| Titre | Accessory mineral thermobarometry, trace element chemistry, and stable O isotope systematics, Mooshla Intrusive Complex (MIC), Doyon-Bousquet-LaRonde mining camp, Abitibi greenstone belt, Québec |
| Télécharger | Téléchargement (publication entière) |
| |
| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Neyedley, K; Hanley, J J; Zajacz, Z; Fayek, M |
| Source | Targeted Geoscience Initiative 5: grant program final reports (2018-2020); par Targeted Geoscience Initiative Coordination Office; Commission géologique du Canada, Dossier public 8755, 2021 p. 149-168,
https://doi.org/10.4095/328986  Accès ouvert |
| Année | 2021 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/328986 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Targeted
Geoscience Initiative 5: grant program final reports (2018-2020) |
| Formats | pdf; xlsx (Microsoft® Excel®) |
| Province | Québec |
| SNRC | 32D/02NE; 32D/07SE |
| Lat/Long OENS | -78.5903 -78.5011 48.2822 48.2489 |
| Sujets | prospection minière; gisements minéraux; or; cuivre; gîtes volcanogènes; gîtes sulfureux; gisements filoniens; genèse des minerais; minéralisation; thermobarométrie; analyses thermiques; conditions de
pression-température; cristallisation; oxydation; etudes isotopiques; isotopes d'oxygène; ceintures de roche verte; cadre tectonique; magmatisme; intrusions; mise en place; système hydrothermal; dynamique des fluides; géochimie des éléments en trace;
analyses de textures; modèles; zircon; titanite; quartz; rutile; anhydrite; épidote; analyse par spectromètre de masse; analyses pétrographiques; cadre tectonique; Archéen; Camp minier de Doyon-Bousquet-Laronde; Ceinture d'Abitibi Greenstone ;
Formation de Bousquet ; géologie économique; minéralogie; géochimie; tectonique; Sciences et technologie; Nature et environnement; Précambrien |
| Illustrations | cartes géolscientiques généralisées; photographies; photomicrographies; tableaux; graphiques; diagrammes de phases |
| Programme | Initiative géoscientifique ciblée (IGC-5) Gestion de la connaissance de IGC |
| Diffusé | 2021 10 27 |
| Résumé | (disponible en anglais seulement)
The Mooshla Intrusive Complex (MIC) is an Archean polyphase magmatic body located in the Doyon-Bousquet-LaRonde (DBL) mining camp of the Abitibi greenstone
belt, Québec, that is spatially associated with numerous gold (Au)-rich VMS, epizonal 'intrusion-related' Au-Cu vein systems, and shear zone-hosted (orogenic?) Au deposits. To elucidate the P-T conditions of crystallization, and oxidation state of
the MIC magmas, accessory minerals (zircon, rutile, titanite) have been characterized using a variety of analytical techniques (e.g., trace element thermobarometry). The resulting trace element and oxythermobarometric database for accessory minerals
in the MIC represents the first examination of such parameters in an Archean magmatic complex in a world-class mineralized district.
Mineral thermobarometry yields P-T constraints on accessory mineral crystallization consistent with the expected
conditions of tonalite-trondhjemite-granite (TTG) magma genesis, well above peak metamorphic conditions in the DBL camp. Together with textural observations, and mineral trace element data, the P-T estimates reassert that the studied minerals are of
magmatic origin and not a product of metamorphism. Oxygen fugacity constraints indicate that while the magmas are relatively oxidizing (as indicated by the presence of magmatic epidote, titanite, and anhydrite), zircon trace element systematics
indicate that the magmas were not as oxidized as arc magmas in younger (post-Archean) porphyry environments.
The data presented provides first constraints on the depth and other conditions of melt generation and crystallization of the MIC. The P-T
estimates and qualitative fO2 constraints have significant implications for the overall model for formation (crystallization, emplacement) of the MIC and potentially related mineral deposits. |
| Sommaire | (Résumé en langage clair et simple, non publié)
L'Initiative des géosciences ciblées (IGC) est un programme fédéral collaboratif. Ce programme fournit à l'industrie ce qui est requis pour la
prochaine génération des connaissances géoscientifiques et des techniques novatrices. Le résultat est l'identification des dépôts de minéraux en profondeur. Ce compendium est le résultat des récipiendaires des subventions d'IGC 2018-2020. |
| GEOSCAN ID | 328986 |
|
|