Petrogenesis and Magmatic Evolution of the Guichon Creek Batholith: Highland Valley Porphyry Cu ± (Mo) District, South-Central British Columbia☼

D’Angelo, Michael; Alfaro, Miguel; Hollings, Pete; Byrne, Kerry; Piercey, Stephen J.; Creaser, Robert A.

doi:10.5382/econgeo.2017.4532

Cited by 28 publications

(37 citation statements)

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“…Geochemical analyses of volcanic rocks in AIMB; data include Zhang, Jing, et al (); Jing, Wang, et al (); Jing, Zhang, et al (); Wang et al (). (a) Total alkali versus silica diagram of Le Bas et al (); (b) Nb/Y–Zr/Ti ratio plot after Winchester and Floyd () and modified by Pearce (); (c) P 2 O 5 /Al 2 O 3 versus K 2 O/Al 2 O 3 diagram (after D'Angelo et al, and Crawford, Meffre, Squire, Barron, & Falloon, ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

Petrology and geochemistry of Carboniferous volcanic rocks from the Awulale Iron Metallogenetic Belt in the West Tianshan Orogen (NW China): Constraints on petrogenesis and tectonic setting

et al. 2018

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The Awulale Iron Metallogenic Belt (AIMB) is the most largest submarine volcanic‐hosted iron metallogenic belts in Tianshan Orogen (NW‐China). The volcanic rocks from the Dahalajunshan Formation, extensively occurred in the western Tianshan Mountains, are mainly hosted‐iron rocks in the AIMB. In combination with published data, our new major and trace elements and isotopic data of volcanic rocks from the AIMB help define their petrogenesis and the tectonic evolution of the western Tianshan. The results indicate that these volcanic rocks belong to shoshonite, high‐K calc‐alkaline, and med‐K series with a small amount of tholeiite series, consisting mainly of basalt, trachybasalt, basaltic andesite, basaltic trachyte andesite, andesite, trachyte andesite, rhyolite, and dacite. They display similar geochemical features such as enrichment in large‐ion lithophile elements (LILE) and light REE (LREE), depletion in heavy REE and high‐field strength elements (HFSE), and prominent Nb‐Ta‐Ti negative anomalies, associated with the subduction‐related magmas. The basaltic and andesitic rocks show a more scattered range of initial 87Sr/86Sr ratios and higher positive εNd(t) values, whereas the acid volcanic rocks exhibit lower positive εNd(t) values with limited initial 87Sr/86Sr ratios. The basaltic rocks were derived from partial melting of phlogopite‐bearing mantle sources in the spinel stability field triggered by the slab‐released fluids of the subducted plate. The andesitic rocks originated by partial melting of mafic migmatites in response to metasomatism formed by early magmas derived from the mantle intruded into the crustal rocks. The acid volcanic rocks are likely derived from the partial melting of components in the lower crust. Therefore, the generation of the volcanic rocks in the AIMB is genetically linked to the geodynamic evolution of the western Tianshan from convergent subduction to collision during the Carboniferous. Both magmatism and hydrothermal processes control the mineralization, and in general, the parental magma of iron mineralization is basaltic and andesitic magma.

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Section: Resultsmentioning

confidence: 99%

Petrology and geochemistry of Carboniferous volcanic rocks from the Awulale Iron Metallogenetic Belt in the West Tianshan Orogen (NW China): Constraints on petrogenesis and tectonic setting

et al. 2018

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“…The Guichon Creek batholith, British Columbia, Canada, was emplaced into the Late Triassic Quesnel terrane sedimentary and volcaniclastic rocks (McMillan et al, 2009;Byrne et al, 2013;D'Angelo et al, 2017). The N-trending 65-× 35-km batholith comprises at least five concentrically zoned cogenetic magmatic units (Fig.…”

