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Alberta Mineral Assessment Reporting System

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LOGISTICAL REPORT ON TIME-DOMAIN EM SURVEYS IN THE MAYBELLE RIVER AREA OF NORTHERN ALBERTA

On Behalf Of:

Uranerz Exploration and Mining Limited 1300 Saskatoon Square 410 - 22nd Street East Saskatoon, Saskatchewan S7K 5T6

Contact: P. Robertshaw Telephone: (306)665-0566

0

.

By:

JVX Ltd. 60 West Wilmot St., Unit 22 Richmond Hill, Ontario L4B 1M6

Contact: Blame Webster Telephone:(416) 731-0972

JVX Ref: 89031 UEM Ref: 71-42 March 1989

JVx .

I TABLE OF CONTENTS

1. INTRODUCTION

2. SURVEY LOCATION AND ACCESS

3. SURVEY GRID AND COVERAGE

4. PERSONNEL

5. INSTRUMENTATION

. 5.1 IP Receiver 5.2 IP Transmitter 5.3 Data Processing

6. SUMMARY

Page No.

1

1

1

2

3

3 3 3

5

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FIGURES

Figure 1: Maybelle River II Project Area 71-42 scale 1:5,000,000

Figure 2: Location of TEM Survey February 1989 scale 1:125,000

Figure 3: Decay Waveforms

TABLES

Table 1: Production Summary

Table 2 EM-37 30Hz Channel Times

APPENDICES

Appendix 1: Instrument Specification Sheets

Appendix 2: Map I - 1989 TEM Coverage

Appendix 3: Data Profiles

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A REPORT ON GROUND GEOPHYSICAL SURVEYS CONDUCTED IN THE MAYBELTJE RIVER AREA

OF NORTHERN ALBERTA

On Behalf Of

Uranerz Exploration and Mining Limited.

1. INTRODUCTION

From January 29th and February 23rd, 1988, Time Domain Electromagnetic (TDEM) surveys were conducted on behalf of Uranerz Exploration and Mining Limited (henceforth called UEM) on the Maybelle River Project 71-42 in northern Alberta, by JVX Ltd.

The survey employed fixed loops of 600m x 600m and 800m x 800m and moving loops of lOOm x lOOm, and 200m x 200m with a nominal station separation of 50 metres.

• 2. SURVEY LOCATION AND ACCESS

The survey area is located in the May-belle River area of northern Alberta approximately 100km southeast of Fort Chipewyan.

Figure 1 shows the location of the survey area with respect to nearby population centres at a scale of 1:5,000,000.

3. SURVEY GRID AND COVERAGE

Survey locations are illustrated in figure 2 at scale of 1:125,000. Map 1 of appendix II illustrates the TDEM coverage at a scale of 1:10,000. A total of aproximately 18.65 line-km of fixed loop coverage and aproximately 2.55 line-km of moving loop coverage was achieved. Daily activity, applicable permit areas and daily- production are detailed in table I below.

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TABLE 1 PRODUCTION SUMMARY

.

DATE

Jan. 29 30 31

Feb. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

PERMIT ACTIVITY PRODUCTION (km)

