half of AusQuest’s area of interest). Exploration either targeted phosphatic horizons in the Ducabrook Formation or the follow-up of radiometric anomalies. Several aeromagnetic and radiometric surveys were flown but the magnetics were largely ignored. No significant uranium mineralisation was discovered and most of the exploration effort is of little value to the current focus on gold.

Gold exploration during the period 1987 to 1989 - during this phase much of the AusQuest area of interest was covered by tenements. Burgundy Exploration Pty held approximately half of these tenements, particularly those in the northern half of the AusQuest area of interest. Apart from a brief geological review, no work was carried out in the Burgundy tenements. The remaining explorers undertook limited programs comprising stream sediment sampling and follow-up of aeromagnetic targets or structural targets. A few valid, if subtle, targets were generated by this work, however, none were effectively tested by drilling. With the Australia wide contraction in gold exploration, all the tenements had been relinquished by 1990.

From 1990 exploration focus has shifted to the Drummond Basin sediments adjacent to the Anakie Inlier some 20 to 30km east of the AusQuest area of interest.

The northern AusQuest tenements (EPM12047 – Epping Forest, EPM13003 – Galilee One EPM12046 - Fiery Creek and EPM12234 - Fiery Creek 2) remain essentially unexplored, whilst the southern tenements have only been cursorily explored.

Little use has been made by previous explorers of the available aeromagnetic data to identify targets for further exploration.

1.2 Drilling

As far as can be established, no drillholes for the purpose of mineral exploration have been undertaken within the AusQuest area of interest. Drilling has been undertaken on only three projects of those reviewed in the vicinity of the AusQuest tenements:-

BP Minerals Aust. Pty. Ltd. (1976 – 1978) drilled 5 percussion and 3 diamond holes immediately to the south of the south eastern corner of EPM13002 GalileeThree targeting Uranium in the Ducabrook Formation, a best intersection of 300ppm U was recorded over 0.44m. No hydrothermal alteration was noted and no gold assays undertaken.

Page 22: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

4Open File Exploration Review – Ausquest’s Drummond Ridge

Mobil Energy Minerals Australia Inc. (1978 - 1981) drilled of 29 rotary/percussion holes for 2834m targeting Uranium in Drummond Basin sediments. The nearest hole to the AusQuest tenements is approximately 7km to the south of EPM13044 Galilee Four. MEMA concluded that their drilling intersected sediments of the eastern Galilee Basin rather than the targeted Drummond Basin sediments.

Homestake (1988 – 1989) drilled 32 RAB drill holes for 489m to test the low level gold anomalism in soils at three targets (Urella, Tumbarumba and Westlake Tank). These three targets lie immediately adjacent to AusQuest’s EPM13003 (Galilee One). Bedrock was not reached at any of the targets due to extensive cover and poor drilling conditions. No significantly anomalous gold values were returned from samples from the cover sequence. Overburden thickness of 30 meters minimum was indicated by the RAB drilling program.

1.3 Recommendations

Many waterbores are likely to occur within the AusQuest area of interest (Agip,1974 to 1975, sampled 38 water bores for hydrogeochemistry within the general area). No attempt has been made to locate or determine what data is available on these waterbores. It is unlikely that the records contain information of the quality and detail to be of any real assistance to the AusQuests Project and are unlikely to be of relevance to the current review. However, compilation of this data is recommended as it may supply some information on drilling conditions and depth of cover for the ongoing exploration program.

Compilation or acquisition of digital stream sediment data over the AusQuest area of interest and surrounds is recommended (contractors to the Department may have already compiled this data). Such a compilation may provide clues to possible structural controls on mineralisation and geochemical zonation not otherwise obvious from reviews of the various hardcopy company reports.

Summaries of results and recommendations on specific targets considered to warrant further work are detailed separately below, with targets located on Figure 1.

Lascelles Creek Magnetic Anomaly

ACM Gold Limited (1988 to 1989 - A to P 5039M) defined a coincident magnetic anomaly and soil auger gold anomaly. The magnetic anomaly was concluded to represent a multiple intrusion of small basic dykes into the Drummond sequence of sediments and tuffs. A cluster of 3 non- sequential samples recorded 7.2, 4.5 and 6.1 ppb Au in BLEG and up to 0.02ppm Au in -80#. This cluster of gold anomalism covers a strike length of at least 300m and remains open.

ACM had planned to drill the target and drill sites for 8 shallow percussion holes were prepared, however the holes were not drilled. The target remains valid, if subtle, and further work to better refine the target is recommended.

