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TitleSpatial 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
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorRogers, N
SourceTargeted Geoscience Initiative 5: contributions to the understanding and exploration of porphyry deposits; by Plouffe, AORCID
logo (ed.); Schetselaar, EORCID logo (ed.); Geological Survey of Canada, Bulletin 616, 2021 p. 25-42, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative 5: contributions to the understanding and exploration of porphyry deposits
File formatpdf; xlsx (Microsoft® Excel®)
ProvinceBritish Columbia
NTS82L/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
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
Subjectseconomic 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
Illustrationsgeoscientific sketch maps; geochronological charts; models
ProgramTargeted Geoscience Initiative (TGI-5) Intrusion/Porphyry ore systems - porphyry processes - mineral markers
Released2021 09 01; 2022 11 17
AbstractMiddle 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.

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