| 滇西澜沧变质带中白云母的研究及其地质意义 |
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| 引用本文： | 赵靖.滇西澜沧变质带中白云母的研究及其地质意义[J].岩石矿物学杂志,1993(3). |
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| 作者姓名： | 赵靖 |
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| 作者单位： | 北京大学地质系 北京 |
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| 摘 要： | 本文以滇西澜沧变质带中最为广泛分布的造岩矿物——白云母为对象,详细研究和分析了其成分、多型类型及b_0值等,探讨了白云母的发育规律。研究结果表明,本带中绝大多数白云母为多硅白云母,且为3T+2M_1型,与蓝闪石共生的则以3T多硅白云母为主。此外,澜沧变质带经历了蓝闪石片岩亚相的高压变质作用,与古特提斯构造演化密切相关,并可与世界著名的高压带对比。
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| 关 键 词： | 滇西澜沧变质带 白云母b_0值 高压变质作用 蓝片岩相 吉特提斯构造 |
A Study of Muscovites from the Lancang Metamorphic Belt in Western Yunnan and Its Geological Significance |
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| Zhao Jing.A Study of Muscovites from the Lancang Metamorphic Belt in Western Yunnan and Its Geological Significance[J].Acta Petrologica Et Mineralogica,1993(3). |
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| Authors: | Zhao Jing |
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| Affiliation: | Zhao Jing Department of Geology,Peking University,Beijing,100871 |
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| Abstract: | This paper is devoted to the study of muscovites, the most extensivelydistributed rock--forming minerals in the Lancang metamorphic belt of westernYunnan. Their composition, polytypes and b_0 values are analysed and examinedin detail, and the regularity of their growth is tentatively discussed. It isshown that the overwhelming majority of muscovites are phengites of 3T + 2M_1type whereas those associated with glaucophane are mainly 3T phengites.Studies also indicate that the Lancang metamorphic belt underwent high--pressuremetamorphism of blue schist subfacies and was closely related to the evolutionof paleotethys. Therefore, it can be correlated with other well--known high--pressure belts in the world. |
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| Keywords: | Lancang metamorphic belt of western Yunnan b_0 values of muscovites high-pressure metamorphism blueschist facies paleo-Tethys |
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