长江中下游成矿带矽卡岩型矿床矿物包裹体激光拉曼分析结果及其地质-地球化学意义

发布时间：2018-06-02 14:35

本文选题：激光拉曼分析 + 熔融包裹体和流体-熔融包裹体　；参考：《岩石学报》2017年06期

【摘要】：矽卡岩矿床各种硅酸盐矿物中熔融包裹体和流体-熔融包裹体的显微测温资料和相成分让我们提出过大量矽卡岩是岩浆成因的建议。在本文中,我们提供沿长江中下游成矿带的许多矽卡岩矿床包含在石榴子石和辉石里的熔融包裹体和流体-熔融包裹体的激光拉曼分析结果,目的是证明所研究的并与Cu-Fe-Au矿床共生的矽卡岩系岩浆成因。我们的研究结果显示,熔融包裹体只含固体相和微量气相。流体-熔融包裹体除了含大量固相外,还含微量流体和气相以及没有被仪器检测到的气体。固体相与包裹体寄主矿物相同或类似。流体相主要为水或盐水溶液和包括C6H6、C3H6、C3H8、CH4、CO2和O2的气体。我们提出,熔融包裹体和流体-熔融包裹体是原始岩浆的最好代表。这就证明,矽卡岩组合是由一个原生岩浆直接结晶而成。此外,我们还讨论了岩浆矽卡岩形成的温度、分布范围和规模、形成机制和与Cu-Fe-Au矿化作用的联系。
[Abstract]:The microthermometric data and facies composition of molten inclusions and fluid-melt inclusions in various silicate minerals of skarn deposits suggest that a large number of skarn rocks are magmatic origin. In this paper, we provide the results of laser Raman analysis of molten inclusions and fluid-melt inclusions contained in pomegranate and pyroxene in many skarn deposits along the metallogenic belt of the middle and lower reaches of the Yangtze River. The aim is to prove the magma genesis of the skarn series studied and symbiotic with the Cu-Fe-Au deposit. Our results show that the melt inclusions contain only solid phase and micro gas phase. Fluid-melt inclusions contain not only a large amount of solid, but also trace fluids and gas phases and gases that have not been detected by the instrument. The solid phase is the same or similar to the host mineral of the inclusions. The fluid phase is mainly composed of water or brine solution and gases including C _ 6H _ 6C _ 3H _ 6N C _ 3H _ 8C _ 3H _ 8C _ 3H _ 8 Ch _ 4 CO _ 2 and O _ 2. We suggest that melt inclusions and fluid-melt inclusions are the best representatives of primitive magma. This proves that the skarn assemblage is directly crystallized from a primary magma. In addition, we also discuss the temperature, distribution range and scale of magmatic skarn formation, the formation mechanism and the relationship with Cu-Fe-Au mineralization.
【作者单位】：中国科学院广州地球化学研究所中国科学院矿物学与成矿学实验室;中国地质大学地质过程与矿产资源国家重点实验室;
【基金】：国家自然科学基金项目(49372106、49772115) 中国地质大学地质过程与矿产资源国家重点实验室开放基金(GPMR201103)联合资助
【分类号】：P611

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