Study on finite strain and its relationship with magnetic fabric along Ailao Shan-Red River shear zone
文献类型：期刊论文
| 作者 | Zhou, Y; Wu, SM; Qiu, XL; Zhou, P |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2003-10-16 |
| 卷号 | 108期号:B10 |
| 关键词 | finite strain anisotropy of magnetic susceptibility relationship between petrofabric and magnetic fabric Ailao Shan-Red River shear zone |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2003JB002428 |
| 文献子类 | Article |
| 英文摘要 | [1] The finite strain along Ailao Shan-Red River shear zone has been studied. The axial ratios of strain markers and shear strains vary greatly, arising principally from deformation intensity and from contrasting competencies. Ellipticity of chloritic amygdales in basalt ranges from 6.79 to 10.47 (corresponding shear strain gamma(xz) = 2.22-2.93), and ellipticity of garnets from 1.56 to 2.95 (gamma(xz) = 0.45-1.14) in core gneiss. The S-C angle of the sheared rocks varies from 2degrees to 28degrees (gamma(sc) = 1.35-28.60), mostly in a range 2degrees to 7degrees. Optical observation, thermal demagnetization, and hysteresis curves were conducted to determine the nature of minerals and the contribution of paramagnetic and ferromagnetic minerals to magnetic susceptibility. The result shows that ferromagnetic minerals and hornblende dominate the magnetic fabric of samples with high to very high susceptibility, and play an important role in the magnetic fabric of samples with low to intermediate susceptibility. The ferromagnetic minerals are mainly pseudo-single-domain and multidomain Ti-poor magnetite. Most samples have their magnetic lineation lying between the C and S surfaces. In the remaining samples, deviations from this common alignment principally resulted from the magnetic minerals being deflected by porphyroclasts, mineral cleavage, and cracks. The axial ratio correlation is very poor between the magnetic and actual or imaginary strain ellipsoid calculated from the S-C fabric. This poor correlation suggests that the shape of the finite strain ellipsoid cannot be evaluated using the magnetic fabric when the latter is a combined result from multiple minerals, and especially when the shape effect of multidomain titanomagnetite is important. |
| WOS关键词 | PARAMAGNETIC COMPONENTS ; HYSTERESIS PROPERTIES ; LOW-FIELD ; SE ASIA ; SUSCEPTIBILITY ; ANISOTROPY ; CHINA ; YUNNAN ; DEFORMATION ; RESOLUTION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000186090100007 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78169]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhou, Y |
| 作者单位 | 1.Acad Sinica, Inst Geol & Geophys, LTE, Beijing 100029, Peoples R China 2.China Univ Geosci, Grad Sch, Beijing 100083, Peoples R China 3.Acad Sinica, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Y,Wu, SM,Qiu, XL,et al. Study on finite strain and its relationship with magnetic fabric along Ailao Shan-Red River shear zone[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2003,108(B10). |
| APA | Zhou, Y,Wu, SM,Qiu, XL,&Zhou, P.(2003).Study on finite strain and its relationship with magnetic fabric along Ailao Shan-Red River shear zone.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,108(B10). |
| MLA | Zhou, Y,et al."Study on finite strain and its relationship with magnetic fabric along Ailao Shan-Red River shear zone".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 108.B10(2003). |
入库方式： OAI收割
来源：地质与地球物理研究所
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