| Titre | Preliminary zircon geochemistry of the northern Hogem Batholith, Quesnel terrane, north-central British Columbia (Parts of NTS 093M/16, 093N/13, 14, 094C/03-06, 094D/01, 08) |
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| Auteur | Jones, G O; Pearson, D G; Vezinet, A; Luo, Y; Stern, R A; Milidragovic, D ; Ootes, L |
| Source | Geoscience BC, summary of activities 2020: minerals; Geoscience BC, Report 2021-01, 2021 p. 105-120  Accès ouvert |
| Liens | Online - En ligne
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| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200542 |
| Éditeur | Geoscience BC |
| Document | publication en série |
| Lang. | anglais |
| Media | en ligne; numérique |
| Formats | pdf |
| Province | Colombie-Britannique |
| SNRC | 93M/16; 93N/13; 93N/14; 94C/03; 94C/04; 94C/05; 94C/06; 94D/01; 94D/08 |
| Région | Osilinka River; Tutizzi Lake; Ominica River |
| Lat/Long OENS | -127.0000 -125.0000 57.0000 55.7500 |
| Sujets | potentiel minier; gisements minéraux; gisements porphyriques; cuivre; or; molybdène; genèse des minerais; minéralisation; zircon; etudes isotopiques; hafnium; lutecium; isotopes d'oxygène; analyses
géochimiques; géochimie des éléments en trace; europium; titane; levés géophysiques; levés magnétiques; levés radiométriques; pétrogenèse; magmatisme; dynamique des fluides; intrusions; géologie du substratum rocheux; lithologie; roches ignées;
roches intrusives; diorites; monzodiorites; hornblendites; syenites; roches volcaniques; tufs volcaniques; picrites; Batholite d'Hogem ; Terrane de Quesnel ; Cordillère canadienne; Terrane de Stikine ; Groupe de Stuhini ; géologie économique;
géochimie; géophysique; Nature et environnement; Sciences et technologie; Phanérozoïque; Mésozoïque; Crétacé; Jurassique |
| Illustrations | cartes de localisation; tableaux; graphiques |
| Programme | Division CGC Pacifique |
| Diffusé | 2021 01 18 |
| Résumé | (disponible en anglais seulement)
In 2018, Geoscience BC released the Search III airborne magnetic and radiometric data for the area between the Lorraine and Kemess porphyry deposits (Figures 1
and 2; Madu and Ballantyne, 2018). Following that, the British Columbia Geological Survey initiated a three-year mapping project in order to update the bedrock geology in the southern part of the Search III footprint, with a focus on the northern
Hogem batholith (Figures 1 and 2; Ootes et al., 2019, 2020a, b). As part of the bedrock mapping, this project was initiated to study the details of magma genesis in the batholith and provide insights into the petrogenesis of plutons that are known to
host porphyry style Cu-Au (±Mo) mineralization. The Thane Creek suite (ca. 196 Ma) hosts Cu-Au porphyry occurrences (e.g., Cathedral prospect) and the Duckling Creek suite (ca. 180 Ma) hosts the Lorraine Cu-Au deposit, amongst other prospects and
occurrences (Bath et al., 2014; Devine et al., 2014). This report presents an introduction to a multi-isotopic study from these two intrusive suites. Interpretation of crystallization ages has been previously presented (Bath et al., 2014; Devine et
al., 2014; Ootes et al., 2020b) and the focus of this contribution is the integration of multi-isotopic and trace element study of zircon, and the potential of this data for understanding magmatic fertility. Porphyry deposits typically have
alteration haloes that are destructive to host-rocks (e.g., Byrne et al., 2016). This report focusses on magmatic phases that are associated with porphyry-style mineralization, but sampling was conducted away from mineralized or heavily altered
zones. This provides a background perspective on igneous petrogenesis and regional insights into the controls of magma fertility (versus deposit scale). The data collected for this study was collected from single zircon crystals and includes U-Pb,
Lu-Hf ¬, delta-18O, and trace elements (TE). The U-Pb allows for crystallization age determinations, Lu-Hf provides insight into the juvenile or contaminated nature of the parental magma and its source, delta-18O establishes whether the magmatic
source been recycled, and the TE data allow estimates of temperature and oxidation state during crystallization. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Le batholite de Hogem est un gros corps igné intrusif composite situé dans le terrane de Quesnel dans le centre-nord de la Colombie-Britannique.
Le batholite a une longue histoire de mise en place (> 90 millions d'années) et contient de la minéralisation porphyrique Cu-Au dans deux des suites intrusives les plus anciennes, les suites du Thane Creek et Duckling Creek. De nouvelles données
géochronologiques et isotopiques, présentées ici, aident à résoudre la longue histoire magmatique du batholite de Hogem. |
| GEOSCAN ID | 327593 |
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