Primary Deformation Analyses of High Pressure Metamorphic Rock in Western Dabie Mountain Area中国地质大学学报：英文版论文
【题名】：Primary Deformation Analyses of High Pressure Metamorphic Rock in Western Dabie Mountain Area中国地质大学学报：英文版论文(Primary Deformation Analyses of High Pressure Metamorphic Rock in Western Dabie Mountain AreaZhongGuoDiZhiDaXueXueBao：YingWenBanLunWen) 【关键词】：构造地质学 柯石英 榴辉岩 岩石学 超高压变质岩 大别山 【keywords】：GouZaoDiZhiXue KeShiYing LiuHuiYan YanShiXue ChaoGaoYaBianZhiYan DaBieShan 【作者】：WeiChangshan,LuGuxian,ZhangYeming,XiongChengyun,      【来源】： 知识词典 【期刊名称】：中国地质大学学报：英文版(ZhongGuoDiZhiDaXueXueBao：YingWenBan) 【国际标准刊号】：1002-0705        【国内统一刊号】：42-1279/P 【作者单位】：[1]InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China [2]YichangInstituteofGeologyandMineralResources,Yichang443003,China([1]InstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100081,China [2]YichangInstituteofGeologyandMineralResources,Yichang443003,China) 【分类号】：P588.3      【页码】：-220-223      【出版年】：2004.2         In the western Dabie Mountain area, the eclogites have similar compositions and tectonic environment, which could be contrastively researched. Except for the reservation of the early structural deformation inside and outside of the eclogite lens, there is no obvious difference between the characteristics of the foliation and lineation in the eclogite lens from the one in surroumding region. So this paper concludes that the eclogites or blueschists (high pressure metamorphic rocks, i. e. HPM) are basically situated in the original position. The eclogites are mostly superposed by the ductile shear zone and show the feature of structural displacement, but so far we have not discovered any large-scale structural zone to uplift eclogite return. Based on the analyses of finite strain measure, petrofabric analysis and TEM image for some minerals such as quartz and garnet, we could efficiently know the deforming characteristics of the eclogite in the prophase and anaphase of the main deforming epoch, and finally determine the forming condition of eclogite according to the strain and the differential stress. This paper puts forward preliminary conclusion that some HPM rocks could be formed by the deep-layer embedding and local stress concentration in the process of regional metamorphism.
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