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Mineral Hill, Jardine

Montana, USA

Main commodities: Au
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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 summary 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.


  References & Additional Information
   Selected References:
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


Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge.   It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published.   While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations.

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