Mineral Hill, Jardine |
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Montana, USA |
Main commodities:
Au
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Super Porphyry Cu and Au
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IOCG Deposits - 70 papers
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All papers now Open Access.
Available as Full Text for direct download or on request. |
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The Mineral Hill Mine at Jardine is an Archaean lode gold deposit in the Beartooth Mountains of south-western Montana, USA.
Mineralisation is hosted by 3.0 to 3.2 Ga lower amphibolite facies grunerite bearing banded iron formation and meta-turbidites on the Wyoming Craton.
Three types of ore have been mined, namely: 1). the dominant style where Au is contained in marginal wall rock altered envelopes of arsenopyrite, pyrrhotite, hornblende and grunerite sandwiching 0.01 to 1 m thick quartz veins within iron formation, 2). in generally less than 5 m thick banded quartz veins with little or no accompanying wall rock alteration, and 3). in deformed quartz boudins.
The total pre-mine resource has been estimated at 0.9 Mt of ore @ 9.33 g/t Au.
For detail see the reference(s) listed below.
The most recent source geological information used to prepare this decription was dated: 1995.
This description is a summary from published sources, the chief of which are listed below. © Copyright Porter GeoConsultancy Pty Ltd. Unauthorised copying, reproduction, storage or dissemination prohibited.
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Smith D S 1996 - Hydrothermal alteration at the Mineral Hill Mine, Jardine, Montana: a lower Amphibolite facies Archean lode Gold deposit of probable synmetamorphic origin: in Econ. Geol. v91 pp 723-750
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