| 关于成矿作用地球化学研究的几个问题 |
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| 引用本文： | 张德会.关于成矿作用地球化学研究的几个问题[J].地质通报,2005(Z1). |
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| 作者姓名： | 张德会 |
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| 作者单位： | 中国地质大学地球科学与资源学院 北京100083 |
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| 基金项目： | 国家自然科学基金项目(编号:40173021)，国家重点基础研究项目(973项目)(2002CB4126)资助 |
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| 摘 要： | 成矿作用地球化学是矿床地球化学的基础理论分支,属于应用基础类学科,以地球化学原理和方法研究造成元素沉淀富集形成矿床的地球化学作用的原因和机理。本文讨论了热液矿床成矿作用的几个问题。指出花岗岩与矿床类型之间是否存在相关性,即花岗岩是否具有成矿专属性仍然存在争论,需要继续探索。花岗岩类具有成矿潜力不等于这些花岗岩最终都能成矿。决定岩浆发生成矿作用的因素很多,其中岩浆分异作用过程和流体释放时间及其机制可能是决定成矿发生和矿床类型的关键,岩浆熔体中挥发组分及其行为可能是岩浆能否发生成矿作用的决定性要素,聚焦流体流动是成矿作用能否发生的关键环节,而自组织临界性和反馈作用决定了成矿效率和矿床的规模。
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| 关 键 词： | 成矿作用地球化学 应用地球化学 问题讨论 |
Some problems on the geochemistry of ore-forming processes. |
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| ZHANG DehuiSchool of Earth Sciences and Mineral Resources,China University of Geosciences,Beijing ,China.Some problems on the geochemistry of ore-forming processes.[J].Geologcal Bulletin OF China,2005(Z1). |
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| Authors: | ZHANG DehuiSchool of Earth Sciences and Mineral Resources China University of Geosciences Beijing China |
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| Institution: | ZHANG DehuiSchool of Earth Sciences and Mineral Resources,China University of Geosciences,Beijing 100083,China |
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| Abstract: | The geochemistry of ore-forming processes is one of the branches of applied geochemistry,which uses the principle and method of geochemistry to study and explain the mechanisms of geochemical processes responsible for the precipitation of ore elements and formation of ore deposits.In this paper,some problems concerning the geochemistry of ore-forming processes of hydrothermal ore deposits are discussed.Whether or not there is a relationship between granites and ore deposit types,i.e.whether granites have metallogenic specialization,is still in dispute and needs further study.The fact that granitoids have ore potential does not imply that the granitic magmas can produce ore deposits in the end.There are many controlling factors responsible for ore-forming processes.Among these,magmatic differentiation and the time and mechanism of fluid release may be the key controls on the ore-forming processes and deposit types.The magmatic volatile phases(MVP) in hydrothermal fluids and their behaviors are probably one of the decisive factors for determining whether ore-forming processes can occur.Focusing of fluid flow appears to be a critical link in the occurrence of the ore-formation processes,while the self-organized criticality and the extent to which feedback occurs between processes determine the efficiency of metal deposition and characteristics of the resulting deposit,as well as the size of the deposit. |
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| Keywords: | geochemistry of ore-forming processes applied geochemistry problem and discussion |
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