| Title | Spatial and temporal distribution of the Late Triassic to Early Jurassic porphyry-style mineralized plutons of the Quesnel terrane, British Columbia: inferences on tectonic controls and porphyry
prospectivity |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Rogers, N |
| Source | Targeted Geoscience Initiative 5: contributions to the understanding and exploration of porphyry deposits; by Plouffe, A (ed.); Schetselaar, E (ed.); Geological Survey of Canada, Bulletin 616, 2021 p. 25-42, https://doi.org/10.4095/327961  Open Access |
| Image |  |
| Year | 2021 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative 5: contributions to the understanding and exploration of porphyry deposits |
| File format | pdf; xlsx (Microsoft® Excel®) |
| Province | British Columbia |
| NTS | 82L/04; 82L/05; 82L/12; 82L/13; 92I/01; 92I/02; 92I/03; 92I/06; 92I/07; 92I/08; 92I/09; 92I/10; 92I/11; 92I/14; 92I/15; 92I/16; 92O/16; 92P/13; 92P/14; 92P/15; 93A/02; 93A/03; 93A/04; 93A/05; 93A/06; 93A/07;
93A/10; 93A/11; 93A/12; 93A/13; 93A/14; 93A/15; 93B/01; 93B/08; 93B/09; 93B/16; 93N; 93O/04; 93O/05; 93O/12; 93O/13; 94B/04; 94B/05; 94C/01; 94C/02; 94C/03; 94C/04; 94C/05; 94C/06; 94C/07; 94C/08 |
| Area | Kamloops |
| Lat/Long WENS | -121.5000 -119.5000 51.0000 50.0000 |
| Lat/Long WENS | -122.5000 -120.5000 52.8333 51.7500 |
| Lat/Long WENS | -125.7500 -123.7500 56.5000 55.0000 |
| Subjects | economic geology; geochronology; tectonics; stratigraphy; Science and Technology; Nature and Environment; Lower Jurassic; Upper Triassic; mineral deposits; porphyry deposits; mineral exploration; ore
mineral genesis; mineralization; ore controls; tectonostratigraphic zones; tectonic history; mantle; lithosphere; magmatism; magmatic arcs; intrusions; subduction; alkalinity; bedrock geology; structural features; faults; homoclines; lithology;
radiometric dating; uranium lead dates; zircon dates; modelling; Canadian Cordillera; Quesnel Terrane; Cache Creek Terrane; Guichon Creek Batholith; Iron Mask Batholith; Takomkane Batholith; Granite Mountain Batholith; Hogem Batholith; Nicola Group;
Rossland Group; Ymir Group; Thuya Batholith; Iron Lake Suite; Copper Mountain Suite; Wildhorse Suite; Guichon Creek Suite; Slocan Group; Phanerozoic; Mesozoic; Jurassic; Triassic |
| Illustrations | geoscientific sketch maps; geochronological charts; models |
| Program | Targeted Geoscience Initiative (TGI-5) Intrusion/Porphyry ore systems - porphyry processes - mineral markers |
| Released | 2021 09 01; 2022 11 17 |
| Abstract | Middle Triassic to Middle Jurassic arc-related sequences of the Quesnel terrane, British Columbia, host numerous major porphyry deposits. In south-central Quesnel terrane, temporal and spatial
distribution of deposits have been related to eastward-younging, subparallel belts of coeval, compositionally similar associated plutonic suites corresponding to shallowing of Cache Creek subduction beneath the Quesnel terrane.
Changes in
alkalinity of arc magmatism is best explained by ingress of hot primitive mantle due to tectonic processes (i.e. slab rollback, tears, or break-off); however, such mechanisms are inconsistent with eastward migration of magmatism within a dominantly
submergent (largely marine) arc built above east-dipping subduction. Furthermore, the plutonic belts were defined for the southern Quesnel terrane and are far less apparent farther north. Notably, the plutonic belts are defined on the oldest exposed
intrusions, with their distribution correlating to the overall eastward-younging of fault-bounded country-rock panels.
In this paper, it is suggested that the axis of arc magmatism could remain largely static relative to the leading edge of the
Quesnel terrane, with the observed distribution of southern Quesnel plutonism explained by post-depositional structural arrangement of fault-bounded blocks. This model raises the possibility of undiscovered early mineralization being buried beneath
Rhaetian and younger sequences exposed in central and eastern Quesnel fault panels. |
| Summary | (Plain Language Summary, not published)
This Bulletin published by the Geological Survey of Canada contains ten articles summarizing the results of five-year research projects conducted on
porphyry deposits in Canada as part of the Targeted Geoscience Initiative (TGI). Porphyry deposits are ore bodies, including past-producing and active mines, associated with intrusive rocks such as granite. They are significant producers of a variety
of metals, including copper, molybdenum, tin and tungsten. Nine out of ten papers describe projects conducted in the Canadian Cordillera where most Canadian porphyry deposits occur and a paper on similar, but older deposits in the Appalachians of
Atlantic Canada. The main objective of these TGI research projects was to better define the geological conditions where porphyry deposits form and test techniques to detect buried porphyry deposits in support of mineral exploration. |
| GEOSCAN ID | 327961 |
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