| 云南哀牢山和新疆可可托海伟晶岩矿物中熔融包裹体电子探针研究 |
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| 引用本文： | 李兆麟,张文兰.云南哀牢山和新疆可可托海伟晶岩矿物中熔融包裹体电子探针研究[J].高校地质学报,2000,6(4):509-522. |
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| 作者姓名： | 李兆麟 张文兰 |
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| 作者单位： | 1. 中山大学地球科学系，广州，510275；2. 南京大学金属成矿作用国家重点 实验室， 江苏 南京， 210093 |
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| 基金项目： | 国家自然科学基金!(No .496 73189、No .498730 18)，高等学校博士学科点专项科研基金!(No .980 5 5 80 7)，南京大学金属成矿作用国家 |
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| 摘 要： | 运用电子探针测定了云南哀牢山伟晶岩和新疆可可 托海伟晶岩矿物中熔融包裹体及流体-熔融包裹体子矿物成分。据73个包裹体中120个测 点分 析结果，鉴定出锌尖晶石、刚玉、磷灰石、磁铁矿、白云母、黑云母、钾长石、钠长石、绿 柱石和石英等10种 子矿物，并确定矿物组合27个。其中锌尖晶石、刚玉在两地区伟晶岩熔融包裹体中属首次发 现，磷灰石成分属首次测定。两地伟晶岩矿物的熔融及流体-熔融包裹体中子 矿 物成分及矿物组合各异，包裹体中子矿物与主矿物的化学成分存在一定演化规律，可作为了 解伟晶岩浆结晶分异作用、元素演化规律的依据。研究表明，伟晶岩存在局部岩浆分异作 用，岩浆具不混溶性及非均匀性。此成果对了解伟晶岩物质成分、形成机制及成因研究具重 要意义。对岩浆岩、地幔岩及陨石研究也有一定启迪。
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| 关 键 词： | 电子探针分析 流体－熔融包裹体 子矿物成分分析 |
| 收稿时间： | 2000-12-20 |
| 修稿时间： | 2000-05-08 |
Electronic Microprobe Study on the Melt Inclusions in Pegmatite Minerals from Ailaoshan and Keketuohai Pegmatite Deposits |
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| LI Zhaolin ,ZHANG Wen lan ,LI Wen ,ZHAI Wei ,SHI Gui yong.Electronic Microprobe Study on the Melt Inclusions in Pegmatite Minerals from Ailaoshan and Keketuohai Pegmatite Deposits[J].Geological Journal of China Universities,2000,6(4):509-522. |
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| Authors: | LI Zhaolin ZHANG Wen lan LI Wen ZHAI Wei SHI Gui yong |
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| Institution: | 1. Department of Earth Sciences, Zhongshan University, Guangzhou 510275; 2. State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing 210093 |
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| Abstract: | The compositions of daughter minerals in melt and fluid melt inclusions in minerals from Ailaoshan pegmatite, Yunnan Province and Keketuohai pegmatite, Xinjiang Autonomous Region were analyzed by electronic microprobe. 120 analytical points from 73 inclusions were analyzed. 10 daughter minerals (including zinc spinel, corundum, apatite, magnetite, muscovite, biotite, microcline, albite, quartz and alumo silicate glass) and 27 mineral assemblages were identified. Zinc spinel and corundum were identified for the first time in these regions. The analytical results indicate that the daughter mineral compositions and mineral assemblages in melt and fluid melt inclusions vary with different types of pegmatites. The evolution patterns in compositions of daughter minerals and host minerals could be used as a basis to search for the evolution patterns of chemical elements during pegmatite crystallization. The existence of local magmatic differentiation, immiscibility and heterogeneity was proved for the pegmatite magmas. The results of this study are significant in understanding the compositions, forming mechanisms and origins of pegmatites. It would also inspire further studies on magmatites, pyrolites and meteorites. |
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| Keywords: | electronic microprobe analysis pegmatites melt and fluid-melt inclusions compositions of daughter minerals local magmatic differentiat8 |
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