| 滇西澜沧变质带中白云母b_0值特征及其多期变质作用意义 |
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| 引用本文： | 赵靖,钟大赉,王毅.滇西澜沧变质带中白云母b_0值特征及其多期变质作用意义[J].矿物岩石,1993(1). |
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| 作者姓名： | 赵靖 钟大赉 王毅 |
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| 作者单位： | 北京大学地质系，中国科学院地质研究所，中国科学院地质研究所 北京 100871，北京 100029，北京 100029 |
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| 摘 要： | 滇西澜沧变质带中199件白云母b_0值分析结果表明,b_0值均在0.9020nm以上。与澜沧变质带遭受蓝片岩相高压变质作用的事实相吻合。此外,白云母b_0值的统计规律显示,澜沧变质带经历了多期变质作用,一期为高压变质作用,另一期为中压变质作用,这也与已知的地质现象相符。由此可见,白云母b_0值可以很好地反映多期变质作用。
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| 关 键 词： | 滇西澜沧变质带 白云母b_0值 多期变质作用 蓝片岩相相对地质压力计 |
FEATURES OF MUSCOVITE b_0 VALUES AND ITS IMPLICATION OF POLY-PHASE METAMORPHISM FROM LANCANG METAMORPHIC BELT, WESTERN YUNNAN |
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| Zhao Jing.FEATURES OF MUSCOVITE b_0 VALUES AND ITS IMPLICATION OF POLY-PHASE METAMORPHISM FROM LANCANG METAMORPHIC BELT, WESTERN YUNNAN[J].Journal of Mineralogy and Petrology,1993(1). |
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| Authors: | Zhao Jing |
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| Abstract: | Results obtained from measurement of 199 b_0 values of K-micas, which were sampled from Lancang metamorphic belt,Western Yunnan indicate that the b_0 values of K-micas represent completly regional high-pressure metamorphism occurring in Lancang metamorphic belt (with the bo values are more than 0. 902 0nm). This conclusion is consistent with the blueschist rock outcrops in this metamorphic belt. In this region there are not characteristic zonation of the b_0 values of K-micas. In addition, normal distribution curve of the b_0 values of K-micas indicates that muscovites are crystalized by poly-phase metamorphism. |
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| Keywords: | Lancang metamorphic belt b_(0) values of muscovite poly-phase metamorphism blueschist phase relative geobarometer |
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