| 李瑞鹏,颜建东.铂族元素矿床热液流体成矿模型探讨[J].地质找矿论丛,2013,28(3):335-343 |
| 铂族元素矿床热液流体成矿模型探讨 |
| Hydrothermal fluids and ore genesis of PGE |
| 投稿时间：2012-11-27 修订日期：2013-08-09 |
| DOI：10.6053/j.issn.1001-1412.2013.03.002 |
| 中文关键词: 铂族元素矿床 热液流体 矿床成因 |
| 英文关键词:PGE deposits hydrothermal fluid ore-forming |
| 基金项目:国家自然科学基金项目(编号:40472051)和中国地质调查局项目(编号:1212010711814)资助。 |
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| 中文摘要: |
| 世界上所有的铂族金属矿床都有热液流体活动的迹象。影响铂族元素(PGE)成矿的流体主要有两类:堆晶体后期流体(>500 ℃)和岩浆后期流体(<500 ℃)。低温热液(<500 ℃)中, PGE可能主要以氯络合物及氢硫基络合物的形式运移;高温热液(>500 ℃)中,PGE可能主要以氯络合物的形式运移。在详细论述不同温度、压力条件下的热液流体中PGE溶解性质的基础上,分析了PGE在流体中的溶解、迁移、富集及可能的沉淀机制,为探寻PGE矿床的成因提供一个突破口。 |
| 英文摘要: |
| Almost all of the PGE deposits in the world are associated with hydrothermal fluid activity. In low-temperature fluids (< 500 ℃), PGEs are mainly transported as chloro-complex and sulfhydryl-complex, whereas in high-temperature (> 500 ℃) fluids, PGEs exist in the form of chloro-complex. However, how PGEs concentrate and deposit in fluids are still unclear. In this paper, we have a detailed discussion of PGE solubility under different temperatures and pressures, and the mechanisms of how PGEs dissolve, transport, concentrate and deposit in fluids. This will provide important information for the origin of PGE deposits. Two kinds of fluids are proposed to have an influence on PGE deposits. One is post-cumulus fluids (> 500 ℃) and the other is post-magmatic fluids (> 500 ℃). Post-magmatic fluids usually have complex origins and multi-stage activities, which may hamper the understanding of PGE processes in fluids. We try to investigate PGE behavior in different fluid systems and reveal the significance of hydrothermal fluids in the ore-forming processes of PGE deposits. |
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