Page 23: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

5Open File Exploration Review – Ausquest’s Drummond Ridge

Recruit Area A

Pioneer Minerals Australia Limited (1987 to 1988) recorded 45ppb Au and 450ppm As in a –40# stream sediment sample from a small drainage within AusQuest’s EPM 13044 (Galilee Four). These results are strongly anomalous. This sample, however, is first in batch and may be the result of contamination. No follow-up of this anomaly was been undertaken, check sampling is recommended in the slim hope that the anomaly is “real”.

Urella, Tumbarumba and Westlake Tank Targets

Homestake Australia Limited – (1988 to 1989 - EPM 6932) defined 3 structural intersection targets with coincident weakly anomalous BLEG gold values. RAB drilling was conducted to test the low level gold anomalism at the three targets (Urella, Tumbarumba and Westlake Tank). Bedrock was not reached at any of the targets due to extensive cover and poor drilling conditions.

The source of elevated gold in soil remains unresolved, these three targets are all immediately adjacent to AusQuest’s EPM13003 (Galilee One). As with other targets in the area, drilling difficulties have resulted in the targets not being effectively tested.

Review of magnetics and structural data in this area is recommended to determine validity of these targets and implications for potential mineralisation within the AusQuest area of interest.

Eastern Creek Gold AnomalyACM Gold Limited (1988 to 1989 - A to P 5629M) recorded a stream sediment anomaly from a sample at the confluence of Eastern Creek (2.39ppb Au in BLEG and 0.34ppm Au in -80#). No follow-up sampling was done in the immediate vicinity of this sample and ACM concluded that the gold resulted from stream concentration of widely dispersed gold values within the Cainozoic quartz pebble/conglomerates, rather than indicating a local bedrock source. This area lies outside AusQuest tenements, review of magnetics and structural data is recommended in this area to determine if there is a possible local bedrock source for the anomaly.

2. Introduction

Much of the following is adapted directly from information supplied to the author by AusQuest:-

2.1 Project Background

AusQuest’s Drummond Ridge project, located in Central Queensland 120 kms north west of Clermont, was initiated by Rio Tinto Exploration Australia (RTE) in 1997. From interpretation of the available data AusQuest has inferred the

Page 24: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

6Open File Exploration Review – Ausquest’s Drummond Ridge

potential for a Carlin style Gold Trend with similarities to the major gold producing area in Nevada.

Table 1 summarises the tenements included in the Drummond Ridge Project.

Table 1.Tenement Number

Tenement Name Sub- blocks

Area

(Km²)

Application

Date

Grant Date

Expiry Date

EPM 12045 Lascelles 72 228 23/10/97 04/09/01 04/09/06

EPM 12046 Fiery Creek 7 22 23/10/97 25/05/98 25/05/01

EPM 12047 Epping Forrest 174 553 23/10/97 04/09/01 04/09/06

EPM 12234 Fiery Creek Two 5 16 05/05/98 04/09/01 04/09/06

EPM 13001 Galilee Two 172 545 17/04/00 04/09/01 04/09/06

EPM 13002 GalileeThree 64 203 17/04/00 04/09/01 04/09/06

EPM 13003 Galilee One 285 906 17/04/00 - -

EPM 13044 Galilee Four 200 633 18/05/00 04/09/01 04/09/06

Totals 979 3106

In May 2000 AusQuest negotiated rights to approximately 800 km² of title held under Exploration Permit application by RTE. In August RTE elected to have tenement applications covering a further 2300 km², submitted by AusQuest in April, included under the same agreement. The agreement provides RTE with a 70% claw-back right for an effective three times multiple of AusQuest expenditure, exercisable any time up to decision to mine.

The project is located 40 kms basinward (west) of the Anakie Ridge where structurally controlled epithermal and/or stratabound gold deposits at Twin Hills, Lone Sister, Yandan, Wirralie, and Pajingo occur within early stage Drummond Basin volcanics and sediments (Late Devonian to mid Carboniferous).

2.2 Exploration Concept

The concept of a “Carlin Trend” has very significant implications. The Carlin type deposits of Nevada are rated, in total gold content, second only to the Witwatersrand deposits of South Africa and are almost on a par with the Eastern Goldfields of Western Australia in terms of total contained gold and annualised District production (~250 tonnes Au p.a.). The Carlin Trend has been responsible for the making of several major companies, most notably Newmont and Barrick, and continues to spawn new discoveries.

