热液石英中微量元素特征及应用:认识与进展
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本文为全国危机矿山接替资源找矿项目(编号 20089949和200841019)的成果。


Distribution and Application of Trace Elements in Hydrothermal Quartz:Understanding and prospecting
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    摘要:

    文章以热液石英为研究对象,基于石英的晶体结构特征和化学性质,以及近年来国内外在此领域取得的认识和成果,论述了石英中微量元素的赋存状态和应用。研究表明,微量元素主要以3种方式进入到石英晶体中:单原子替代、原子团替代和补偿电价替代。石英在SEMCL图像中的亮度和石英中微量元素的分布具有一定的相关性,根据石英的微量元素组成和阴极发光特点,可以有效地区别岩浆期与热液期以及热液期不同阶段的石英,有利于成矿阶段的划分;石英中Ti、Al等的分布与温度的密切相关,构成地质温度计(如TITANiQ),能够定量地计算脉体的形成温度;石英中Ti、Al等元素的含量还常常与溶液酸碱度有关,利用热液石英中Ti和Al的含量变化,可以探讨石英沉淀的pH条件等,进而认识热液流体的演化特点。

    Abstract:

    Based on chemical properties and crystal structure characteristics of quartz, together with the acquired cogination and achievement of this field all over the world, the writers want to give a review on the distribution and application of traceelements in hydrothermal quartz. There are three main substitution modes govern the incorporation of structural trace elements: single substitution, double substitution, compensated. As the intensity of SEMCL image is related to traceelements content in quartz, traceelements in quartz can be applied to constrain geologic process. According to the distribution of traceelements in quartz formed at different temperature in hydrothermal deposits, the metallogenetic temperature can be appromately judged, and be mensurable by TITANiQ. The composition and distribution of traceelements in quartz can tell quartz in magmatic stage from hydrothermal stage, and the phase of hydrothermal quartz can be effectively distinguished as well. Aluminum and titanium concentration in quartz is strongly dependent on pH of hydrothermal fluids, which can be used to detect pH of quartz precipitation and speculate the evolution of hydrothermal fluids.

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陈小丹,陈振宇,程彦博,叶会寿,汪欢.2011.热液石英中微量元素特征及应用:认识与进展[J].地质论评,57(5):707-717,[DOI].
.2011. Distribution and Application of Trace Elements in Hydrothermal Quartz:Understanding and prospecting[J]. Geological Review,57(5):707-717.

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