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TitleA sulphide deposit containing galena, in the lower devonian Disappointment Bay formation on Baillie Hamilton Island, Canadian Arctic Archipelago
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorThorsteinsson, R
SourceCurrent research: part B/Recherches en cours: partie B; by Geological Survey of Canada; Geological Survey of Canada, Paper no. 84-1B, 1984 p. 269-274, Open Access logo Open Access
Mediapaper; on-line; digital
RelatedThis publication is contained in Current research: part B
File formatpdf
AreaBaillie Hamilton Island; Canadian Arctic Archipelago
Lat/Long WENS-95.0000 -94.0000 76.0000 75.7500
Subjectseconomic geology; general geology; galena; dolomites; x-ray diffraction analyses; lead; zinc; Disappointment Bay Formation; Devonian
Released1984 01 01; 2010 11 04
AbstractBaillie Hamilton Island is situated in a region noted for lead and zinc deposits similar in many respects to the Mississippi Valley-type ore deposits. A sulphide deposit that includes small amounts of galena occurs in porous and vuggy dolomite of the Disappointment Bay Formation near the southwestern extremity of Baillie Hamilton Island. Mineralized deposits are rare in the Disappointment Bay Formation, and the present deposit adds further interest to this formation as a potential host for lead and zinc ore bodies. Most lead and zinc occurrences in this region of the archipelago, including that of the currently operated Polaris Mine, are replacement deposits in carbonate rocks of the Ordovician Thumb Mountain Formation that were exposed to erosion and karstification in Early Devonian time, and subsequently overlain unconformably by the Disappointment Bay Formation. Structural evidence is presented here that suggests the Disappointment Bay in southwestern Baillie Hamilton Island may lie directly on the Thumb Mountain. This in turn raises the possibility, however tenuous, that the sulphide deposit in that region indicates the presence of an ore body at depth in Thumb Mountain strata.

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