Mt Chalmers

Queensland, Qld, Australia

Main commodities: Cu Au Zn Ag
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Mount Chalmers is a small high grade volcanic hosted massive sulphide deposit near Rockhampton in East Queensland, Australia.   It is some 60 km to the east of the great Mt Morgan Cu-Au deposit which is hosted by similar volcanics.

Mt Chalmers is hosted by rhyodacitic pyroclastics of the Permian Berserker Beds.

Mineralisation is present as two parallel elongate lodes, each composed of an upper massive and partly bedded Cu-Au-Zn-Ag-barite lens and a lower Cu-Au bearing stringer sulphide zone.   The upper band of each lens appears to grade down slope over a limited lateral interval into a bedded carbonate-pyrite band.

The two lodes are shallowly dipping, the Main Lode being draped over the crest of a 300 m diameter siliceous pyroclastic dome, while the West Lode is on the western flank of the same dome.   The dome has a relative relief of 120 m.

Proven + probable reserves totalled 3.86 Mt @ 1.65% Cu, 1.87 g/t Au.   Mining commenced in March 1979, with the ore being treated at Mount Morgan.

The most recent source geological information used to prepare this summary was dated: 1980.    
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:
Large R R  1992 - Australian volcanic-hosted massive sulfide deposits: features, styles, and genetic models: in    Econ. Geol.   v87 pp 471-510
Large R R, Both R A  1980 - The vocanogenic sulfide ores at Mount Chalmers, eastern Queensland: in    Econ. Geol.   v75 pp 992-1009
Sainty R A  1992 - Shallow-water stratigraphy at the Mount Chalmers volcanic-hosted massive sulfide deposit, Queensland, Australia: in    Econ. Geol.   v87 pp 812-824
Taube A  1990 - Mount Chalmers Gold-Copper deposits: in Hughes F E (Ed.), 1990 Geology of the Mineral Deposits of Australia & Papua New Guinea The AusIMM, Melbourne   Mono 14, v2 pp 1493-1497

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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