Source of salinity in the Broken Hill (Australia) Pb-Zn-Ag deposit: insights from halogen ratios in fluid inclusions

被引：0
|
作者：
Slack, John F. [1 ]
Banks, David A. [2 ]
Wilkins, Ronald W. T. [3 ]
机构：
[1] US Geol Survey, 959 Natl Ctr, Reston, VA 22092 USA
[2] Univ Leeds, Leeds, W Yorkshire, England
[3] CSIRO Energy Flagship, Canberra, ACT, Australia
来源：
MINERAL RESOURCES TO DISCOVER, VOLS 1-4 | 2017年
关键词：
NEW-SOUTH-WALES; WILLYAMA SUPERGROUP; METAMORPHIC FLUIDS; RICH ROCKS; ORIGIN; OREBODY; MINERALIZATION; GEOCHRONOLOGY; MOUNTAINS; HISTORY;
D O I：
暂无
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Ratios of Na/Br, Br/CI, and I/CI were determined on leachates of fluid inclusions from the Broken Hill Pb-ZnAg deposit in Australia. Paragenetic relations suggest that whereas all analyzed inclusions formed during or after regional metamorphism, ion ratios are not greatly changed from those of the pre-metamorphic ore-forming fluids. Based on relatively high Br/CI and I/CI ratios, and low Na/Br ratios, we suggest that the high salinities that characterize Broken Hill fluid inclusions reflect a source dominated by evaporated seawater and not dissolved evaporites.
引用
收藏
页码：637 / 640
页数：4
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