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TitleOrigin and character of till and other diamictons and their applicability to mineral prospecting
AuthorLian, O B; Hickin, A S
SourceIndicator minerals in till and stream sediments of the Canadian Cordillera; by Ferbey, T (ed.); Plouffe, A (ed.); Hickin, A S (ed.); Geological Association of Canada, Special Paper vol. 50, 2017 p. 109-127
Year2017
Alt SeriesMineralogical Association of Canada, Topics in Mineral Sciences 47
PublisherGeological Association of Canada
PublisherMineralogical Association of Canada
Documentserial
Lang.English
Mediapaper
RelatedThis publication is contained in Ferbey, T; Plouffe, A; Hickin, A S; (2017). Indicator minerals in till and stream sediments of the Canadian Cordillera, Geological Association of Canada, Special Paper vol. 50
ProvinceBritish Columbia; Yukon
NTS82; 83; 84; 85; 92; 93; 94; 95; 96; 102; 103; 104; 105; 106; 107; 114; 115; 116; 117
Lat/Long WENS-141.0000 -113.5000 70.0000 48.0000
Subjectseconomic geology; surficial geology/geomorphology; sedimentology; mineral deposits; mineral exploration; prospecting techniques; drift prospecting; exploration guidelines; glacial deposits; tills; lodgment tills; glacial history; glaciation; deglaciation; sediment transport; sediment dispersal; provenance; source areas; source rocks; depositional environment; clasts; striations; shearing; morphology; fracturing; Canadian Cordillera; ice-flow directions; diamictons; subglacial tills; meltout tills; sublimation tills; deformation tills; comminution tills; flow tills; Phanerozoic; Cenozoic; Mesozoic; Paleozoic
Illustrationsblock diagrams; photographs; equal-area stereonet projections
ProgramPorphyry systems, Targeted Geoscience Initiative (TGI-5)
ProgramNSERC Natural Sciences and Engineering Research Council of Canada
AbstractThe use of near-surface sediment sampling for mineral exploration, or drift prospecting, is a well-established technique in the Canadian Cordillera. To be useful, a geochemical or mineralogical signal detected in a sample must be from media with a decipherable transport history that enables the geochemical or mineralogical anomaly to be traced back to a primary bedrock source. Subglacial till, the sediment transported by, and deposited directly from, ice at the base of a glacier, with minimal sorting by water, is an excellent media for drift prospecting. It is commonly a first derivative of bedrock, with a transport path that is typically linear and predicable, even in cases with multiple ice-flow directions. Distinguishing subglacial till from other glacial and non-glacial deposits may, however, be challenging for mineral explorers. To this end, we review the origin and nature of till deposits, and those of other origins that may resemble till, in order to assist in identifying the distinctive characteristics that can be used to interpret genesis. Consistently recognizing and sampling subglacial till will simplify interpretation and ultimately increase the potential for new mineral deposit discoveries.
GEOSCAN ID308171