| Title | Rare-earth element content of carbonate minerals in sediment-hosted Pb-Zn deposits, southern Canadian Rocky Mountains |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Simandl, G J; D'Souza, R J; Paradis, S ; Spence, J |
| 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. 165-201, https://doi.org/10.4095/328001
 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 |
| File format | pdf |
| Province | British Columbia; Alberta |
| NTS | 82F; 82G; 82J; 82K; 82N; 82O; 93I; 93J; 93K; 93N; 93O; 93P; 94A; 94B; 94C; 94F; 94G; 94H |
| Area | Rocky Mountains |
| Lat/Long WENS | -118.0000 -114.0000 52.0000 48.0000 |
| Lat/Long WENS | -126.0000 -120.0000 58.0000 54.0000 |
| Subjects | economic geology; tectonics; geochemistry; mineralogy; Science and Technology; Nature and Environment; mineral exploration; exploration methods; mineral deposits; Mississippi Valley deposits; sulphide
deposits; sedimentary ore deposits; replacement deposits; base metals; zinc; lead; ore mineral genesis; mineralization; ore controls; structural controls; mass spectrometer analysis; geochemical analyses; geochemical anomalies; bedrock geology;
lithology; sedimentary rocks; carbonates; dolostones; structural features; fractures; tectonic history; metamorphism; diagenesis; burial history; fluid migration; fluid dynamics; crystallization; recrystallization; metallogeny; Canadian Cordillera;
Foreland Belt; Kootenay Arc; North American Craton; Munroe Deposit; Shag Deposit; Monarch Deposit; Kicking Horse Deposit; Coral Deposit; Robb Lake Deposit; Reeves MacDonald Deposit; Jersey Emerald Deposit; HB Deposit; Abbott-Wagner Deposit; Pend
Oreille (Yellowhead) Deposit; Pend Oreille (Josephine) Deposit; Duncan Deposit; Phanerozoic; Paleozoic; Devonian; Ordovician; Cambrian |
| Illustrations | location maps; geoscientific sketch maps; tables; photomicrographs; plots |
| Program | Targeted Geoscience Initiative (TGI-5) Volcanic and sedimentary systems - volcanogenic massive sulphide ore systems |
| Released | 2022 01 27; 2022 11 17 |
| Abstract | Paleozoic platform carbonate rocks of the Rocky Mountains host Mississippi Valley-type (MVT), magnesite, barite, and REE-barite-fluorite deposits. Farther west, platform carbonate rocks of the Kootenay
Arc host MVT and fracture-controlled replacement (FCR) deposits. This is the first systematic LA-ICP-MS study of carbonates in MVT and FCR deposits. We investigated seven MVT deposits in the Rocky Mountains, and five MVT deposits in the Kootenay Arc.
None of the post-Archean Australian shale (PAAS)-normalized REE profiles show light REE (LREE) depletion and strong negative Ce anomalies characteristic of modern seawater: some profiles are nearly flat; others show depletion in LREE similar to
seawater but without negative Ce anomalies; others are middle REE enriched. Carbonates with a strong positive Eu anomaly precipitated from or interacted with different fluids than carbonates with flatter profiles without a strong positive Eu anomaly.
REE signatures reflect crystallization conditions of primary carbonates, and crystallization and re-equilibration conditions of carbonates with ambient fluids during diagenesis, deep burial, and/or metamorphic recrystallization. Chemical evolution of
fluids along their migration path, fluid-to-rock ratio, fluid acidity, redox, and temperature also influence REE profile shape, which helps establish genetic and timing constraints on studied deposits and improves knowledge of the metallogeny of the
Kootenay Arc and Rocky Mountains. |
| 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 | 328001 |
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