The project area covers a regional north-south trending basement ridge where vertical movements in excess of 5 kms are evident in seismic data. This structure is a major feature on the 1:5,000,000 scale gravity map of Australia, and probably reflects a focal point for repeated crustal scale faulting (both extensional and compressional) in this region.

The presence of thick marine sediments (carbonates, siltstones, and shales? of mid Devonian age) coincident with the Ridge, is inferred from seismic data immediately north and west of the project area. If correct, this coincidence

Page 25: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

7Open File Exploration Review – Ausquest’s Drummond Ridge

suggests that an interplay of steep structures and thick marine sediments is likely, thus increasing the potential for trap site development and gold precipitation within the sediments, similar to the deposits found along the Carlin Trend. The inferred presence of hydrocarbons within the marine sequence (based on results from Lake Galilee No. 1 – Draper, 1999) provides a further positive comparison between the two regions.

Recently available aeromagnetic data over the Drummond Basin (Draper, 1999), outlined a 50 km zone along the Ridge where several magnetic intrusives (granodiorites/diorites?) are inferred to occur within regional anticlinal structures, providing further analogies with the Carlin area. Regional NE and NW cross cutting structures are also evident in the data.

Interpreted depths to intrusives range from 100 to 1000 metres indicating that prospective sedimentary packages (calcareous siltstones, carbonaceous silts and the like) could be preserved anywhere from just below surface cover, down to the intrusive contacts.

2.3 Geology

The eastern margin of the Drummond Basin is defined by the unconformable contact with the Anakie Metamorphics of the Anakie Inlier and the Upper Devonian – Late Carboniferous Silver Hills Volcanics. The Anakie Inlier lies some 40km east of AusQuests area of interest. To the west, Drummond Basin sediments disappear under cover of the Galilee Basin. They are known to continue many tens of kilometres to the north and west from oil exploration seismic data and drilling.

Olgers (1972) described the geology of the Drummond Basin and recognised three techno-sedimentary cycles separated by disconformities within the basin sequence. These include:

Cycle I – Upper Devonian – Late Carboniferous Volcanics (Silver Hills Volcanics) consisting of flow banded and spherulitic rhyolites, welded tuffs, crystal lithic tuffs, andesite, trachyte and minor sediments. These volcanogenic sediments are almost entirely terrestrial in origin.

Cycle II – Early Carboniferous phase of fluvial sedimentation lacking the volcanic component of Cycle I and includes the Telemon, Scartwater, Mount Hall and Raymond Formations

Cycle III – Early Carboniferous volcanogenic and sedimentary phase with volcanolithic sediments, tuffs and volcanics and includes the Star of Hope, Mount Rankin, Ducabrook, Bulliwallah and Natal Formations.

3. Previous Mineral Exploration.

There are no significant mineral occurrences in the AusQuest area of interest. Minor sediment hosted uranium and phosphorite occur in sandstone and siltstone units in the Mount Hall, Raymond, Star of Hope and Ducabrook Formations (Lam and Garrad, 1993).

Page 26: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

8Open File Exploration Review – Ausquest’s Drummond Ridge

Digital coverage of all previous mineral exploration tenements (A to Ps and EPMs) covering and surrounding the AusQuest area of interest were obtained from the Queensland Department of Natural Resources and Mines. This coverage was used to identify all past tenement holdings that may be relevant to AusQuest’s Drummond Ridge Project.

The Department’s QERI database was searched to determine corresponding company report numbers (CR Numbers) for these tenements. All reports thus identified on relevant previous mineral exploration have been reviewed and summarised, “Open File Report Summary Sheets” for all reviewed reports are attached in Appendix 1.

Table 2 is a summary of past tenement holdings grouped by company and ordered chronologically. Typically, individual companies (or joint ventures of companies) held several adjoining tenements that formed a cohesive project and were subjected to similar or integrated work programs. These company “projects” are summarised chronologically below with applicable tenement holdings shown on Figures 2 to 13.

Note: Around 1990 the Department change the tenement terminology from “Authority to Prospect” to “Exploration Permit Minerals” (e.g. A to P 5629M became EPM5629). Historic tenement numbers in the Departmental databases are referenced in the new terminology whilst report titles and text pre 1990 invariably use the old terminology. In this report both terminologies have been used interchangeably dependant on source and context of the information presented.

3.1 Agip Nuclear Australia Pty. Ltd. - 1974 to 1975Agip held one tenement in the Star of Hope Syncline area, see Figure 2, their target was uranium.

