| Titre | Gold mineralization during greenhouse gas fixation: a booklet summary of research on Au-bearing listwanite in the Atlin area, northwestern British Columbia |
| Télécharger | Téléchargements |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Hansen, L D; Dipple, G M; Anderson, R G |
| Source | Commission géologique du Canada, Dossier public 5074, 2006, 7p., https://doi.org/10.4095/221819  Accès ouvert |
| Image |  |
| Année | 2006 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/221819 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Colombie-Britannique |
| SNRC | 104N/12 |
| Région | Atlin; Atlin Lake |
| Lat/Long OENS | -134.0000 -133.5000 59.7500 59.5000 |
| Sujets | or; minéralisation; serpentinites; gaz carbonique; altération; carbonate; roches ignées; roches intrusives; roches volcaniques; roches ultramafiques; pétrographie; analyses géochimiques; magnétisme;
gisements minéraux; genèse des gîtes minéraux; traitement chimique; processus chimique; magnésite; serpentine; talc; quartz; datation radiométrique; études des isotopes stables; isotopes de carbone; régions émettrices; perméabilité; susceptibilité
magnétique; établissement de modèles; temperature; basaltes; brèches; accretion; métabasaltes; dunites; harzburgites; intrusions; dacites; diabases; porphyres; Holocène; dépôts glaciaires; hydromagnésite; failles; fractures; décollement; obduction;
chromite; muscovite; fluage; olivine; oxydes; prospection minière; méthodes d'exploration; datation argon-argon; Assemblage d'Atlin Ophiolitic ; Batholite de Fourth Of July ; Entreposage; géologie économique; pétrologie ignée et métamorphique;
géochimie; géochronologie; géologie des dépôts meubles/géomorphologie; Nature et environnement; Phanérozoïque; Cénozoïque; Quaternaire; Mésozoïque; Trias |
| Illustrations | dessins; croquis cartographiques; photographies; organigrammes; photomicrographies; blocs-diagrammes; diagrammes stéréographiques tournant de wulff; diagrammes ternaires; graphiques |
| Programme | Réduire la vulnérabilité du Canada au
changement climatique |
| Programme | CRSNG Conseil de recherches en sciences
naturelles et en génie du Canada |
| Programme | Environnement Canada, Direction générale des Aspects environnementaux du pétrole, du gaz et de l'énergie,
Programme de financement |
| Programme | Le Fonds d'action pour
le changement climatique (FACC) |
| Diffusé | 2006 03 01; 2008 10 29 |
| Résumé | (disponible en anglais seulement)
Listwanite (carbonate-altered serpentinite) is commonly spatially associated with gold mineralization; it also represents a natural analogue to mineral
carbonation, a type of carbon dioxide sequestration. Our studies have resulted in a better understanding of listwanite associated lode-gold deposits and will aid in the design of industrial processes aimed at permanently and safely storing
anthropogenic carbon dioxide. Mapping and sampling at Atlin, BC shows that listwanite-alteration is localized along a penetrative fracture system within the ultramafic body and extends up to tens of metres into intact wallrock. Petrography and
geochemistry indicate carbonate-alteration proceeded via a three-stage reaction sequence. Serpentinite was converted to magnesite + serpentine which was then converted to magnesite + talc and finally to magnesite + quartz. The overall mineral
transformation is the same as proposed industrial carbonation reactions and was accomplished without the alteration of non-volatile chemical species. Geochronology and stable isotopes have helped define the source of carbon dioxide and the
constrained the timing and duration of the alteration. Volume changes associated with alteration may play a role in the generation of permeability in advance of carbonation reaction fronts. ln addition, we have modeled magnetic susceptibility as a
proxy for listwanite-alteration that has aided in the mapping out of the permeability structure of these systems. |
| GEOSCAN ID | 221819 |
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