期刊论文

Characteristics of the ore-forming fluids and its constraints on the genesis of Abra Pb-Cu deposit, western Australia

Wang, Mingyan

中文

大地构造与成矿学

Geotectonica et Metallogenia

1001-1552

2014

38

3

598-608

10.16539/j.ddgzyckx.2014.03.009

国土资源部“2010年度境外矿产资源风险勘探财政补贴”项目 国家科技攻关计划课题（编号：2003BA612A-05） 国家自然科学基金项目（批准号：41002027）资助.致谢：非常感谢中国科学院广州地球化学研究所陈华勇研究员及编辑部老师在审稿、修改过程中的指导和帮助.

本校为其他机构

爱博(Abra)Pb-Cu矿床位于西澳洲Bangemall盆地中, 产于中元古界Edmund群浅海相碎屑岩地层中, 矿体上部呈层状、似层状, 下部呈网脉状。由于该矿床地质特征复杂, 研究程度不高, 矿床成因和成矿流体来源尚存在争议。本文拟探讨成矿流体的性质、来源及演化。流体包裹体显微测温研究表明矿石中石英所捕获的流体包裹体为两相H_2O溶液包裹体、含CO_2和CH_4的流体包裹体、含子矿物三相包裹体等3种类型。上部赤铁碧玉岩段和磁铁石英岩段矿石中流体包裹体均一温度为162.0~194.7 ℃, 盐度为5.8%~13.0%; 下部绿泥石化石英砂岩段均一温度为172.7~250.7 ℃, 盐度为7.0%~17.0%。各岩性段中温度和盐度变化都较大...

The Abra Pb-Cu deposit was discovered in 1981 in the Bangemall Basin, north-western of Western Australia. The ore body is hosted in the Meso-proterozoic Edmund Group shallow marine clastic sequences. The layered ores present in the upper section, and the veined ores occur in the lower section. Because of its complicated geology and lack of detailed investigations, the genesis of the Abra deposit is debatable. In this paper, the characteristics, origin and evolution of the ore-forming fluid are investigated. Based on the results of micro-thermometry, the fluid-inclusions in the quartz can be di...