Exploration activities commenced with geological and radiometric ground traverses, followed up by an airborne radiometric and magnetic survey.

Ground follow-up of radiometric anomalies was then completed and photo- geological mapping commenced in the southern part of the tenement.

Exploration results were generally negative, only three airborne radiometric anomalies were located within the area. Two anomalies were followed-up with radioactivity less than 2 times adjoining rocks - anomalies were concluded to be due to change in lithologies.

Agip collected 38 samples from water bores (3 within the tenement). A number of high uranium results that were returned from the water bore samples were concluded to be partly due to high salinity and carbonate content.

3.2 BP Minerals Aust. Pty. Ltd.- 1976 to 1978

BP held one tenement to the south east of the Star of Hope Syncline, see Figure 3.

Exploration of uranium focused on the prospective Ducabrook Formation (in Cycle III), and specifically Unit (4), a grey brown arkosic sandstone with bands of algal and stromatolitic limestone and a redbed marker. The unit contains 3 to 4 radioactive sedimentary bands with radioactivity from 3 to 10 times background.

Page 27: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

9Open File Exploration Review – Ausquest’s Drummond Ridge

Up to 790ppm U3O8 and up to 19.7% P2O5 was recorded by rock sampling.

Only one of 5 open hole percussion drill holes reached the desired depth and penetrated the zone of interest, other holes were abandoned due to hard drilling or collapse of holes. No significant assays were recorded from the percussion drilling (maximum 65ppm U).

Subsequently, the target was tested with 3 diamond drill holes. Anomalous radioactivity and phosphate mineralisation was intersected down dip in the target intervals. However, no thickening, enrichment or economic mineralisation was intersected. A maximum U value of 300ppm was recorded over 0.44m.

It was recommended that no further work be carried out on the tenement and the tenement was subsequently relinquished.

3.3 Silver Hills Joint Venture - 1977 to 1979

Exploration was carried out in eleven EPMs held by the Silver Hills Joint Venture. Four of the tenements overlap or adjoin the AusQuest area of interest, whilst the total project holding extended some 75km south east of the AusQuest area of interest – see Figure 4.

The Silver Hills Joint Venture comprised A.O. (Australia) Pty. Ltd., Mines Administration Pty. Ltd. and Teton Exploration Drilling Co. Pty. Ltd. with A.O. (Australia) Pty. Ltd. as manager.

Anomalous radiometric values were recorded in the Lower Ducabrook Formation along the western flank of the Pebbly Creek Anticline.

Initial programs of reconnaissance, ground traversing and stream sediment and water sampling were augmented by geochemical and petrographic studies. A large scale (10,100 line km - 300m line spacing, 90m mtc) airborne gamma ray spectrometer (and magnetic) survey was flown covering much of the project area. A final phase of field investigations constituted ground scintillometer survey of promising aerial anomalies.

The field work revealed that the aerial anomalies resulted from the presence of anomalous amounts of uranium generally associated with, and increasing in direct proportion to, phosphate.

Due to the field observation that anomalous uranium-bearing beds were thin and the unlikelyhood of an increase in thickness down dip, the Joint Venture Partners concluded that sub-surface sampling (drilling?) would not be beneficial. Consequently all title in the area was relinquished.

No drilling was undertaken within the tenement areas and very little information of relevance to the AusQuest area of interest is presented.

3.4 Getty Oil Development Company Limited - 1978 to 1979

Getty held 4 contiguous tenements in an area of Cainozoic cover to the east of the AusQuest area of interest, see Figure 5. The tenements are probably targeting the Cycle III sediments (including Ducabrook Formation) of the Drummond Basin.

Page 28: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

Data is yet to be reviewed as no Company Reports could be found referenced to A to Ps 1962 and 1963, however, data may be incorporated in reports on A to P 1960,which is yet to be checked.

3.5 Mobil Energy Minerals Australia Inc. - 1978 to 1981

Mobil Energy Minerals Australia Inc. (MEMA) held 5 contiguous A to Ps in the South Drummond Basin, the most northerly of these tenements ( AtoP 2167M Narrien Creek) overlaps AusQuest’s EPM 13044 (Galilee Four), see Figure 6.

MEMA conducted a program of generally broad spaced drilling aimed at discovering uranium.

The program was designed to define stratigraphy, redox fronts and any uranium mineralisation that my be contained in the area of the Authorities. A total of 29 holes for 2834m were drilled. The nearest hole to the AusQuest tenements is approximately 7km to the south.

