| Titre | Geochronology of northern Hogem Batholith, Quesnel Terrane, north-central British Columbia |
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| Auteur | Jones, G; Ootes, L; Schiarizza, P; Milidragovic, D ; Friedman, R; Camacho, A; Luo, Y; Vezinet, A; Pearson, D G |
| Source | Geological fieldwork 2020: a summary of field activities and current research; British Columbia Geological Survey Paper 2021-01, 2021 p. 37-56  Accès ouvert |
| Liens | Online - En ligne
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| Image |  |
| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200583 |
| Éditeur | British Coulmbia Ministry of Energy, Mines and Petroleum Resources |
| Document | publication en série |
| Lang. | anglais |
| Media | en ligne; numérique |
| Formats | pdf |
| Province | Colombie-Britannique |
| SNRC | 93N/03; 93N/04; 93N/05; 93N/06; 93N/11; 93N/12; 93N/13; 93N/14; 94C/03; 94C/04; 94C/05; 94C/06; 94C/11; 94C/12; 94C/13; 94C/14 |
| Lat/Long OENS | -126.0000 -125.0000 57.0000 55.0000 |
| Sujets | potentiel minier; gisements minéraux; gisements porphyriques; cuivre; or; datation radiométrique; datation au uranium-plomb; datation argon-argon; antécédents tectoniques; magmatisme; intrusions; mise en
place; cristallisation; analyse par spectromètre de masse; géochimie des roches totales; géologie du substratum rocheux; lithologie; roches ignées; roches intrusives; Batholite d'Hogem ; Terrane de Quesnel ; Cordillère canadienne; Terrane de Stikine
; géologie économique; géochronologie; géochimie; Sciences et technologie; Nature et environnement; Phanérozoïque; Mésozoïque; Crétacé; Jurassique; Trias |
| Illustrations | cartes de localisation; cartes géolscientiques généralisées; diagrammes ternaires; graphiques; tableaux; diagrammes Concordia; graphique à barres; cartes géochronologiques |
| Programme | Division CGC Pacifique |
| Diffusé | 2021 01 18 |
| Résumé | (disponible en anglais seulement)
New and previously unpublished geochronological data that complement bedrock mapping and geochemical studies in northern Hogem batholith indicate punctuated
emplacement of four distinct intrusive suites during a protracted (ca. 80 Ma) interval, from 207 to 128 Ma. U-Pb crystallization ages include new zircon (by LA-ICP-MS), previously unpublished legacy zircon and titanite (by ID-TIMS), and published
zircon (by CA-TIMS). Amphibole, biotite, and muscovite 40Ar/39Ar step-heating results provide magmatic cooling ages and post-deformation cooling ages. The Thane Creek suite, composed of mostly metaluminous diorite to quartz monzodiorite with lesser
hornblendite, intruded host Nicola Group strata between 207 and 194 Ma. The Duckling Creek suite consists of alkaline biotite clinopyroxenite and syenite that intruded the Thane Creek suite between 182 and 175 Ma. The Osilinka suite, represented by a
weakly peraluminous leucocratic granite body, yielded a maximum emplacement age of ca. 160 Ma. The Mesilinka suite consists of metaluminous tonalite and weakly peraluminous granodiorite to granite, with interpreted crystallization ages ranging from
135 to 128 Ma. Bedrock mapping and geochronologic results from this study indicate that northern Hogem batholith contains prospective rocks comparable to those that host the Lorraine and other deposits south of the present study area. The Hogem
batholith is relatively unique in the Canadian Cordillera because it contains a remarkable evolution of punctuated Upper Triassic to Lower Cretaceous intrusive suites that are compositionally and chemically diverse. A new discovery is that the
Mesilinka suite (Lower Cretaceous) intruded during a Cordilleran-wide magmatic lull. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Le batholite de Hogem est un gros corps 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), représentée par quatre suites intrusives: la suite Thane Creek (207-194 Ma), la suite Duckling Creek (182-175 Ma), la suite Osilinka (vers 160 Ma), et la suite Mesilinka
(135-128 Ma). Cet article présente le résumé des données géochronologiques disponibles pour le batholite de Hogem nord. |
| GEOSCAN ID | 327834 |
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