流体的沸腾和混合在热液成矿中的意义

doi:10.11867/j.issn.1001-8166.1997.06.0546

地球科学进展 ›› 1997, Vol. 12 ›› Issue (6): 546 -552. doi: 10.11867/j.issn.1001-8166.1997.06.0546

流体的沸腾和混合在热液成矿中的意义

张德会

中国科学院地球化学研究所贵阳 550002

收稿日期:1997-01-18 修回日期:1997-03-31 出版日期:1997-12-01
通讯作者: 张德会,男,1955年8月出生,副教授,研究方向为矿床地球化学及成矿作用动力学。
基金资助:
国家自然科学基金重点项目“典型成矿区带成矿作用动力学及其时空结构”(项目编号:49633120)、国家自然科学基金“银山多金属矿床成矿流体地球化学研究及深部矿化推断”(项目编号:49773196)和中国博士后科学基金A类及中国科学院矿床地球化学开放研究实验室基金联合资助。

SOME NEW ADVANCES IN ORE-FORMING FLUID GEOCHEMISTRY ON BOILING AND MIXING OF FLUIDS DURING THE PROCESSES OF HYDROTHERMAL DEPOSITS

ZHANG Dehui

Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002

Received:1997-01-18 Revised:1997-03-31 Online:1997-12-01 Published:1997-12-01

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讨论了流体沸腾和混合在热液成矿中的重要作用及研究进展。成矿流体的降温可能不是许多金属矿物沉淀的最有效机制；流体的沸腾作用对浅成热液矿床、斑岩铜钼等矿床中矿物的沉淀作用很大，造成的矿化具有强度大、品位富及垂向分带较发育的特征，同时因其影响范围小、作用时间短，限制了它的作用的发挥。流体的混合作用在几乎所有热液矿床的形成中都扮演着重要角色，其影响范围大、持续时间长可能是许多大型－超大型矿床形成的重要原因。

关键词: 成矿流体地球化学, 沸腾作用, 混合作用

The ore forming fluid geochemistry is an important branch of fluid geology. In recent years, among which the studies on precipitation mechanisms of metal elements has been paid attention to. Emphasis are placed on boiling and mixing of fluid controls on hydrothermal ore deposits.In this paper, some new advances in the boiling and mixing of fluids have been reviewed. The cooling resulted from temperature drop is not most effiective in precipitation some metal elements. Boiling of hydrothermal solution is perhaps the most effective ore depositional mechanism in many boiling hydrothermal systems, epithermal systems, and porphyry copper molybdenum deposits.With the result that mineralization is characterized by high grade, large intensity, and well developed vertical ore zoning. Its small influence range and short lived time restrict its role played in ore deposition. Mixing of hydrothermal solutions may be responsible for many hydrothermal deposits formation. Its larger influence range and long lived time is perhaps one of very important mechanisms for many large and superlarge deposits.

Key words: Ore-forming fluid geochemistry, Boiling of fluid, Mixing of fluids

中图分类号:

P611

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