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Open File Report 11

Mineralogy and geochemistry of weathered shale profiles at the Panglo Gold Deposit, Eastern Goldfields, WA

Scott, K.M.

Profiles through weathered shale derived from reverse circulation drill holes at Panglo have been analyzed mineralogically by X-ray diffractometry. Quartz, muscovite, kaolinite, Fe oxides and halite are ubiquitous through such profiles but zones characterised by the presence of alunite or paragonite or the carbonates, siderite and dolomite, may be usefully employed during exploration. In weathered shale at Panglo, alunite appears to be developed to a greater depth above mineralization whereas paragonite occurs to higher levels in barren sequences. Carbonates occur between the mineralized intervals in one hole and may represent original hypogene wall-rock alteration

Molybdenum and Sb are the best pathfinders for Au with As, Tl and W also useful in specific cases. Elements like Ag, Cu, Pb, Sn and Zn are not consistently associated with the mineralization in the weathered shales at Panglo. The low Sr contents through the profile above mineralization may also be an indicator of mineralization.

Last updated: Tuesday, January 04, 2000 10:28 AM


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