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TitleMetamorphosed hydrothermal ore deposits
AuthorCorriveau, LORCID logo; Spry, P G
SourceGeochemistry of mineral deposits; by Scott, S (ed.); Treatise on geochemistry vol. 13, 2014 p. 175-194,
Alt SeriesEarth Sciences Sector, Contribution Series 20110404
Mediapaper; on-line; digital
File formatpdf
Subjectsgeochemistry; igneous and metamorphic petrology; economic geology; hydrothermal deposits; hydrothermal systems; hydrothermal alteration; metamorphic environment; metamorphic zones; alteration
Illustrationslocation maps; photomicrographs; tables; plots; ternary diagrams
ProgramGEM: Geo-mapping for Energy and Minerals Iron-oxide Copper-gold (IOCG) / Multiple Metals - Great Bear Lake (NWT)
AbstractThis chapter on metamorphosed hydrothermal ore deposits summarizes key attributes of mineral deposits that are hydrothermal in nature, originally formed at shallow crustal depths, entrained in orogenesis, metamorphosed to the upper amphibolite or granulite facies, and preserved. Due to the significant mineralogical, textural, and structural changes associated with metamorphism, such ore systems are commonly camouflaged within their highly deformed and metamorphosed host setting. Nevertheless, the well-documented geochemical and mineralogical signatures and geospatial patterns of alteration zones associated with hydrothermal ore deposits remain diagnostic once metamorphosed. Knowledge of their systematic mineralogical and paragenetic characteristics enhances their identification and may optimize lithogeochemical exploration programs in high-grade metamorphic terranes. With time, this will facilitate discoveries of ores, improve metamorphosed ore deposit models, and further stimulate the development of exploration guidelines for their underexplored host terranes.

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