Hydrothermal alteration associated with gold mineralization in the southern Apuseni mountains, Romania: preliminary Sr isotopic data

被引：13

作者：

Alderton, DHM ^{[1
]}

Thirlwall, MF ^{[1
]}

Baker, JA ^{[1
]}

机构：

[1] Univ London, Royal Holloway & Bedford New Coll, Dept Geol, Egham TW20 0EX, Surrey, England

来源：

MINERALIUM DEPOSITA | 1998年 / 33卷 / 05期

关键词：

Gold; Calcite; Pyrite; Leaching; Romania;

D O I：

10.1007/s001260050167

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Precious-metal mineralization in the southern Apuseni Mountains of western Romania is hosted by mid-Miocene (similar to 14 Ma) andesitic stocks and lava flows. The mineralized veins are surrounded by aureoles of hydrothermal alteration, consisting of quartz, sericite, K-feldspar, pyrite and calcite. The alteration process caused a total homogenization of initial Sr-87/Sr-86 in the rocks. Ages determined for the hydrothermal alteration are 13.7-15.7 Ma, indicating that hydrothermal alteration immediately followed igneous activity. Furthermore, a large influx of radiogenic Sr took place during alteration, this Sr probably being derived from the hydrothermal leaching of continental meta-sedimentary rocks in the basement.

引用

页码：520 / 523

页数：4

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