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TitleFluid evolution and pressure regimes in the Campbell - Red Lake gold deposit, Red Lake mine trend, Red Lake, Ontario: fluid-inclusion evidence for a protracted, highly dynamic hydrothermal system
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AuthorChi, G; Dubé, B; Williamson, K
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C28, 2003, 16 pages, https://doi.org/10.4095/214832 (Open Access)
Image
Year2003
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in Geological Survey of Canada; (2004). Current Research 2003, January-December 2003, Geological Survey of Canada, Current Research no. 2003, ed. ver. 2
File formatpdf
ProvinceOntario
NTS52N/04
AreaRed Lake; Campbell
Lat/Long WENS-94.0000 -93.5000 51.2500 51.0000
Subjectshydrogeology; economic geology; fluid inclusions; pressure; hydrothermal systems; gold; mineralization; fluid mechanics; pore pressures; petrography; Campbell Mine; Red Lake Mine; microthermometry
Illustrationssketch maps; tables; ternary diagrams; photomicrographs; graphs
Released2003 12 01
AbstractFluid inclusions were studied in quartz grains assigned to pre -, syn -, and post - main-stage gold mineralization (Q1, Q2, and Q3) in the Campbell-Red Lake gold deposit. Carbonic fluid inclusions, dominated by CO2 with variable amounts of CH4 andN2, are predominant in all stages. Aqueous inclusions are rare in Q1 and Q2, but common in Q3. Using homogenization temperatures of 350º, 390º and 320ºC for
aqueous inclusions in Q1, Q2, and Q3 respectively, fluid pressures of up to 2706, 2574, and 1000 bars (corresponding to lithostatic loads of 10.2, 9.7 and 3.8 km) have been obtained from the isochores of carbonic fluid inclusions. Large fluctuations in fluid pressure within individual stages are attributed to variation between lithostatic and subhydrostatic regimes in relation to structural evolution. The extreme scarcity of aqueous inclusions in Q1 and Q2 suggests a 'dry' (water-deficient) carbonic-rich hydrothermal system with CH4 and N2, whose gold transporting capacity needs further examination.
GEOSCAN ID214832