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TitreMafic intrusive rocks from the Bird River intrusive suite, Bird River greenstone belt, southeast Manitoba
TéléchargerTéléchargement (publication entière)
AuteurBécu, V; Houlé, M G; McNicoll, V J; Yang, E M; Gilbert, H P
SourceTargeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models; par Ames, D E (éd.); Houlé, M G (éd.); Commission géologique du Canada, Dossier public 7856, 2015 p. 49-60, https://doi.org/10.4095/296678
Année2015
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/296678
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Ames, D E; Houlé, M G; (2015). Targeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models, Commission géologique du Canada, Dossier public 7856
Formatspdf
ProvinceManitoba
SNRC52L/05; 52L/12
Lat/Long OENS -96.0000 -95.5000 50.7500 50.3333
Sujetsétablissement de modèles; nickel; platine; chrome; genèse des minerais; métallogénie; roches mafiques; roches intrusives; roches intrusives mafiques; lithologie; chromite; géochimie des roches totales; analyses des roches totales; datations au uranium-plomb; datations au zircon; Ceinture de Bird River Greenstone ; Province de Superior ; minéraux métalliques; pétrologie ignée et métamorphique; géochimie; géochronologie
ProgrammeÉtude des gîtes magmatiques de Ni-Cu-EPG, Initiative géoscientifique ciblée (IGC-4)
Diffusé2015 06 22
Résumé(disponible en anglais seulement)
This study presents new field, petrographic, and geochemical observations for the Coppermine Bay and Euclid Lake intrusions of the Bird River greenstone belt, allowing for comparison with the Mayville and other Bird River sill intrusions in southeast Manitoba. The mafic-dominated Coppermine Bay intrusion, located in the westernmost part of the southern arm of the Bird River greenstone belt, is texturally and petrographically similar to the mafic part of the mafic-ultramafic Euclid Lake intrusion, located 34 km to the northeast, at the northeast margin of the belts northern arm. The mafic components of the Coppermine Bay and Euclid Lake intrusions possess textural, compositional, and geochemical similarities with the Mayville and with mafic parts of other Bird River sill intrusions. Combined with geochemical and geochronological investigations, a petrogenetic linkage of these mafic-ultramafic intrusions is proposed through a widespread Neaoarchean Bird River magmatic event at ca. 2743 Ma, referred to as the Bird River intrusive suite. TiO2 and Zr contents, as well as rare earth elements profiles and plagioclase chemistry, may be useful geochemical tools to successfully discriminate and identify potentially fertile intrusions beyond traditionally
explored sectors in the Bird River greenstone belt.
GEOSCAN ID296678