6884100001 Lay 1A 6884100001 Read 1A, Lay lB

1.0

6884100001 Read lB

1.0 6884120001/6884100002 Lay 92A & 92B, Read L-92N

2.4

6886050005 Lay SOB 6886050005 Read 50B, Lay 50A

1.4

6886050005 Read SOB

2.8 6884100001 M/L - lOOxlOO, 11 Loops

0.55

6884100001 M/L - lOOxlOO, 6 Loops

0.3 6886050003 Lay 1A, 800x800 6886050003 Read bAIL-10N, Lay lOB

1.7

6886050003 Read L.-18N/10A

1.6 6886050003 Read L-10N/10B

1.4

6886050002 Lay 28A, 600x600 Breakdown Breakdown Weather Weather

6886050002 M/L - 200x200, 7 Loops

035 6886050002 M/L - 200x200, 10 Loops

0.50

6886050002 Read 28B, 600x600

1.55 6886050002 M/L - 200x200, 17 Loops

0.85

6886050002 Lay/Read 280, 600x600

1.2 6886050006 Lay 68A (600x600) ,Sounding 28C 6886050006 Read 68A, Lay 68B

1.3

6886050006 Lay/Read 68B

1.3

4 PERSONNEL

Mr. Howard Northfield - Geophysicist/Party Chief. Mr. Northfield operated the Geonics EM-37 ThEM system and compiled the data with the Compaq Portable II microcomputer and Geonics software. Mr. Northfield acted as party chief and was responsible for data quality and the day to day operation and direction of the survey.

Mr. A. Blais, Mr. G. Locke and Mr. E. Ocheewaawan - acted as field assistants.

Casusal assistants were hired locally when necessary

Mr. Howard Northfield - Geophysicist. Mr. Northfield prepared this logistical report.

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Mr. Phil Robertshaw - Senior Geophysicist, UEM Ltd. Mr. Robertahaw provided overall supervision of the survey and reporting from the Jas Lake camp.

Mr. Blame Webster — President, JVX Ltd. Mr. Webster provided overall supervision of the survey and reporting from the Toronto office.

5. INSTRUMENTATION

5.1 Receiver See Appendix I

5.2 Transmitter See Appendix I

5.3 Data Processing

The TDEM survey data were archived, processed and plotted by a Compaq portable II microcomputer using an Epson FX-286 dot matrix printer. The system was configured to run the Geonics software package, a suite of programs that was written specifically to in with the EM-37 receiver and data logger. At the conclusion of each day's data collection, data resident in the data logger's memory was transferred, via serial communication link, to the computer — thereby facilitating editing, processing and presentation operations. All data was archived on floppy disk.

T:ot.tm,iuq,

(and pf.mOIy mOQAhIC 1,614)

Ifld.Ctd Ornt

SICoAdGry (Osq,SI Cur,SAI and

''OQflStIC field

typiCI tranicfl( (showing init i al gate.).

.

.

is

Zo

2b

2c

TEM Waveforms Figure 2

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For a 30 Hz transmit and receive time the slices of integration for the Geonics EM-37 system are as follows:

FROM TO MIDPOINT Channel msec msec meec

1 0.080 0.097 0.089

2 0.097 0.121 0.109

3 0.121 0.158 0.140

4 0.158 0.195 0.177

5 0.195 0.224 0.219

6 0.224 0.316 0.280

7 0.316 0.393 0.355

8 0.393 0.492 0.634

9 0.492 0.634 0.563

10 0.634 0.790 0.712

11 0.790 0.962 0.876

12 0.962 1.221 1.090

13 1.221 1.580 1.400

14 1.580 1.950 1.765

15 1.950 2.440 2.195

16 2.440 3.160 2.800

17 3.160 3.930 3.545

18 3.930 4.920 4.425

19 4.920 6.340 5.630

20 6.340 7.900 7.120

Table 2 EM-37 30Hz Channel Times

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6. SUMMARY:

From January 29th to February 23rd, 1989, JVX Limited carried out TEM surveys on behalf of UEM on the Maybelle River Project 71-42 in northern Alberta.

The survey employed fixed loop and moving loop tecniques using a 50 metre sampling interval. A total of approximately 18.65 line-km of fixed 100p

and approximately 2.55 line-km of moving loop coverage was achieved.

The digital data from this survey has been archived by JVX. One copy of the data on diskette was given to UEM at the conclusion of the survey.

The copy of all the data will be held by JVX on UEM'B behalf fo a period not 1085 than five years. UEM may at any time within this period ask for copies of the raw data or derivative products.

If there are any questions with regard to the survey please do not hesitate to call the undersigned at JVX Ltd.

. Respectfully submitted,

JVX Led. I

Howard J. Northfield, B.Sc.

