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TitleAn integrated geological, geochemical, and geophysical investigation of uranium metallogenesis in selected granitic plutons of the Miramichi Anticlinorium, New Brunswick
AuthorHassan, H H; McAllister, A L
SourceGeological Survey of Canada, Paper no. 91-15, 1992, 147 pages, (Open Access)
PublisherDepartment of Energy, Mines and Resources Canada
Mediapaper; on-line; digital
File formatpdf
ProvinceNew Brunswick
NTS21O/02; 21J/10
AreaLong Lake; Clearwater Brook; Burnthill Brook; Rocky Brook
Lat/Long WENS -66.9500 -66.5000 47.1000 46.5333
Subjectsgeochemistry; geophysics; igneous and metamorphic petrology; mineralization; plutonic rocks; granites; igneous rocks; gravity surveys, ground; magnetic surveys, ground; magnetic interpretations; magnetic surveys; v l f surveys, ground; v l f interpretations; v l f surveys; i p surveys, ground; i p interpretations; i p surveys; geochemical surveys; geophysical surveys; geophysical interpretations; lake sediment geochemistry; stream sediment geochemistry; soil geochemistry; till geochemistry; water geochemistry; analyses; trace element analyses; geochemical analyses; bouguer anomalies; total field magnetics; uranium geochemistry; tungsten geochemistry; molybdenum geochemistry; copper geochemistry; lead geochemistry; zinc geochemistry; manganese geochemistry; iron geochemistry; mineral occurrences; modelling; exploration guidelines; gamma-ray surveys; whole rock analyses; metallogeny; norm analyses; uranium; thorium; potassium; North Pole Pluton; Miramichi Anticlinorium; Burnthill Granite; Dungarvon Granite; Trout Brook Granite; Rocky Brook Granite; Mount Elizabeth Stock; Miramichi Stock; Lost Lake Granite; Redstone Mountain Granite; Juniper Barren Granite; Phanerozoic; Paleozoic; Carboniferous; Devonian; Ordovician; Cambrian
Illustrationsgeological sketch maps; ternary diagrams; geochronological charts; tables; geochemical plots; radiometric profiles; cross-sections; bar graphs; plots; models
ProgramCanada-New Brunswick Mineral Development Agreement, 1984-1989
Released1992 07 01; 2016 09 12
AbstractIntegrated geological, geochemical, and geophysical data for the posttectonic granitic rocks of the North Pole, Burnthill, Dungarvon, Trout Brook, and Rocky Brook plutons and surrounding areas were examined to assess their potential for uranium mineralization. Geological, geochemical, and geophysical criteria that are thought to be useful guides for uranium exploration were also established for the host granites.
The granitic plutons were emplaced discordantly, late in the tectonomagmatic sequence and at shallow depths within the metasedimentary rocks of the Miramichi Anticlinorium. Geochemically, the host granites are highly evolved (Si02 > 75 wt. %), peraluminous and have strong similarities with ilmenite-series 'S-type' and 'A-type' granitoids. Uranium occurrences are spatially and perhaps temporally associated with late-phase differentiates of the plutons where elevated levels of other lithophile elements such as Sn, W, Mo, and F were also detected. Geophysically, the granitic plutons are associated with distinctively high aeroradiometric eU, eTh, and K anomalies that coincide with strong negative Bouguer anomalies and low magnetic values.
Conceptual models involving magmatic and hydrothermal processes have been adopted to explain the concentration of uranium and associated metals in the granitic plutons.