白云鄂博地区碳酸岩墙及岩墙旁侧石英岩中的包裹体研究  

Fluid inclusion studies on carbonatite dyke and associated quartzite in Bayan Obo, Inner Mongolia, China.

作　　者：倪培[1] A H RANKIN 周进[1] 

机构地区：[1]南京大学成矿作用国家重点实验室,南京210093 [2]School of Earth Science and Geography,Kingston University,Kingston upon Thames,Surrey KT1 2EE,UK

出　　处：《岩石学报》2003年第2期297-306,共10页Acta Petrologica Sinica

基　　金：国家自然科学基金项目(编号:49733002);英国Kingston University research associate fellowship联合资助

摘　　要：白云鄂博的碳酸岩墙中包裹体类型有多子晶包裹体、两相水溶液包裹体、含CO_2三相包裹体和含子晶三相包裹体,岩相学和显微测温结果表明,这些包裹体与国外典型的碳酸岩中的包裹体具有很大程度的一致性,反映了其岩浆成因特点;碳酸岩墙中旁侧的白云鄂博H2石英岩中含有大量的流体包裹体,主要类型为NaCl-H_2O包裹体、CO_2包裹体和H_2O±CO_2±固体的包裹体。包裹体的岩相学、显微测温、阴极发光特征、包裹体成分ICP-MS测定,激光拉曼研究等,揭示出石英岩中的包裹体捕获了来自碳酸岩墙的碳酸岩浆流体,提供了一种不可多得的直接研究碳酸岩流体的手段。Fluid inclusion types of carbonatite dyke in Bayan Obo mine area consist of multi-solid inclusion, aqueous inclusion, CO2-bearing inclusion and daughter mineral -bearing inclusions. Petrography and microthermometry study indicate that these fluid inclusions have great similarity with the typical fluid inclusion in carbonatite of the world, which suggest the magmatic origin. Quartzite associated with carbonatite dyke contain abundant fluid inclusions, which can be briefly divided into three types: aqueous inclusion, CO2 inclusion and mixed H2O+/-CO2+/- solid inclusions. Petrography, microthermometry, CL characteristics, ICP-MS determination of inclusion fluid, laser Ramam analysis of the inclusion volatile suggest the fluid trapped in the quartzite are the magmatic fluid from the carbnatite dyke. These fluid inclusions provided a best means to study the cabonatite fluid which preserved in the geological process.

关 键 词：流体包裹体 碳酸岩墙 石英岩 白云鄂博 

分 类 号：P588.15[天文地球—岩石学]