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TitleLithological and structural setting of structurally controlled gold mineralization in the Wilding Lake region, central Newfoundland
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AuthorHonsberger, I W; Bleeker, W; Sandeman, H A I; Evans, D T W
SourceTargeted Geoscience Initiative: 2018 report of activities; by Rogers, N (ed.); Geological Survey of Canada, Open File 8549, 2019 p. 59-69, https://doi.org/10.4095/313640 (Open Access)
Year2019
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Rogers, N; (2019). Targeted Geoscience Initiative: 2018 report of activities, Geological Survey of Canada, Open File 8549
File formatpdf
ProvinceNewfoundland and Labrador
NTS12A
AreaWilding Lake; Newfoundland
Lat/Long WENS -58.0000 -56.0000 49.0000 48.0000
Subjectseconomic geology; regional geology; structural geology; mineral deposits; gold; epigenetic deposits; mineral exploration; mineral potential; ore mineral genesis; mineralization; ore controls; structural controls; bedrock geology; lithology; sedimentary rocks; conglomerates; igneous rocks; volcanic rocks; volcaniclastics; felsic volcanic rocks; intrusive rocks; structural features; faults; shear zones; fractures; folds; quartz veins; sulphides; tectonic setting; deformation; slickensides; foliation; lineations; kinematic analysis; Red Indian Line; Victoria Lake Sear Zone; Rogerson Lake Conglomerate; Valentine Lake Thrust Fault; Red Ochre Complex; Elm Zone; Antler Property; Dunnage Zone; Gander Zone; ore systems approach; orogenic gold deposits; extension; gold showings; Phanerozoic; Paleozoic; Silurian; Ordovician; Cambrian; Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; cross-sections, structural; photographs
ProgramKnowledge Management Coordination, Targeted Geoscience Initiative (TGI-5)
ProgramGold ore systems - tectonic drivers and conduits, Targeted Geoscience Initiative (TGI-5)
Released2019 03 01
AbstractThe structurally controlled central Newfoundland gold belt is emerging as one of the next significant mining jurisdictions in Canada. Gold mineralization is associated with crustal-scale faults that preserve synorogenic conglomerates, similar to the setting of orogenic gold in the Archean Abitibi greenstone belt. Recent exploration in the Wilding Lake region exposed a system of auriferous quartz veins hosted within sedimentary and volcanic rocks. Detailed lithological and structural documentation of these newly exposed zones was conducted to examine controls on gold mineralization and place the vein system into a regional context.
Field data demonstrate that the main 'Elm' quartz vein extends for approximately 230 m along strike, is up to 2 m wide and cuts the conglomerate host within an oblique sinistral shear zone that accommodated north-northeast-directed thrusting. An early set of moderately dipping extensional quartz veins, consistent with oblique sinistral shear, emanate from the main vein. A later, more steeply dipping set of extensional quartz veins crosscut the main vein and the earlier vein set, and are consistent with a component of horizontal extension. Chalcopyrite and malachite occur locally in the early vein set, but are more abundant overall within the younger vein set. A nearly conjugate set of steeply dipping extension fractures crosscut the main vein and the two vein sets. These fractures are filled typically with vuggy quartz and unaltered and altered sulphides. Field data are consistent with progressive deformation characterized by early oblique compressional sinistral shear and subsequent components of subhorizontal extension and minor dextral strike-slip.
GEOSCAN ID313640