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TitreLaser ablation-inductively coupled plasma-mass spectrometric analysis of fluid inclusions from the Windy Craggy Cu-Co-Au volcanogenic massive sulphide deposit: method development and preliminary results
TéléchargerTéléchargement (publication entière)
AuteurSchmidt, M A; Peter, J M; Jackson, S E; Yang, Z; Leybourne, M I; Layton-Mathews, D
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; par Rogers, N (éd.); Commission géologique du Canada, Dossier public 8358, 2018 p. 243-252, https://doi.org/10.4095/306480
Année2018
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/306480
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
Sujetsgisements minéraux; prospection minière; potentiel minier; cuivre; cobalt; or; gîtes volcanogènes; gîtes sulfureux; genèse des minerais; minéralisation; contrôles des minerais; méthodes analytiques; analyse par spectromètre de masse; inclusions fluides; magmatisme; salinité; antecedents thermiques; temperature; analyses des éléments en trace; analyses pétrographiques; Dépôt de Windy Craggy ; Ceinture d'Insular ; Terrane d'Alexander ; Méthodologie; Traitement des données; géologie économique; géochimie; Phanérozoïque; Paléozoïque; Précambrien
Illustrationstables; photomicrographs; histograms; plots
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeGestion de la connaissance de IGC, Initiative géoscientifique ciblée (IGC-5)
ProgrammeSystèmes volcaniques et sédimentaires, Initiative géoscientifique ciblée (IGC-5)
Diffusé2018 01 19
Résumé(disponible en anglais seulement)
There is increasing recognition that there is a variable magmatic component to mineralizing fluids in volcanogenic massive sulphide (VMS) deposit formation. A previous fluid inclusion study conducted on the Windy Craggy Cu-Co-Au deposit in northwestern British Columbia documented primary inclusion fluids salinities that are higher than typical VMS fluids. The previous study concluded that the high salinity indicates a magmatic contribution to the ore-forming system. This makes Windy Craggy an ideal study location to test if there is in fact a magmatic influence on the fluids and to quantify that contribution. Preliminary results of this study show fluids consistent in salinity and temperature with those observed in the previous study. Fluids with salinities between 6.2 and 12.2 weight % NaCl equivalent are documented. Laser ablation ICP-MS analysis of these inclusions detects Na, K, Ca, Cu, Sr, Sn, Sb, Ba and Pb as well as trace elements of potential magmatic origin, including Au, W, Sn, In and Bi. Due to the multiple possible sources of Sn, we will be focusing on other potential magmatic elements such as Au, Bi and In as the study progresses. The small number of samples analyzed to date precludes us from making definitive conclusions. However, the detection of some potential magmatic elements in 17 inclusions is promising.
GEOSCAN ID306480