The geology and mineralogical zoning of the H.Y.C. Ag-Pb-Zn deposit, McArthur River, Northern Territory, Australia
The H.Y.C. Pyritic Shale Member is composed of interbedded potassic bituminous pyritic shale, sedimentary breccia and tuff. The shales contain dolomite nodules, dolomite concretions and black chert globules. The H. Y. C. Pb-Zn deposit, a sedimentary stratiform sulfide deposit, occurs at the base of the member in the H. Y. C. sub-basin. It is postulated that the member was deposited in a saline lacustrine environment, which was subject to oscillations in water level. During periods of low...[Show more]
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