MEMA concluded that the area under tenement was in fact part of the eastern Galilee Basin rather than the target Drummond Basin sediments. MEMA concluded that potential for Uranium, coal and shale oil is low. This work has few implications for the AusQuest Drummond Ridge Project.

3.6 Otter Exploration N.L. - 1979 to 1980

Otter Exploration N.L. held one tenement in the southern half of the AusQuest area of interest (Figure 7).

A to P 2071 covers the western outcrop extremity of the Carboniferous Ducabrook Formation in the Drummond Basin. This formation has been described as the host for uranium mineralisation discovered by Aston MiningN.L. elsewhere. This uranium mineralisation is associated with a thin band of phosphatic sandstone occurring in the middle of the Ducabrook Formation

The following program was completed on the tenement:-

(a) Aerial photographic interpretation

(b) Geological traversing

(c) Vehicle and foot scintillometer traversing.

Ground scintillometer traversing resulted in the discovery of a zone of high background radioactivity, in slightly fossiliferous mudstones in the Ducabrook Formation. High point anomalies in this zone are associated with very localised ferruginous layers found at the base of the soil profile and narrow bands of massive siliceous mudstone. Geochemical asaays suggest that the uranium is an original constituent of the sediment associated with apatite.

A maximum assay of 180ppm U with 0.9% P2O5 was recorded by rock sampling.

The localised nature of the radiometric anomalies, poor uranium assay results and the association with phosphate indicated a low probability for the occurrence of an economic deposit of uranium. The tenement was consequently relinquished.

Page 29: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

3.7 Carpentaria Exploration Company Pty. Ltd. - 1979 to 1980

CEC held two tenements covering the Star of Hope Syncline in the southern half of the AusQuest area of interest (Figure 8).

Detailed literature study of the individual formations showed the Telemon, Mount Hall and Raymond Formations (Cycle II) to have a high priority for exploration for sandstone uranium. It was considered that the Mount Hall Formation described as a fluvial point bar and channel deposit, had the best potential for hosting uranium mineralisation.

A 1,720 line km airborne magnetic and radiometric survey was completed over the two tenements. Follow-up of airborne anomalies included ground radiometric traversing, soil and rock sampling and geological mapping.

A number of anomalous areas were evident in the data, anomalies are generally of a low order in the range of 2 to 2.5 times background. The anomalous areas fall consistently over outcropping Raymond Formation. A study of ratio data did not outline any significant anomalies. No major magnetic trends were obvious from aeromagnetic data.

Maximum "anomalies" obtained from ground radiometric traversing were up to twice background for various formations.

Rock and soil sample assays failed to return any significantly anomalous values.

Petrology for 8 rock samples from the Raymond and Mount Hall Formations indicated a reduced nature for the Raymond Formation samples which is attractive, however, low porosity and rarity of carbonaceous material is unattractive.

Results were not encouraging and the A to P was relinquished.

3.8 Pioneer Minerals Australia Limited - 1987 to 1988Pioneer (formerly Noranda Australia Limited) held 4 contiguous tenements centered on the Star of Hope Syncline in the southern half of the AusQuest area of interest, see Figure 9.

They conducted reconnaissance stream sediment sampling (heavy minerals, BLEG, –80# and some –40#) over most of the tenement area but failed to identify any areas of significant anomalism or any mineralisation.

One –40# sample from a small drainage recorded 45ppb Au and 450ppm As, which could be regarded as strongly anomalous (Recruit Area A on Figure 9). This sample, however, is first in batch and in all likelihood is the result of contamination. No follow-up of this anomaly was been undertaken, this warrants check sampling in the slim hope that the anomaly is “real”.

In light of disappointing results, all 4 tenements were relinquished.

3.9 ACM Gold Limited - 1988 to 1989

Three tenements held by Burgundy Exploration Pty Ltd were joint ventured with ACM to explore for gold in the Drummond sequence and possible intrusives indicated by the BMR aeromagnetics, see Figure 10.

Page 30: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

A to P 5039M

A helicopter supported BLEG stream sediment sampling program was completed, 119 samples were collected. Assays recorded peak values of 0.62ppb Au, 0.26ppm Cu and 12.8ppb Ag. No areas of quartz veining or obvious hydrothermal alteration were discovered in the course of the stream sediment sampling. It was concluded that no anomalies warranting follow up were detected.

