| Title | Origin and character of till and other diamictons and their applicability to mineral prospecting |
| |
| Author | Lian, O B; Hickin, A S |
| Source | Indicator 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 |
| Year | 2017 |
| Alt Series | Mineralogical Association of Canada, Topics in Mineral Sciences 47 |
| Publisher | Geological Association of Canada |
| Publisher | Mineralogical Association of Canada |
| Document | serial |
| Lang. | English |
| Media | paper |
| Related | This publication is contained in Indicator minerals in till
and stream sediments of the Canadian Cordillera |
| Province | British Columbia; Yukon |
| NTS | 82; 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 |
| Subjects | economic 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; Phanerozoic; Cenozoic; Mesozoic; Paleozoic |
| Illustrations | block diagrams; photographs; equal-area stereonet projections |
| Program | Targeted Geoscience Initiative (TGI-5) Porphyry systems |
| Program | NSERC Natural Sciences and Engineering Research Council of
Canada |
| Released | 2017 01 01 |
| Abstract | The 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 ID | 308171 |
|
|