

Author: de Jong G. Rotherham J. Phillips G.N. Williams P.J.
Publisher: Springer Publishing Company
ISSN: 0016-7746
Source: Geologie en Mijnbouw, Vol.76, Iss.4, 1997-04, pp. : 311-319
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Abstract
In Mid Proterozoic crystalline rocks of the Mount Isa Inlier, around Cloncurry, Australia, 2000 km^2 of alteration and brecciation are the product of high-temperature (> 450 °C) concentrated saline solution activity. During retrogression, this fluid was locally responsible for mobility of V, Y, Nb and light rare-earth elements (15 × enrichment). Copper and S were leached during alteration and this may have been a significant source of components in nearby Cu-Au deposits. Similar rare-earth-element behaviour has been observed in the hematite breccias which host Cu-sulfides at the giant Olympic Dam Cu-Au deposit.
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