Section: Geology Of the Guichon Creek Batholithmentioning

confidence: 99%

“…The margin of the batholith consists of gabbros, diorites, and granodiorites, with more felsic granodiorites to monzonites forming the units that constitute the interior and core of the batholith. The age of intrusive rocks ranges from ~218 to ~207 Ma decreasing inward from margin to core (Ash et al, 2006;D'Angelo et al, 2017;Whalen et al, 2017;Lee et al, 2020). The older margin rocks are related to an initial mafic pulse, followed by two to three later evolved magmatic pulses that formed the interior and core (D'Angelo et al, 2017).…”

Section: Geology Of the Guichon Creek Batholithmentioning

confidence: 99%

“…The age of intrusive rocks ranges from ~218 to ~207 Ma decreasing inward from margin to core (Ash et al, 2006;D'Angelo et al, 2017;Whalen et al, 2017;Lee et al, 2020). The older margin rocks are related to an initial mafic pulse, followed by two to three later evolved magmatic pulses that formed the interior and core (D'Angelo et al, 2017). Multiple centers of porphyry copper-molybdenum mineralization (Fig.…”

Section: Geology Of the Guichon Creek Batholithmentioning

confidence: 99%

“…1) are preferentially hosted in the younger phases at or near the core of the batholith (McMillan et al, 2009;Byrne et al, 2013). The porphyry deposits contain over a billion tonnes (Gt) of ~0.25% Cu (Byrne et al, 2013;D'Angelo et al, 2017;Teck Resources Limited, 2019) with the main centers of mineralization forming the Valley, Lornex, and Highmont deposits, which are dated at 208.4 ± 0.9 Ma (Re-Os age; cf. D'Angelo et al, 2017).…”

Section: Geology Of the Guichon Creek Batholithmentioning

confidence: 99%

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Recognizing Porphyry Copper Potential From Till Zircon Composition: A Case Study From the Highland Valley Porphyry District, South-Central British Columbia

et al. 2021

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The detrital zircons in tills overlying the Guichon Creek batholith, British Columbia, Canada, have trace element concentrations and ages similar to those of zircons from the bedrock samples from which they are interpreted to have been sourced. Rocks from the core of the batholith that host porphyry copper mineralization have distinct zircon compositions relative to the distal, barren margin. We analyzed 296 zircons separated from 12 subglacial till samples to obtain U-Pb ages and trace element compositions. Laser ablation U-Pb ages of the detrital zircons overlap within error with chemical abrasion-thermal ionization mass spectrometry U-Pb ages of the Late Triassic Guichon Creek batholith and confirm that the detrital zircons are likely derived from the batholith. The youngest intrusions of the batholith produced the Highland Valley Copper porphyry deposits and contain distinctive zircons with elevated Eu/EuN* >0.4 attributed to high magmatic water contents and oxidation states, indicating higher porphyry copper potential. Zircon from till samples adjacent to and 9 km down-ice from the mineralized centers have mean Eu/EuN* >0.4, which are indicative of potential porphyry copper mineralization. Detrital zircon grains from more distal up- and down-ice locations (10–15 km) have zircon Eu/EuN* mean values of 0.26 to 0.37, reflecting background values. We conclude that detrital zircon compositions in glacial sediments transported several kilometers can be used to establish the regional potential for porphyry copper mineralization.

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Müller¹,

Groves²

2018

Potassic Igneous Rocks and Associated Gold-Copper Mineralization

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Petrogenesis and Magmatic Evolution of the Guichon Creek Batholith: Highland Valley Porphyry Cu ± (Mo) District, South-Central British Columbia☼

Cited by 28 publications

References 104 publications

Petrology and geochemistry of Carboniferous volcanic rocks from the Awulale Iron Metallogenetic Belt in the West Tianshan Orogen (NW China): Constraints on petrogenesis and tectonic setting

Petrology and geochemistry of Carboniferous volcanic rocks from the Awulale Iron Metallogenetic Belt in the West Tianshan Orogen (NW China): Constraints on petrogenesis and tectonic setting

Recognizing Porphyry Copper Potential From Till Zircon Composition: A Case Study From the Highland Valley Porphyry District, South-Central British Columbia

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