pub 18 111 rs mineral resources - uliege.be
TRANSCRIPT
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Remote Sensing & Mineral Resources
Prof. Eric PIRARD
GeMMe – Georesources & Geoimaging - PhD’s & PostDocs
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Sensing ResourcesTo support the spherical economy
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Spherical Economy
3
Atmosphere
BiosphereBioresources
Organic matter
GeosphereGeoresources
Mineral materials
If you can’t grow it, you’ll have to dig itIf you can’t grow it, you’ll have to dig it
AnthroposphereManufactured goods
Waste
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A world of resources
• Energetic resourceso Oil, Gas, Coal, Lignite,…
o Uranium
• Non-renewable
• Water resources• Vital, Purifiable
• Industrial Mineralso Sand, aggregates, gypsum, …
o Kaolin, talc, diatomea,…
o Gems,…
• Non-renewable, Synthesizable
• Metallic resourceso Base metals
o Precious metals
• “Recyclable”
Georesources ?
44
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A world of resources Deposits
55
• A mineral deposit is• A mineral occurrence of sufficient SIZE and GRADE that it might,
under the most favorable of circumstances, be considered to have economic potential.
• Discoveryo Prospectivity mapping (GIS-based)
• Remote sensing
• Geological mapping
• Geochemical
• Geophysical (magnetic, gravimetric, seismic,…)
o Orebody evaluation
• Drilling and sampling
• Geostatistics for grade and volume estimation
• Geometallurgy
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Mapping MineralsFrom microns to kilometers
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Mapping Minerals Microscopy
77
• AMCO
AMCOAutomated Microscopic Characterization of Ores
UPM Politecnica de MadridUliege - GeMMe
TSL LabsFirst Quantum (CLC) - KGHM
360 nm
438 nm
489 nm
591 nm
692 nm
870 nm
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Mapping Minerals Core-scanning
88
• ANCORELOG
AncoreLog – Analytical Core Logging SystemA mobile drill core logging system that measures chemical, physical and structural rock properties with high accuracy and classifies into geological, geotechnical and geometallurgical domains
DMT, leader
ULiege – GeMMeFraunhofer EZRT; BGR; GTK
LTB; Bachmann; ; U Paris Sud; Eramet; MATSA
© DMT
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Mapping Minerals
• Airborne / UAVo LIDAR
o Hyperspectral Instruments
• Spaceborneo Landsat ETM - 8
o Aster
o Sentinel
Remote Sensing
99
Sentinel 2 bands 2-3-4-8bands 5-6-7-8A
Copernicus Spaceborne Data for Exploration, Mining and Landfill Mining ApplicationsMinEOdust – Mapping Dust Dispersion around Mining / Ore Handling sites
Aster bands 1-2-3 (VNIR)& 4 to 9 (SWIR)
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Exploring Remote RegionsThe Space Shepherd
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Exploring remote regions
• Many deposits were discovered by… shepherds!o Colourful alterations
Unaided eye
1111
Rio TintoCerro Colorado
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Exploring remote regions
• Modern shepherds use band ratios to reveal « gossans »
ASTER
1212
SWIR30 m
2.5 - 1.5 µm
TIR90 m
12.0 - 8.0 µm
VIR15 m
0.95 - 0.4 µm
ASTER B2/B1
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Exploring remote regions
• Modern shepherds use band ratios to reveal « clays » and « carbonates »
ASTER
1313
ASTER (B5+B7)/B6 ASTER (B7+B9)/B8
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Supporting Field GeologyRemote Mapping
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Supporting Field Geology
• Remote geological mapping
LANDSAT - ASTER
1515
Landsat TM PC1/PC2/PC3ASTER PC1/PC2/PC3
Caceres, Bonino, Pirard, 2004, Teledetección geológica de la región de San Pablo de Lipez – XVI Congreso Geológico de Bolivia
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Supporting Field Geology
• False colour imaging on shaded relief
Discovering orebodies
1616
3D visualisation of an ASTER image wrapped over an InSAR DEM.The cliff separates sedimentary (upper-right part) and metamorphic - volcanic (lower-left part) zones.