60 line kilometers of ground magnetics were completed with the aim of producing drill targets in the northern part of the Authority where superficial cover reduced the effectiveness of stream sediment sampling. A magnetic anomaly apparently representing a multiple intrusion of small basic dykes into the Drummond sequence of sediments and tuffs was defined.

Six lines of auger soil samples were completed over the magnetic anomaly. Auger holes were completed to a maximum depth of 4m. Some “weakly elevated” gold and arsenic occurs coincident with the magnetic anomaly. Based on this correlation and in view of the Tertiary and Recent cover in the area, it was decided to test the anomaly by limited RC percussion drilling.

Drill sites for 8 shallow percussion holes were prepared, however due to rig unavailability drilling was postponed until November 1988. The Authority was relinquished in January 1989 apparently without the proposed holes being drilled.

The soil auger gold anomaly appears quite real with a cluster of 3 non- sequential samples recording 7.2, 4.5 and 6.1 ppb Au in BLEG and up to 0.02ppm Au in -80#. This cluster of gold anomalism covers a strike length of at least 300m and remains a valid, if subtle, target.

A to P 5279MA helicopter supported BLEG stream sediment sampling program was completed, 36 samples were collected and assayed for Au, Cu and Ag by BLEG. Elevated gold (to 0.56ppb) and silver (to 24.5ppb) values were recorded.

A "weak anomaly" was defined in the north-west quarter of the Authority for future soil sampling. A zone of elevated gold and silver running north south in the center of the Authority was attributed to a north striking geological unit and was apparently of no interest to the Authority holder.

3 rock samples were also collected, only one sample returned anomalous gold results (0.2ppm), this, however, was a dumped sample of quartz apparently from a vein in the basement Anakie Metamorphics 2km to the east of the A to P.

A low hill in the eastern block of the A to P contained outcrops of crystal lithic tuff mapped as Silver Hills Volcanics was apparently of interest but contained "no obvious quartz veining or hydrothermal alteration".

Page 31: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

27.5 line km of ground magnetics was undertaken in the eastern block of the A to P with the aim of detecting magnetic anomalies with potential to host similar style mineralisation as WMC's Mistake Creek Prospect. The ground magnetics appears to have provided little useful additional information and it was concluded that the magnetic high (in BMR aeromagnetics) is "likely caused by a deep basic intrusive related to the contact between the Silver Hills Volcanics and the underlying Anakie Metamorphics".

112 BLEG samples and 30 -80# soil samples were collected on a 500m spacing over the eastern block of the A to P. ACM concluded that the results were not worthy of further follow-up. Peak values were 2.69ppb Au and 67.2ppb Ag in BLEG samples; and 0.014ppm Au in -80# samples.

No further work was undertaken and the Authority was relinquished.

A to P 5629M

122 regional BLEG and -80# stream sediment samples were collected and assayed for Au, Cu and Ag (BLEG) and Au, Cu, Pb, Zn and As (- 80#). Several samples recorded BLEG gold anomalies (+1.0ppb) with one sample recording 2.39ppb Au in BLEG and 0.34ppm Au in -80# (at the confluence of Eastern Creek).

ACM Gold Limited collected 25 BLEG stream sediment samples to follow-up anomalous Au defined during the previous reporting period (CR20779). Most of these samples appear to have been collected outside the area of the Authority (e.g. headwaters of Eastern Creek). Assay results are generally of a low tenor and fail to highlight any area for further work. 3 rock samples were also collected, no significant assays were recorded. It appears that no follow-up samples were collected in the immediate vicinity of the peak anomaly recorded in the previous sampling near the confluence of Eastern Creek.

ACM collected 19 BLEG soil samples over a traverse on Hill 321 to follow-up stream sediment BLEG anomalies in drainages near this hill. A maximum value of 3.3ppb Au was returned. The hill is capped by Czg gravels and it was concluded that the gold is sourced from these gravels and is reworked from sources in the Anakie Metamorphics to the east.

ACM concluded that the gold obtained from BLEG in the streams are a result of present stream concentration of widely dispersed gold values within the Cainozoic quartz pebble/conglomerates, rather than indicating a local bedrock source.

Ground magnetics was completed over 3 magnetic anomalies selected from the BMR aeromagnetics to better define the anomalies. At Anomaly 2 a thin weak linear magnetic anomaly was defined. At Anomaly 3 a weak east-west trending anomaly probably representing a thin dyke was defined. At Anomaly 4 a discrete high with an associated low probably representing a small basic plug was defined.

