| 张绮玲,章雨旭,江少卿.白云鄂博矿床的流体包裹体研究[J].矿产勘查,2010,1(1):50-59 |
| 白云鄂博矿床的流体包裹体研究 |
| Study on fluid inclusions from Bayan Obo deposit |
| 投稿时间：2009-11-19 |
| DOI： |
| 中文关键词: 包裹体 铁矿 REE矿 Nb矿 热水沉积 白云鄂博 内蒙古 |
| 英文关键词: fluid inclusion iron deposit REE deposit Niobium deposit hydrothermal sedimentary rocks Bayan Obo, Inner Mongolia |
| 基金项目: |
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| 摘要点击次数: 2973 |
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| 中文摘要: |
| 世界著名的白云鄂博矿床的成因研究历史很长,对其成因有多种不同的认识。流体包裹体是被保存的成矿流体的直接证据,而包裹体方面的证据尚不多,特别是赋矿白云岩或矿石中矿物的包裹体数据很少。笔者等对赋矿白云岩或矿石中24片包裹体薄片中的磷灰石、白云石、方解石、菱镁矿、萤石、钠长石和一件玉髓中的细粒石英进行了显微测温,得到500多个温度数据,用激光拉曼光谱仪测定了19个单个包裹体的气液相成分。结果表明,它们的均一温度在126℃～295℃,明显低于已有的下伏碳酸盐脉(墙)中矿物的均一温度；盐度为w(NaCleq) 4.24%～20.82%,与下伏碳酸盐脉(墙)中矿物内的流体包裹体大致相当。文章资料支持赋矿白云岩及矿石是热水沉积的认识。 |
| 英文摘要: |
| The study on mineralization of the world famous Bayan Obo deposit has a long history with different points of view about its genesis.However, few evidences from fluid inclusions has been summarized yet, especially data of fluid inclusions yielded from the dolomite and other minerals hosted in ore. 24 thin sections of fluid inclusion are sampled from the dolomite and other minerals hosted in ore, and then apatite, dolomite, calcite, magnesite, fluoriter, albite and a fine grain quartz from chalcedony were conducted microthermometry which yielded more than 500 temperature data, meanwhile gas and liquid components of 19 fluid inclusions are measured using the Laser Raman Spectroscopy. The results show that the homogeneous temperature in range of 126 ℃~295 ℃ is significantly lower than available data from the mineral hosted in the underlying carbonate veins(dykes)； the salinity w(NaCleq) 4.24%~20.82%, roughly equals with values from the mineral hosted in the underlying carbonate veins(dykes). The above results support the recognition of that the dolomite and the minerals hosed in ore are generated from the hydrothermal sedimentary rocks. |
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