| Title | Carbonate-hosted deposits (Mississippi Valley-type, magnesite, and REE-F-Ba) of the southeastern
Canadian Cordillera: a review and isotopic data comparison |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Paradis, S ;
Simandl, G J; Drage, N; D'Souza, R J; Kontak, D J; Waller, Z |
| Source | Targeted Geoscience Initiative 5: volcanic- and sediment-hosted massive-sulfide deposit genesis and exploration methods; by Peter, J M (ed.); Gadd, M G (ed.); Geological Survey of Canada, Bulletin 617, 2022 p. 39-87, https://doi.org/10.4095/327995  Open Access |
| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative 5: volcanic- and sediment-hosted massive-sulfide deposit genesis and exploration methods |
| Related | NRCan photo(s) in this publication |
| File format | pdf |
| Province | British Columbia; Alberta |
| NTS | 82F; 82G; 82J; 82K; 82N; 82O |
| Area | Rocky Mountains |
| Lat/Long WENS | -118.0000 -114.0000 52.0000 48.0000 |
| Subjects | economic geology; igneous and metamorphic petrology; mineralogy; geochemistry; geochronology; Science and Technology; Nature and Environment; mineral exploration; exploration guidelines; mineral
deposits; Mississippi Valley deposits; sedimentary ore deposits; base metals; lead; zinc; magnesite; fluorine; barium; ore mineral genesis; mineralization; ore controls; structural controls; continental margins; sedimentary facies; tectonic setting;
plate margins; rifting; deformation; metamorphism; hydrothermal systems; geological history; host rocks; bedrock geology; lithology; sedimentary rocks; carbonates; dolostones; clastics; petrographic analyses; fluid inclusions; isotopic studies;
oxygen isotopes; carbon isotopes; sulphur isotope ratios; strontium strontium ratios; lead isotope ratios; thermal analyses; fluid dynamics; paragenesis; replacement deposits; dolomites; sulphides; sulphate; pyrite; radiometric dating; paleomagnetic
ages; Canadian Cordillera; Foreland Belt; Cathedral Escarpment; Rocky Mountain Trench; Purcell Anticlinorium; Kootenay Arc; Ancestral North America; Monarch Deposit; Kicking Horse Deposit; Shag Deposit; Hawk Creek Deposit; Boivin Deposit; Munroe
Deposit; Alpine Deposit; Oldman Deposit; Mount Brussilof Deposit; Rock Canyon Creek Deposit; Cathedral Formation; Steven Formation; Eldon Formation; Waterfowl Formation; Palliser Formation; McKay Group; Cedared Formation; Burnais Formation; Rodinia;
Pangea; Laramide Orogeny; Phanerozoic; Paleozoic; Devonian; Ordovician; Cambrian |
| Illustrations | location maps; geoscientific sketch maps; stratigraphic charts; tables; photographs; photomicrographs; plots; geochronological charts |
| Program | Targeted Geoscience Initiative (TGI-5) Volcanic and sedimentary systems - volcanogenic massive sulphide ore systems |
| Released | 2022 01 27; 2022 11 17 |
| Abstract | The Mississippi Valley-type, magnesite, and REE-F-Ba deposits in the southeastern Canadian Cordillera are in the weakly deformed/metamorphosed Paleozoic carbonate platform of the Rocky Mountains. Most
are hosted in dolostones of the middle Cambrian Cathedral, upper Cambrian Jubilee, and Upper Devonian Palliser formations and spatially associated with hydrothermal dolomite. They occur along structurally controlled facies transitions between the
shallow-water carbonate platform and deeper water basin rocks of the Paleozoic continental margin. Their location and morphology reflect episodic rifting along the Paleozoic margin. The carbonate protolith was replaced by fine-grained 'replacive
dolomite' followed by several stages of coarser saccharoidal, sparry, and saddle dolomites and sulfides replacing dolostone and filling open spaces. The 87Sr/86Sr, delta-18O, delta-13C, and fluid-inclusion data are consistent with high-temperature
fluids interacting with host rocks and show influence of adjacent or underlying siliciclastic rocks. The large range of delta-34S values of sulfides suggests that thermochemical sulfate reduction of seawater sulfate was the main sulfur-reducing
process, but bacterial sulfate reduction also occurred locally. Lead isotopes suggest a mixing trend involving highly radiogenic and non-radiogenic end members. These observations are consistent with hydrothermal fluids replacing protoliths,
precipitating sulfides, and possibly REE-F-Ba mineralization. |
| Summary | (Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is a collaborative federal geoscience program that provides industry with the next generation of geoscience
knowledge and innovative techniques to better detect buried mineral deposits, thereby reducing some of the risks of exploration. This contribution summarizes the results of a 5-year study of multiple mineral deposit types: polymetallic hyper-enriched
black shale; sedimentary exhalative Pb-Zn; carbonate-hosted Pb-Zn, magnesite; fracture-controlled replacement Zn-Pb, rare-earth element-F-Ba; and volcanogenic massive sulfides. Studies employed field geology, combined with geochemical
(lithogeochemistry, stable and radiogenic isotopes, fluid inclusions, and mineral chemistry) and geophysical (rock properties, magnetotelluric, and seismic) methods. Collectively, the research provides advanced genetic and exploration models for
volcanic- and sedimentary-hosted base-metal deposits, together with new laboratory, geophysical, and field techniques. |
| GEOSCAN ID | 327995 |
|
|