Soil sampling was completed over the three magnetic anomalies, assay results are generally of a low tenor with peak BLEG gold of 3.24ppb.

Page 32: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

In light of disappointing results ACM withdrew from the JV and Burgundy Exploration Pty. Ltd. assumed the role of operator.

Burgundy undertook further study of aeromagnetic Anomaly 4, which shows a range approaching 7,000nT from peak to trough. Surface expression suggests that the anomaly is caused by a ultrabasic or basic pipe with a few boulders of dolerite/gabbro present. Field examination of panned concentrate of a bulk soil sample suggested the presence of magnetite, ?picro ilmenite, olivine, chromite, abundant chrome diopside, pyroxene and ?minor zircon. However, lab heavy mineral observations indicate that the plug is unlikely to be diamondiferous (due to low chrome chrome diopside and low Mg in picro ilmenites and pyropes). A possible zenolith from the pipe was determined to have a gabbroic composition from petrological examination.

Burgundy undertook reconnaissance sampling for zeolite in a thin zeolitic siltstone in the Ducabrook Siltstone was undertaken and AEC results for 18 samples are presented. It was concluded that grades were not high enough and that limited outcrop thicknesses also mitigate against exploitation and no further work was warranted.

No further work was undertaken and the Authority was relinquished.

3.10 Burgundy Exploration Pty. Ltd. - 1988 to 1989Burgundy held 7 irregular tenements covering much of the AusQuest area of interest, see Figure 11. All 7 tenements were subject to the same proposal for low level aeromagnetics, which was dependent on joint venture negotiations. The negotiations did not succeed and, apart from a brief geological review, no work was carried out in these tenements.

3.11 Homestake Australia Limited - 1988 to 1989Homestake held three contiguous tenements during 1988-89 in their Drummond Basin Project (see Figure 12). One of these tenements (Elgin, EPM 6932) adjoins and partly overlaps with AusQuest’s EPM13003 (Galilee One).Homestake were exploring for large open-pittable gold resources with emphasis on sediment-hosted epithermal and porphyry styles. Gold mineralisation was targeted in early Paleozoic fossil epithermal volcanic cells and Permo- Carboniferous porphyry related replacement deposits in sediments, is association with NW, NNW and NE trending structures.

Homestake delineated 7 structural intersection targets within EPM 6932 through compilation and interpretation of Landsat TM Imagery, aerial photography, aeromagnetics and gravity data. These targets were subjected to broad spaced BLEG soil sampling. Three targets returned anomalous values, which were confirmed by sub-sampling.

RAB drilling was conducted to test the low level gold anomalism at the three targets (Urella, Tumbarumba and Westlake Tank). Bedrock was not reached at any of the targets due to extensive cover and poor drilling conditions. No significantly anomalous gold values were returned from samples from the cover sequence.

Page 33: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

Overburden thickness of 30 meters minimum was indicated by the RAB drilling program.

Further testing was concluded to be too expensive and the tenement was relinquished.

The source of elevated gold in the BLEG soil samples at the Urella, Tumbarumba and Westlake Tank targets remains unresolved, these three targets are all immediately adjacent to AusQuest’s EPM13003 (Galilee One). As with other targets in the area, drilling difficulties have resulted in the targets not being effectively tested.

3.12 Exploration Since 1990.

No mineral exploration tenements were held over the AusQuest area of interest since 1990 and, apparently, no exploration undertaken. See Figure 13 for tenement coverage through this period. Exploration focused on the basal units of the Drummond Basin proximal to the Anakie Inlier some 20km to the east of AusQuest’s current holdings.

4. Previous Oil and Coal Exploration

Digital coverage of all previous oil and coal exploration tenements covering and surrounding the AusQuest area of interest were obtained from the Queensland Department of Natural Resources and Mines.

12 petroleum tenements (EPPs) have been held over AusQuests area of interest. Company reports were scanned for petroleum exploration directly relevant to the AusQuest Drummond Basin project. No drilling, seismic or over significant work has been undertaken over the AusQuest area of interest. Most of the petroleum exploration has focused on the Galilee Basin sediments to the west and the north west of the AusQuest area of interest.

No coal tenements (EPCs) have been held over the AusQuest area of interest. One EPC (A to P 137C) adjoins to the west AusQuest’s EPM 13001 (Galilee Two), but is of little relevance.