.

Blame Webster, B.Sc. PresidentS

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Appendix I

Specification Sheets

0

C EON I Cs LIMITED T:4 580

1745 Meyerside Dr. Unit 8 Mississauga, Ontario Canada L5T 105 Cables: Geonics

GEONICS F!'437-3

DIGITAL DATA PAC DDP37

Geonics Limited is pleased to introduce a new data logger/receiver controller for their EM37-3; the DAS54-P now the standard logger component of Geonics Digital Data Pac DDP37.

Designed to assist in the editing and interpretation of the large volume of survey

data which quickly results from surveys carried out with the Thf37-3 Transient Electromagnetic System, DDP37 consists of the DAS54-P logger, and a set of software

utilities for operation on ]}IB PC or compatible microcomputers.

The DAS54-P is tailored specifically for the F1v137-3, providing digital storage

for up to 370 sets of measurements and automatically controlling operation of

the receiver so that measurements can be made without access to the Ev137-3 front

panel. Collection and averaging of two polarity measurements is automatic for each set, providing both high accuracy offset removal and maximum storage effi-ciency. The operator can easily review all 22 data channels or any of the digital

or header data (survey line, station number, gain, etc.) for any recorded set. The unit is powered with its own re-chargeable battery for minimal drain on the

EM37-3, and with additional power from the EM37-3 can be operated at temperatures down to -30°C.

Geonics Limited has standardized on the I4 PC family of microcomputers for

handling and interpreting Ev137 data. The more rugged clones, such as the Compaq

portables, provide a relatively inexpensive, transportable, high-capability

computing facility in a format that has become widely supported throughout the scientific, geophysics and computer communities.

Continued.....

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Users of the FM37-3 Digital Data Pac are supplied with a suite of software

facilities for acquisition, editing, and interpretation of P1437 survey data.

Program P0L37 provides the interface to the DAS54-P, transferring recorded data from the logger to the computer or loading programs into the logger using

the standard RS232C protocal. Once in the computer, data can be readily edited

and displayed using program DAT37, and different reduction procedures carried

out to generate. profiles or decay plots as raw field data, turnoff corrected

impulse response, integrated step response, or late stage apparent resistivity

or conductivity. Outputs are available for line printer and HP 7470 plotter.

Interpretation is aided by several forward modelling facilities specially

written for rectangular transmitter geometries. MJD37 allows the operator

to model and combine the instrunnt responses for geological structures including:

Ci) Uniform halfspace;

(ii) Infinite horizontal thin conductive sheet at depth;

(iii) Finite rectangular thin conductive plates.

Program RECrAN models the response for arbitrary horizontal conductivity layering.

By comparing actual field data with the results of forward modelling, the inter-

preter can quickly identify likely candidates for the sub-surface structure.

Also available as an additional option is TEMIX, a program for the automatic

inversion of P1437 soundings to a horizontally layered model.

Geonics Limited is continuing to develop additional techniques for the inter-

pretation of P1437 survey data, and as new programs are developed they will be available to users of the P1437-3.

MAY 1987

.

.

—I

Page 2.

2. INPUT AND OUTPUT CONNECTIONS

.

Input Data Via - Keyboards and 50 pin "D't subminiature connector - Cannon P/N DD50P

Pin assignments for the connector are as follows:

PIN DESCRIPTION PIN DESCRIPTION

1 Ch 5 Ch 2 Ch 6 Cho 3 Ch 7 Ch 4 Ch 8 Ch 9 Ch 30 N/C

10 Ch 10 31 Ready

11 Ch 11 32 + 12V Power (Battery)

12 Ch 12 33 N/C

13 Ch 13 34 Digital Ground

14 Ch 14 35 N/C

15 N/C 36 Freq (LSB)

16 + 12V Regulated 37 N/C

17 - 12V Regulated 38 Ch 15

18 Ch 18 39 Ch 16

19 Ch 19 40 Ch 17

20 Ch 20 41 Gain 0 (LSB)

21 Ch 0 (Primary Field) 42 Gain 1

22 T/O Time 43 Gain 2

23 Freq (MSB) 44 Gain 3 (MSB)

24 N/C 45 N/C

25 N/C 46 Signal Ground (analog)

26 N/C 47 Heater Ground

27 N/C 48 Polarity Input

28 N/C 49 Start Integration

29 N/C 50 Polarity Output

.

