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TitleGeology of the Doris North gold deposits, northern Hope Bay volcanic belt, SlaveStructural Province, Nunavut
AuthorCarpenter, R L; Sherlock, R L; Quang, C; Kleespies, P; McLeod, R
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C6, 2003, 10 pages, (Open Access)
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
NTS76O/15; 77A/03
AreaHope Bay
Lat/Long WENS-107.0000 -106.5000 68.2500 67.7500
Subjectsregional geology; economic geology; gold; mineralization; mafic volcanic rocks; volcanic rocks; igneous rocks; quartz veins; structural features; folds; Archean; greenstone belts; basalts; dykes; gabbros; Hope Bay Volcanic Belt; Doris Suite; timing; Precambrian
Illustrationssketch maps; photographs
Released2003 03 14
AbstractGold mineralization at Doris North is hosted in a conformable succession of mafic volcanic and gabbroic rocks that are folded into a tight, shallowly north-plunging antiform. Mineralization is invariably hosted in continuous white quartz veins displaying semiregular sericite and tourmaline-rich septa.Ahydrothermal alteration assemblage of iron dolomite, sericite, paragonite, and pyrite overprints mafic volcanic
and gabbroic host rocks. Three significant, north-trending vein systems are known: West Valley Wall, Central, and Lakeshore veins. The Hinge zone occurs where the Central and Lakeshore veins merge. The overall geometry of the vein systems closely mimics the regional antiformal fold geometry in basaltic and gabbroic rocks. Textural relationships are consistent with vein emplacement along structural weaknesses created by pre-existing or developing fold structures.