Hymap高光谱航摄仪资料(英文)

Lake Mason, Yilgarn Craton, Western Australia
Surficial, calcrete-hosted deposit
Located approximately 80km southwest of the Yeelirrie deposit in the eastern Murchinson region of WA; found in the 1970’s by BP Minerals via shallow carnotite shows Mineralised zones associated with the valley calcretes of the Lake Mason drainage system Defined Mineral Resource of 9.1Mt U3O8 at 185 ppm U3O8 (100ppm cutoff)*
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Hyperspectral Imaging – Spectrometry From The Air
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Spectral Regions Relevant to Geology
Visible and near infrared 400 - 1000 nm (VNIR)
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Western Australia Uranium Deposits
Calcrete-hosted Uranium within the Murchison of the Yilgarn Craton
.au
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-Three types of clay (Halloysite, Kaolinite and Nontrite) are readily discriminated and mapped
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Mineral mapping indicates paleochannels contain Gypsum, Mg-rich Smectite…
Residual muscovite rich sand partially covers some of the calcrete
Calcrete Exploration Targets
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…Dolomite and Calcite. The magnesium-rich smectite (mapped in red) may represent weathered dolomites at depth
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HyMap-derived alteration maps provide a new way of mapping sub-surface and/or weathered calcrete bodies
Spectral range
0.45 – 0.89 um 0.89 – 1.35 um 1.40 – 1.80 um 1.95 – 2.48 um
Bandwidth across module
15 – 16 nm 15 – 16 nm 15 – 16 nm 18 – 20 nm
Average spectral sampling interval
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Langer Heinrich – HyMap derived mineral map
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Known mineralised calcrete bodies
Calcite predominately defines the calcretes in this area
*figures downloaded from Energy Metals Limited, 5June2012
The sandstones of the central Yilgarn
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A standard decorrelation stretch brings out gross lithology and mineral assemblages
Yeelirrie, Yilgarn Craton, Western Australia
World’s largest surficial, calcrete-hosted deposit
Located on the northern margin of the Yilgarn Craton in the Northeastern Goldfields; found in 1972 by WMC Resources (taken over by BHP in ‘05) Mineralised calcretes formed above Archean granites and greenstones; ore zones are within the valley paleodrainage systems; all carnotite Calcrete outcrop is poor with 1-2 m of sand loam and clay overburden
The Yeelirrie Pit, BHP Billiton
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Yeelirrie HyMap Survey – Two flight lines at 4m resolution
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Yeelirrie Alteration Mineral Map
m Deposits
Current mines produce approximately 10% of world Uranium demand - Langer Heinrich is the
second largest mine in Namibia behind Rossing
Uranium Mapping Projects
Four types of Uranium deposits successfully mapped thus far:
Unconformity associated – eg. Ranger (Alligator River) & Pine Creek, NT; Angelo River (Kurradong), WA Surficial deposits, calcrete-hosted – eg. Mason Lake (Yeelirrie), WA; Langer Heinrich and Trekkopje, Namibia Carbonatite associated – eg. Mud Tank, NT; Lofdal & Rossing, Namibia Metasomatic – Valhalla, Bikini & Skal, Mt. Isa, QLD
15 nm 15 nm 13 nm 17 nm

SNR average of 1000:1 ~3-50m pixels (hardened for high-altitude, extreme cold and heat) 60° FOV (strip width ~2.5km at 5 m pixel, ~1.4km at 3.5 m) 1000km2/day (optimal conditions @ 5m) Seamless mineral mapping and geophysical/geochemical integration (~1-6 weeks)
-Comparable to nearby Yeelirrie, the calcretes have formed over a similar granitoid basement
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Leveraging the 100 + bands of HyMap, we map specific mineralogy
*figures downloaded from Paladin, 5June2012
From Paladin Energy Ltd.
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Langer Heinrich, Damara Uranium Province, Namibia
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Langer Heinrich – Broad Lithologic Differentiation
hymap高光谱航摄仪资料英文
Mapping Calcrete Mineralogy using HyMap Imagery in Western Australia and Namibia
M. Hussey and B. A. Martini
HyVista Corporation 11/10 Gladstone Rd., Castle Hill, NSW, AUSTRALIA
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Yeelirrie Alteration Mineral Map – Mine Close-up
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Yeelirrie Alteration Mineral Map: Deposit Alteration Model
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Spectral Signatures: Uranium Alteration Assemblages
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HyMap Instrument
Module
VIS NIR SWIR1 SWIR2
>1,000,000km2 worldwide
Spectral Configuration – 128 channels
Iron oxides and iron bearing minerals (Hematite, Goethite, Jarosite) Rare Earth Minerals Vegetation
Shortwave Infrared OH-bearing minerals

1000 - 2500 nm (SWIR)
Clay Minerals Micas Amphiboles Serpentine, Talc, Chlorites, Epidote

Phosphates Sulfates Carbonates Hydrocarbons
Cellulose (Vegetation) Oils and Waxes (Petroleum and Vegetation) Plastics Methane
Namibian Geologic Survey
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Langer Heinrich, Damara Uranium Province, Namibia
Surficial, calcrete-hosted deposit
Located approximately 80km east of Walvis Bay in central Namibia; found in 1973 by a large-area government sponsored airborne radiometric survey Consists of seven mineralised zones within a 15km long paleodrainage system Mineral resource of 74,415t U3O8 at a grade of 0.06% U3O8 (250ppm cutoff)* Primary ore mineral is carnotite