Abstract

Intense weathering of copper orebodies in New South Wales and Queensland, Australia has produced an unusual suite of secondary copper minerals comprising chrysocolla, azurite, malachite and the phosphates libethenite and pseudomalachite. The phosphates persist in outcrop and show a marked zoning with libethenite confined to near-surface areas. Abundant chrysocolla is also found in these environments, but never replaces the two secondary phosphates or azurite. This leads to unusual assemblages of secondary copper minerals, that can, however, be explained by equilibrium models. Data from the literature are used to develop a comprehensive geochemical model that describes for the first time the origin and geochemical setting of this style of economically important mineralization.

 
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Bibliographic Data

Short Form
Crane et al., 2001, Rec. Aust. Mus. 53(1): 49–56
Author
Martin J. Crane; J. L. Sharpe; P. A. Williams
Year
2001
Title
Formation of chrysocolla and secondary copper phosphates in the highly weathered supergene zones of some Australian deposits
Serial Title
Records of the Australian Museum
Volume
53
Issue
1
Start Page
49
End Page
56
DOI
10.3853/j.0067-1975.53.2001.1323
Language
English
Date Published
09 May 2001
Cover Date
09 May 2001
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Digitized
09 May 2001
Available Online
09 May 2001
Reference Number
1323
EndNote
/Uploads/Journals/17903/1323.enw
Title Page
/Uploads/Journals/17903/1323.pdf
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Complete Work
/Uploads/Journals/17903/1323_complete.pdf
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