Rock-magnetism, magnetic fabric and kinematic vorticity analysis of the Shagoujie shear zone, Qinling orogen
文献类型：期刊论文
| 作者 | Li Yang1; Liang WenTian1; Jin ChunSheng2; Dong YunPeng1; Yuan HongLin1; Zhang GuoWei1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2017 |
| 卷号 | 33期号:6页码:1919-1933 |
| 关键词 | Magnetic fabric Kinematic vorticity Microstructure Rock magnetism Shagoujie shear zone Qinling orogen |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Shagou shear zone, located in the Shangdan belt of East Qinling, is characterized by ductile deformation, which can contribute to constrain the Late Triassic tectonic setting of the Qinling orogen. In order to probe its kinematics and further to explore the dynamic mechanism, mylonite samples were analyzed in terms of anisotropy of magnetic susceptibility (AMS) and kinematic vorticity W-k) on the basis of the field observations and microstructural analyses. The values of mean susceptibility (K-m) show a wide variation range, which means that the ferromagnetic mineral like magnetite acted as the dominant magnetic carrier of the samples. The corrected anisotropy degree (P-J) are relatively large indicative of a strong structural deformation. Shape parameter (T) are generally more than zero, indicating that the susceptibility ellipsoid of the Shagoujie shear zone is mainly oblate. Magnetic fabrics, defined by AMS ellipsoids, is relatively well consistent with the mineral fabrics. Combined with the magnetic fabrics and the attitude of the boundary fault or the C-foliation, it can be concluded that the Shagoujie shear zone showing a sinistral transpressional kinematic. Furthermore, Wk and its distribution patterns reflect that the core of the Shagoujie shear zone is located in northern boundary fault, and it also demonstrates that pure shear component is the dominant shear force during the formation process of the Shagoujie shear zone. Taken together, the kinematics of the Shagoujie shear zone suggest that it was formed in a local transpressional setting under oblique convergence. What's more, Late Triassic bilateral extrusion tectonics of the Qinling orogen may explain the plain fact that the Shagoujie shear zone has a completely opposite kinematic with the coeval shear zone located in the western Shangdan belt. |
| WOS关键词 | CHINA ; ANISOTROPY ; DEFORMATION ; STRAIN ; SUSCEPTIBILITY ; FLOW ; DIRECTION ; YUNNAN ; BELT ; AMS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000406212700018 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61844]  |
| 专题 | 地质与地球物理研究所_中国科学院新生代地质与环境重点实验室 |
| 通讯作者 | Liang WenTian |
| 作者单位 | 1.Northwest Univ Xian, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Yang,Liang WenTian,Jin ChunSheng,et al. Rock-magnetism, magnetic fabric and kinematic vorticity analysis of the Shagoujie shear zone, Qinling orogen[J]. ACTA PETROLOGICA SINICA,2017,33(6):1919-1933. |
| APA | Li Yang,Liang WenTian,Jin ChunSheng,Dong YunPeng,Yuan HongLin,&Zhang GuoWei.(2017).Rock-magnetism, magnetic fabric and kinematic vorticity analysis of the Shagoujie shear zone, Qinling orogen.ACTA PETROLOGICA SINICA,33(6),1919-1933. |
| MLA | Li Yang,et al."Rock-magnetism, magnetic fabric and kinematic vorticity analysis of the Shagoujie shear zone, Qinling orogen".ACTA PETROLOGICA SINICA 33.6(2017):1919-1933. |
入库方式： OAI收割
来源：地质与地球物理研究所
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