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TitreU-Pb geochronology of the South Mountain Batholith, Nova Scotia
TéléchargerTéléchargement (publication entière)
AuteurBickerton, L; Kontak, D J; Samson, I M; Murphy, J B; Kellett, D A
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; par Rogers, N (éd.); Commission géologique du Canada, Dossier public 8358, 2018 p. 51-55, https://doi.org/10.4095/306421
Année2018
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/306421
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 1, Commission géologique du Canada, Dossier public 8358
Formatspdf
ProvinceNouvelle-Écosse
SNRC11D/05; 11D/12; 11D/13; 20O; 20P; 21A; 21B/01; 21B/08; 21B/09
Lat/Long OENS -66.5000 -63.5000 45.0000 43.2500
Sujetsgisements minéraux; prospection minière; potentiel minier; gisements porphyriques; gîtes polymétalliques; tungstène; étain; molybdène; or; cuivre; genèse des minerais; contrôles des minerais; minéralisation; évolution tectonique; cadre tectonique; intrusions; batholites; plutons; filons; magmatisme; mise en place; cristallisation; géologie du substratum rocheux; lithologie; roches ignées; roches plutoniques; roches granitiques; leucogranites; monzogranites; granodiorites; biotite; roches volcaniques; roches sédimentaires métamorphosées; datation radiométrique; datation au uranium-plomb; zircon; analyses par microscope électronique; Orogène Appalachien; Zone de Meguma ; Batholite de South Mountain ; Formation de White Rock ; Supergroupe de Meguma ; Pluton d'East Dalhousie ; Pluton de Davis Lake ; géologie économique; tectonique; géochronologie; Phanérozoïque; Paléozoïque; Carbonifère; Dévonien; Silurien; Ordovicien
Illustrationsgeoscientific sketch maps; location maps
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeGestion de la connaissance de IGC, Initiative géoscientifique ciblée (IGC-5)
ProgrammeSystèmes porphyriques, Initiative géoscientifique ciblée (IGC-5)
ProgrammeCRSNG Conseil de recherches en sciences naturelles et en génie du Canada
Diffusé2018 01 19
Résumé(disponible en anglais seulement)
The South Mountain Batholith (SMB) is a composite peraluminous intrusion in southwestern Nova Scotia and the largest granitoid body in the Appalachian Orogen. The batholith comprises early stage biotite-granodiorite to biotite-monzogranite and a later stage of leucomonzogranite to leucogranite plutons that are associated with numerous sub-economic to economic polymetallic (Sn, W, Mo, Cu, Ta, Nb, Zn) deposits, including East Kemptville, a past-producing Sn-Zn-Cu-Ag(-In) deposit.
The timing and duration of emplacement for intrusive phases that make up the SMB remain poorly constrained. The U-Pb zircon age results from Sensitive High-Resolution Ion Microprobe (SHRIMP) analyses in this study constrain the emplacement age of the early and later phases across the SMB, as well as provide insight into mineral potential in the intrusive complex. Zircons from five plutons in the batholith were analyzed; including one early phase granodiorite, to compliment previous U-Pb zircon dates from similar phases (ca. 381-373 Ma), and four late phase leucogranitic plutons. Results indicate the early granodiorite to be 380.9 ± 3.0 Ma and the later leucogranites to range between 376.0 ± 3.0 Ma and 372.8 ± 3.0 Ma. The ca. 15 Ma from oldest to youngest crystallization ages mark the beginning and end of SMB construction. Due to overlapping errors, more precise dating is necessary to determine whether the late stage polymetallic-mineralized plutons intruded as a discrete magmatic event to the early stage plutons, or as part of a protracted Late Devonian magmatism in the region.
GEOSCAN ID306421