Page 34: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

1Open File Exploration Review – Ausquest’s Drummond Ridge

5. References

Draper, J. J. 1999 Exploration Potential of the Drummond Basin, Central Queensland: A Preliminary Reassessment Based on Deismic, Aeromagnetic and Geochemical Data.Queensland Government Mining Journal, January 1999.

Lam, J. S. and Garrad, P. D.

1993 Mineral Occurrences – Monteagle (8352) and Albro (8252) 1:100 000 Sheet Areas, Central Queensland. Queensland Geological Record 1993/1.

Olgers, F. 1972 Geology of the Drummond Basin, Queensland. Bureau of Mineral Resources, Austustralia, Bulletin 132.

Note: References for company reports used in this review are contained in Appendix 1 as part of the Open File Report Summary Sheets.

Page 35: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

Urella

Tumbarumba/Boomerang Dam

EPM 13003 8253 8353Westlake Tank

EPM 12047

EPM 12046EPM 12045

Lascelles Creek Mag

EPM 13001

8252EPM 13044

Recruit Area A

EPM 13002

8352

Eastern Creek

BP Uranium Drilling

Page 36: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

Figure 1 - AusQuest Drummond Basin Projects - Tenements and Targets

Page 37: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

8253

8252

8353

8352

EPM01408

Figure 2 - Agip Nuclear Australia - 1974 to 1975 - Tenement

Page 38: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

8253

8252

8353

8352

EPM01649

BP Uranium Drilling

Figure 3 - BP Minerals Australia Limited - 1976 to 1978 - Tenement

Page 39: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

8352EPM01948

EPM01851

EPM02122

947

EPM01810

EPM01844EPM01842

EPM01811 EPM01843EPM01841

EPM01872

8154 8254 8354 84

8153 8253 8353 84

8152 8252 84

EPM01

8151 8251 84

Figure 4 - Silver Hills Joint Venture - 1977 to 1979 - Tenements

Page 40: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

8253

8252

EPM01960

EPM01961

EPM01962

EPM01963

8353

8352

Figure 5 - Getty Oil Development Company Limited - 1978 to 1979 - Tenement

Page 41: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

EPM02167

8251EPM02166

EPM02163EPM02165

EPM02164

8154 8254 8354 84

8153 8253 8353 84

8152

8151

8252 8352 84

8351 84

Page 42: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

Figure 6 - Mobil Energy Minerals Australia Inc. - 1978 to 1981 - Tenements

Page 43: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

8253

8

E2PM50

22071

8353

8352

Page 44: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

Figure 7 -Otter Exploration N.L. - 1979 to 1980 - Tenement

Page 45: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

8253 8353

8252 EPM02125

8352

EPM02124

Page 46: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

Figure 8 - Carpentaria Exploration Company Pty. Ltd. - 1979 to 1980 - Tenement

Page 47: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

8252

Scale:

8253 8353

EPM04889

EPM04886

Recruit Area A

EPM04888 8352

EPM04887

Figure 9 - Pioneer Minerals Australia Limited. - 1987 to 1988 - Tenement

Page 48: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

83

Scale:

8253 8353

Monteagle Weak Au A

Lascelles Creek Mag

EPM05039

EPM05279Monteagle Au-A

8252Anomaly 352

EPM05629Anomaly 2

Anomaly 1

Hill 321

Anomaly 4

Page 49: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

Figure 10 - ACM Gold Limited. - 1988 to 1989 - Tenement

Page 50: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

Scale:

EPM05448

EPM05630

8253EPM05471 8353

EPM05449

EPM05540

EPM05566

8252 8352

EPM05567

Figure 11 - Burgundy Exploration Pty. Ltd. - 1988 to 1989 - Tenement

Page 51: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

EPM06958

8154 EPM07080

WillandspeyYarminya Tank 8

EPM06932

8153 8253

Urella

Tumbarumba/Boomerang Dam

Fox Creek 84Westlake Tank

8152

8151

8252

8251

8352 84

8351 84

Figure 12 - Homestake Australia Limited - 1988 to 1989 - Tenements

Scale: 1:1,000,000

Page 52: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000

84

8154 8254 8354 84

8153 8253 8353 84

8152

8151

8252

8251

8352

8351 84

Figure 13 - 1990 to Present - Relinquished Tenements

Scale: 1:1,000,000

Page 53: s3-ap-southeast-2.amazonaws.com · Web viewQLDScale: 1:100,000Location PlanAQ_05163. QLD. Scale: 1:100,000. Location Plan. AQ_05163. QLDScale: 1:100,000AQ_05164. QLD. Scale: 1:100,000