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DAS54-P TECHNICAL SPECIFICATIONS

1. GENERAL CHARACTERISTICS

Number of Analog Channels

Number of Records

Analog Inputs

Recording Resolution

Analog Input Impedance

Display

Keyboard

Number of Digital I/O

Output Communication

Output Baud Rate

Programming Language

Internal Power Back-up Battery Main Battery

External Power Requirements (from EM37-3) Normal Mode Display

Temperature Range

Dimensions

Weight

22

370 (4 digit recording) 260 (5 digit recording)

± S Volts Max.

0.1 mV

100 kc2

2 Line by lb character alphanumeric LCD.

Hermetically sealed membrane keyboard with 21 keys.

:9

Serial RS-232C

300 to 19200 BPS

Polycode

Alkaline 9-V / 40 hours 6 Size 'tAA't - Rechargeable

± 10 mA at ± 12 volts 600 mA at 12 volts (only when it turns on

-30°C to 50°C

22 x 11.5 x 6.5 cm

1.8 kg

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Page 3.

MSB LSB FREQ.

o 0 LOW O 1 MED 1 0 HIGH

Pin 50 POLARITY

1 Positive 0 Negative

Output Data Via

3. FEATURES

Storage Medium

Recording Time

Standard RS-232C port a 25 pin "D" subminiature connector ITT CANNON P/N DB-258P

CMOS STATIC RAM with Battery back-up

One record of 22 analog channels (two polarity averaged), 7 digital channels, and the header, takes about 28 seconds, for integration n=8

22 which consist of:

1 Primary field channel; 1 Turn-off (T/O) channel; 20 Output channels.

0

Analog Channels

Display

Data Recall

Page 4.

9 lines which consist of the Freq.; Gain; Ready; and Polarity.

User inputs which consist of the: Date; Line; Station; Component; Tx Size; Tx Position; Tx Turn-off; Tx Current; Rx Coil Area; Synch. Mode and Comment.

32 Character alphanumeric LCD with heater for low temperature capability. Heater switches on and off automatically as necessary when the temperature drops to about 3°C..

Data can easily be recalled to the display.

w Digital Channels

Header

0

March 1987.

GEONICS LIMITED

.

EM37-3 Ground Transient Electromagnetic System Technical Specifications

Transmitter

.

.

See Fig. 1

3Hz, 75l-1z or 30Hz in countries using 60Hz power

line frequency; 2.5Hz, 6.25Hz or 25Hz in

countries using 50Hz power line frequency; all

six base frequencies are switch selectable.

fast linear turn-off of maximum 450 usec. at

30 amps into 300x600m loop. Decreases pro-

portionally with current and (loop area) to

minimum of 20 usec. Actual value of At read

on front panel meter.

any dimensions from 40x40m to 300x600m maximum

at 30 amps. Larger dimensions at reduced current

Transmitter output voltage switch adjustable for

smaller loops. Value of loop resistance read

from front panel meter; resistance must be

greater than 1 ohm on lowest voltage setting to

prevent overload.

- circuit breaker protection against input over-

voltage; instantaneous solid state protecticn

against output short circuit; automatically

resets on removal of short circuit. Input voltage

output voltage and current indicated on front

panel meter.

- 150 volts (zero to peak) maximum;

20 volts (zero to peak) minimum - 2.3 kw maximum

- Option (A) - 1300m ItlO copper wire on 6 reels Option (B) - 1800m #4 aluminum wire on 12 reels 2 reel winders supplied

- S HP Honda gasoline engine coupled to 120 volt,

3 phase, 400Hz alternator. Approximately S hours

continuous operation from full (built-in) fuel tank.

