discovery stories from the sepon project...exotic zone 14.00m @ 2.57% cu 30.50m @ 1.15% cu 40.40m @...
TRANSCRIPT
![Page 1: Discovery Stories from the Sepon Project...Exotic Zone 14.00m @ 2.57% Cu 30.50m @ 1.15% Cu 40.40m @ 0.89% Cu 22.90m @ 1.68% Cu Colluvium Fault rock Geology Dolomite Claystone Exotic](https://reader034.vdocuments.mx/reader034/viewer/2022051902/5ff1195d45595f7ccc6d857c/html5/thumbnails/1.jpg)
Discovery Stories from the Sepon Project
![Page 2: Discovery Stories from the Sepon Project...Exotic Zone 14.00m @ 2.57% Cu 30.50m @ 1.15% Cu 40.40m @ 0.89% Cu 22.90m @ 1.68% Cu Colluvium Fault rock Geology Dolomite Claystone Exotic](https://reader034.vdocuments.mx/reader034/viewer/2022051902/5ff1195d45595f7ccc6d857c/html5/thumbnails/2.jpg)
Three stories of discoveryRe-DiscoveringDiscovering
copperDiscovering gold
Insert
picture of
team
Visible gold
in jasperoid
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Refreshing the memory
• Cromie, PW (2010) Geological setting, geochemistry and genesis of the Sepon gold and copper deposits, Laos. PhD thesis, University of Tasmania.
Pacrim, 1999
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Discovering gold
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The right ingredients
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Stream sediment geochemistry
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Gold in soil and auger geochemistry
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Gold in Jasperoid
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Mineralisation and Alteration
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Discovering copper
Is this just a Fault zone?
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Khanong Geology
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Khanong Cu Resource 28.1 Mt at 2.6 % Cu = 730 kt Cu
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Khanong Geology
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Main Chalcocite - Clay Zone and Hypogene Sulphide Zone
36.00m @ 2.04% Cu
62.00m @ 1.39% Cu
83.00m @ 7.27% Cu
7.50m @ 5.67% Cu
Geology
Colluvium
Ironstone
Fault rock
Rhyodacite porphyry
Dolomite/limestone
Claystone
Limonite - clay
Mineralisation Type
Limonite - clay and oxidisedCu minerals
Chalcocite - clay
Pyrite - quartz
LAsp01860
Metres
0 50 100
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Exotic Zone
14.00m @ 2.57% Cu
30.50m @ 1.15% Cu40.40m @ 0.89% Cu
22.90m @ 1.68% Cu
Colluvium
Fault rock
Geology
Dolomite
Claystone
Exotic Cu-Mn wad
Limonite - clay and oxidised Cu minerals
Partially oxidised chalcocite - clay
Chalcocite - clay
Mineralisation Type
Metres
LAsp01859
0 50 100
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Copper mineralisation
• Hypogene sulphideQuartz-pyrite-chalcopyrite 2.0 % Cu
• Supergene in-situChalcocite clay 4.9 % Cu
Partially oxidised chalcocite clay 2.0 % Cu
Limonite-clay & oxidised Cu minerals 8.8 % Cu
Limonite-clay 0.6 % Cu
• Mobilised exoticCu-Mn-wad and Mn-oxide 1.4 % Cu
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Chalcocite Clay
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Limonite-clay & Cu oxides
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Exotic Cu-Mn wad
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ca. 300 Ma
HypogeneMineralisation
PadanIntrusiveCentre Skarn
FrontUp to 4 km of Sediment
= Hydrothermal Fluids
Plan View
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Present Day
Cu
Cu
Base Of SupergeneProfile
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Zonation pattern
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Mineralisation Model
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Sepon in 2016
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1998
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~2013