| 黔桂边境四堡岩群中高压变质矿物的发现及其意义 |
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| 引用本文： | 曾昭光,唐云辉,彭慈刚,冯运富. 黔桂边境四堡岩群中高压变质矿物的发现及其意义[J]. 贵州地质, 2005, 22(1): 46-49 |
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| 作者姓名： | 曾昭光 唐云辉 彭慈刚 冯运富 |
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| 作者单位： | 贵州地矿局117地质大队,贵州,贵阳,550018;贵州地矿局117地质大队,贵州,贵阳,550018;贵州地矿局117地质大队,贵州,贵阳,550018;贵州地矿局117地质大队,贵州,贵阳,550018 |
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| 基金项目： | 为地质大调查项目,贵州1∶5万宰便、高武幅区域地质调查(编号200113000066) |
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| 摘 要： | 分布在黔桂边境地区四堡岩群变质岩属绿片岩相,过去一直认为是低压条件下的变质产物。通过近年区调工作,用X射线粉晶衍射方法,测定泥质变质岩的白云母结晶度b0>0.9040nm,显示出高压型变质矿物———多硅白云母特征。高压变质矿物的确定,对研究该区中元古代末期Rodinia超大陆的聚合提供了佐证。
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| 关 键 词： | 四堡岩群 高压变质矿物 地质意义 贵州-广西 |
| 文章编号： | 1000-5943(2005)01-0046-04 |
| 修稿时间： | 2004-08-24 |
A Discovery of High - pressure Metamorphic Minerals within the Sibao Group in Abutting Area Between Guizhou and Guangxi |
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| ZENG Zhao-guang,TANG Yun-hui,PENG Ci-gang,FENG Yun-fu. A Discovery of High - pressure Metamorphic Minerals within the Sibao Group in Abutting Area Between Guizhou and Guangxi[J]. Guizhou Geology, 2005, 22(1): 46-49 |
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| Authors: | ZENG Zhao-guang TANG Yun-hui PENG Ci-gang FENG Yun-fu |
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| Abstract: | The metamorphic rocks of Sibao Group in the border of Guizhou and Guangxi are attributed to greenschist facies, which have been considered as the products of lower-pressure condition previously. Through resent years' regional surveying, the crystallinity of muscovite is determined of b0 exceeding 0.9040nm by X-ray diffraction way, which featured the phengite as a high pressure type of metamorphic mineral. The definite high pressure mineral as an evidence contributes to researching on the aggregation of Rodinia Supercontinent at the end of Middle Proterozoic in this area. |
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| Keywords: | Sibao Group high pressure metamorphic mineral geology implication Guizhou-Guangxi-Yunnan |
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