Bonino et al., 2001, GIROS project
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Supporting Field Geology
• False colour imaging vs. geological boundaries
Discovering orebodies
1717
Visualisation of lithological information from colour-composite image (bands 7-5-4).Bonino et al., 2001, GIROS project
Claystones
Sandstones
Metagreywackes
Deposits
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Supporting Field GeologyAdvanced Mineralogical Mapping
1818
SRTM 90m
ASTER End-Members (PPI)
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Supporting Field Geology
1919
Servant-Vildary, et al 2002 Caceres, et al 2004
Caceres, F., Ali-Ammar, H., & Pirard, E. (2008). Mapping evaporitic minerals in Sud Lipez salt lakes (Bolivia) using remote sensing. Reviews in Economic Geology, 16.
Advanced Mineralogical Mapping
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Revealing Metallogenical Targets
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Revealing Metallogenical Targets
• Mapping of lineaments and possible « shear zones »
2121
Extraction of lineaments from LANDSAT colour-composite imageR = First principal component G = Landsat image (band 5) + directional filter 0°B = Landsat image (band 5) + directional filter 45° Kayes-Kenieba region, Western Mali
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Revealing Metallogenical Targets
• Mapping of lineaments and possible « shear zones »
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Revealing Metallogenical Targets
• More powerful technologies are needed too Penetrate below the surface
o Reveal anomalies through vegetation
2323
A N Hawu Hede et al., 2015, A new vegetation index for detecting vegetationanomalies due to mineral deposits with application to a tropical forest area,Remote Sensing of Environment, V 171.
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Mine Site Monitoring
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Mine Site Monitoring
• Orthophotos and DEMs of quarrieso UAV imaging
25
An orthophoto of one of the pits at the Pueblo Viejo gold mine (Barrick) generated by an eBee (© FlySense)
Stockpile measurementhttp://asmireland.ie/
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Mine Site Monitoring
• Acid Mine Drainage
26
Ast
er b
an
ds
1-2
-3 (
VN
IR)
& 4
to
9 (
SW
IR)
Dardenne V., Caceres F., Hansen H., Bonino E., Pirard E. (2007)Detection of acid drainage effects around Rosia Poieni mine in Romania using ASTER images.–5th EARSeL SIGIS workshop
Aster scene of Rosia Poieni mine site
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Industrial Site Monitoring
• Hyperspectral monitoring of industrial sites in the Meuse valley (Liège, Belgium)o AHS-160 Hyperspectral Instrument
27
R: 0.630 µm, G: 0.571 µm, B: 0.513 µm
Dardenne V., Caceres F., Hansen H., Bonino E., Pirard E. (2006) GRSG Annual Meeting London – Dec 2006
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Industrial Site Monitoring
• Dust Dispersiono Spectral Feature Matching
• Coking coal
• Iron sinter
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Iron oxide sinter
Coking plant
Meuse river
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Industrial Site Monitoring
• Vegetation Stresso Geochemical mapping
o Vegetation indices
29
High As & Pb concentrations potentially linked to unhealthy
vegetation
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Processing and Handling
• Volume estimation of stocks
30
Product Size
Angle of Repose
(degrees)
Bulk Density
(t/m3)
Average Std. Dev. Average Std.
Dev. Ultra-fines (pellet feed)
< 0.15 mm = 92% 38 4 2.32 0.11
Fines (Sinter Feed (+concentrates))
[1-9.5 mm] = 58% < 1mm = 42%
36 2 2.59 0.15
Pellet [8-18mm]= 96% 28 4 2.16 0.10 Lump [12.5-31.5
mm]=65% 31 0 2.56 0.00
1 Jan 2005
27 Mai 2005
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Regional Monitoring
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Regional Monitoring
• Map-X and the EITIo Transparency of supply chains
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Regional Monitoring
• Map-X and the EITIo Transparency of supply chains
33
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What’s next ?Imagination…