Current Waveform

Repetition rate

Turn-off time (At)

Trnsmjtter loop

Transmitter protection

Transmitter output voltage

Transmitter output power

Transmitter wire supplied

Transmitter motor generator

Output connector

Synchronization to Tx

Receiver

Receiver output noise referred to input

Receiver batteries

0

time rate of decay of magnetic flux along 3 axes

air-cored coil of bandwidth 40 kI(z; 100cm dia.

by 7x5cm cross-section. Coil holder supplied to

facilitate measurement along 3 axes.

20 time channels with locations and widths as

shown in Fig. 2. Successive operation at 30Hz,

then 3Hz, effectively gives 30 channels covering

range from 80 psec. to 80 msec.

4 digit plus sign LED display; display also show

channel number and gain.

cycles at 30Hz; n=4,6,8,10,12,14 (switch

selectable); similar integration times at other

base frequencies.

typically l.5x10 0 volt/M 2 at last gate at 30Hz

with integration time of 34 seconds. Noise will

be higher during intense local spherics activity.

all 20 channels in analogue format and house-

keeping functions in digital format available

from output connector.

any of the following (switch selectable)

(1) reference cable

(2) primary pulse

(3) 27 tlHz radio link (40 channels)

(4) high stability (oven controlled) quart: crystals.

Selective clipping of atmospheric noise pulses

at all times. Audio output of Rx coil (trans-

mitter pulse blanked out) is available on built-

in loud speaker for ready identificationof

interference.

12 volt rechargeable Gel-cell; 9 hours continu-

ous operating time at 17°C. Two batteries and

a battery charger supplied to permit charging of

second battery from transmitter motor-generator

during survey.

.

Measured quantity

Sensor

Time channels

Output display

Integration time

Noise rejection circuitry

.

I (t)

20 gates (logarithmically so aced)

—T— t

T

Transmitter Current waveform

FIG. 1

30 Hz

7.5 Hz

3 Hz

Gate Number

I if 2j 3 f 4 S 167 8 9 ; 1 012I1i4saoa7 8119e0

H fJt I IThTTfl • 0.lmsec imsec i lOmsec

I tHHH-J imsec lOmsec

imsec lOmsec lOOmsec

Gate Location and Widths (30H7-, 7.5Hz and 3Hz)

FIG. 2.

0

Delivered Items

S

EM37-3 Ground Transient System consists of the following delivered items:

1 Transmitter console

1 Transmitter ground power unit (GPIJ) consisting of motor and alternator

1 Receiver console including battery

1 Receiver coil

1 Receiver coil holder

1 Spare receiver battery

1 Battery charger

1 Set interconnecting cables

1 Set shipping boxes

2 Instruction manuals

1 Set of data reduction piograms (written in Basic)

I

EM37-3 Transmitter Loop Option:

6 (or 12) reels transmitter wire (depending on Aluminum or Copper wire option

2 Reel winders

July 3l984.

S

Transmitter console

GPU

Wirewjnde r

Wire reels: Option A Option B

Receiver console

Receiver coil

Component Dimensions

25x42x36 cm

35x74x48 cm

42x33x35 cm each (2 off)

33x3l (dia.)cm each 6 off 33x31 (dia.)cm each 12 off

38x37x27 cm

100 cm dia. 7x5 cm cross-section

Copnent Weights

Transmitter console 20 kg GPU

60 kg

S Wirewjnders and loaded reels (30 amp) 130 kg (total)

Receiver console (incl.20 amp-hour 21.8 kg Receiver Coil

battery) 8.0 kg

I

0

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Appendix 2

Map 1 1989 TEM Coverage

.

I

0

.

.

(.4

.

0

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.

Appendix 3

Data Profiles

.

.

.. . .. .....

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