深源CO_2及其对金的富集成矿作用  

The roles of deeply-derived CO_2 in gold mineralization

作　　者：岳可芬[1] 赫英[1] 张维平[1] 

机构地区：[1]西北大学地质学系,西北大学化学系陕西西安710069

出　　处：《西北大学学报（自然科学版）》2004年第1期90-92,共3页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40372052和49972034);国家"973"资助项目(G199904321)

摘　　要：目的　深源CO2与金成矿作用关系的研究是当前地学界倍受关注的前沿课题,介绍了深源CO2的特点。方法　以国内外一些典型金矿研究资料为基础,结合我们近年从事矿床地球化学研究的成果,为深源CO2与金矿化间的联系提供了直接的地质证据。结果　地球深部CO2储量巨大,且处于超临界状态,对金矿化有重要作用。结论　深源CO2对金矿化的作用主要表现为运输成矿物质和提供巨大的能量两个方面。AimThe study on the relations between deeply-derived CO_2 and gold ore-forming processes has become one of the most interesting researches for geoscientists in the world. The characteristics of deeply-derived CO_2 are introduced. Methods Based on the data taken from the typical gold deposits in the world and literatures about deeply-derived CO_2, combining our experience about deposit geochemistry in recent years, the genetic relationship between gold mineralization and deeply-derived CO_2 is indicated. ResultsThere is a lot of CO_2 in depth of earth, which is in supercritical state. This deeply-derived CO_2 can play an important role in gold mineralization. ConclusionThe deeply-derived CO_2 can provide large heat to the shallow position, as well as has large potential to dissolve and transport ore-elements in deep position.

关 键 词：地幔流体 深源CO2 金成矿流体 金矿化 

分 类 号：P618.51[天文地球—矿床学]