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TitleGeology of Rookery Creek zinc-lead showings, Cornwallis Island, Nunavut
AuthorTurner, E; Dewing, K
SourceGeological Survey of Canada, Current Research (Online) no. 2002-B2, 2002, 11 pages,
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (2002). Current Research 2002, winter release, Geological Survey of Canada, Current Research no. 2002
File formatpdf (Adobe Acrobat Reader)
AreaCornwallis Island; Rookery Creek
Lat/Long WENS-95.9167 -95.5000 75.3833 75.3000
Subjectsregional geology; structural geology; economic geology; stratigraphy; bedrock geology; structural features; faults; anticlines; lead zinc occurrences; mineral occurrences; lead; zinc; mineralization; shales; conglomerates; mudstones; stratigraphic correlations; Bay Fiord Formation; Thumb Mountain Formation; Irene Bay Formation; Cape Phillips Formation; Barlow Inlet Formation; Bird Fiord Formation; Hecla Bay Formation; Ordovician; Silurian; Paleozoic; Devonian
Illustrationssketch maps; photographs; stratigraphic sections
Released2002 03 08
AbstractFour zinc-lead showings are known from the Middle Ordovician Bay Fiord and Thumb Mountain formations at Rookery Creek on western Cornwallis Island. Mapping of the Rookery Creek area was updated at 1:50 000 scale. The geology is complex, with four fault sets superimposed on a broad anticlinorium. Three of four showings are at the intersection of a northwest-trending 'fulcrum fault', that forms the western edge of a half graben, with east-trending faults that offset stratigraphic units within the half graben. Despite the existence of three as yet untested areas in which mineralization might be expected, the attractiveness of Rookery Creek as an exploration target is reduced by the lack of a shale aquitard to mineralizing fluids, and by a low Pb/Zn ratio, suggesting a smaller fluid system than was present at Polaris mine. Other areas structurally similar to Rookery Creek and favourable for Zn mineralization, however, may be present elsewhere on the island.