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Conference Proceedings

Annual Conference, Darwin

Conference Proceedings

Annual Conference, Darwin

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The Geology of the Woodcutters Lead-Zinc-Silver Deposit and Its Environment, Rum Jungle Area, Northern Territory

The Woodcutters deposit, 65 km south- southeast of Darwin, N.T., consists of a series of veins of pyrite, sphalerite, and galena with some silver, cadmium, antimony, and arsenic minerals. The veins are hosted by the Early Proterozoic Whites Formation, a sequence of black slates with interbedded carbonate rocks and minor ash tuffs. The known orebodies occur about 300 to 500 metres above the contact of Whites Formation with the underlying Coomalie Dolomite, which consists of dolomite and magne- site. The stratigraphic setting is lithologic- ally similar to that of the Mt. Isa deposit, Queensland. The orebodies are replacement veins occ- urring along fault and dyke structures which are sub-parallel to the axes of a double-nosed faulted anticline. The orebodies are in part associated with two unusual carbonatized lam- prophyric dykes. The dykes were intruded after the fold and its slaty cleavage were formed._x000D_
The ore has replaced the dykes and host rocks and is therefore late-stage hydrothermal miner- alization. The known orebodies are open at depth. A "bonanza" of high-grade ore occurs at the upper part of the largest orebody and is currently the subject of an open cut mine planning study by a consortium of companies headed by Nicron Resources Ltd.
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  • The Geology of the Woodcutters Lead-Zinc-Silver Deposit and Its Environment, Rum Jungle Area, Northern Territory
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  • Published: 1984
  • PDF Size: 0.678 Mb.
  • Unique ID: P198403040

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