Plastic flow of ultrahigh pressure metamorphic rocks: microstructure and deformation mechanisms.
文献类型：期刊论文
| 作者 | Zhao, ZY; Fang, AM |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2005-07-01 |
| 卷号 | 21期号:4页码:1109-1116 |
| 关键词 | Uhp Deformation Plastic Deformation Microstructures Deformation Mechanisms |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Ultrahigh pressure (UHP) metamorphic rocks are products of deep continental subduction and have experienced long distance transportation and subjected to tectonic stresses during deep continental subduction and rapid exhumation. High strain and strong plastic deformation are mainly concentrated into ductile shear zones. Study of structures, microstructures and deformation mechanisms of the UHP rocks is important in understanding the rheological behavior of continental crust in the deep subduction processes. The eclogite and granitic mylonites in the ultrahigh pressure ductile shear zone at Yangkou, Shangdong Province, have recorded UHP deformation history of the rocks. Minerals stable at UHP conditions, omphacite, phengite, kyanite and K-feldspar have irregular undulatory extinction, subgrain boundary, core-mantle Structure and dynamic recrystallization microstructures, indicating dislocation creep is a major deformation mechanism. TEM also reveals abundant dislocation structures, edge and screw dislocations, tilt and twist walls. In granitic mylonite rutile precipitates preferentially in the pressure shadows of porphyroclasts and garnet occurs as fine grains in narrow zones parallel to foliation, which all suggest that fluid is present in deformation of the UHP rocks and fluid - enhance diffusion mass transfer is another important deformation mechanism during UHP deformation. Stress level is estimated at tens of MPa based on existing flow laws. |
| WOS关键词 | DORA-MAIRA MASSIF ; EASTERN CHINA ; COESITE ; EXHUMATION ; SUBDUCTION ; TERRANE ; UHP ; RHEOLOGY ; ECLOGITE ; ZONES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000232291300009 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65850]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhao, ZY |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, ZY,Fang, AM. Plastic flow of ultrahigh pressure metamorphic rocks: microstructure and deformation mechanisms.[J]. ACTA PETROLOGICA SINICA,2005,21(4):1109-1116. |
| APA | Zhao, ZY,&Fang, AM.(2005).Plastic flow of ultrahigh pressure metamorphic rocks: microstructure and deformation mechanisms..ACTA PETROLOGICA SINICA,21(4),1109-1116. |
| MLA | Zhao, ZY,et al."Plastic flow of ultrahigh pressure metamorphic rocks: microstructure and deformation mechanisms.".ACTA PETROLOGICA SINICA 21.4(2005):1109-1116. |
入库方式： OAI收割
来源：地质与地球物理研究所
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