The Candelaria copper-gold deposit, Region III, Chile: Paragenesis, geochronology and fluid composition

被引：0

作者：

Ullrich, TD ^{[1
]}

Clark, AH ^{[1
]}

机构：

[1] Queens Univ, Dept Geol Sci & Geol Engn, Kingston, ON, Canada

来源：

MINERAL DEPOSITS: PROCESSES TO PROCESSING, VOLS 1 AND 2 | 1999年

关键词：

D O I：

暂无

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

An early, barren, period of potassium and iron-metasomatism (114.2 +/- 0.8 Ma) of previously-spilitized earliest-Cretaceous andesitic strata preceded calcium metasomatism and accompanying copper-gold mineralization (111.7 +/- 0.8 Ma) at Candelaria. Mineralization was sensibly contemporaneous with uplift and development of a mid-Cretaceous unconformity. Cu and Au were deposited from hypersaline, CO2-rich and thermally retrograde fluids, which have S-isotopic compositions indicative of an evolution from a magmatic to an evaporitic sulphur source.

引用

页码：201 / 204

页数：4