Elliptical anisotropy above the crystalline basement from wide-aperture Pg events
文献类型：期刊论文
| 作者 | Zhang, Anjia; Zhang, Zhongjie |
| 刊名 | JOURNAL OF SEISMIC EXPLORATION
 |
| 出版日期 | 2008-04-01 |
| 卷号 | 17期号:2-3页码:195-208 |
| 关键词 | continuous medium crystalline basement Pg event wide-angle seismic profiling traveltime |
| ISSN号 | 0963-0651 |
| 文献子类 | Article |
| 英文摘要 | Traveltime data of Pg events, which are refractions from the crystalline basement (CB) in the control led-source wide-aperture seismic sections, provide key constraints on the construction of shallow seismic structures above the crystalline basement. Since sedimentary rock is usually considered to be anisotropic because of the preferred alignment of microcracks and thin layering in the upper crust. So the interpretation of Pg events needs to account for seismic velocity anisotropy. For this reason, it is the prerequisite to establish traveltime-offset relationship for Pg events in anisotropic media. Here, we first derive a traveltime-offset relationship for Pg waves by assuming a model with a linear velocity increase; then we present a scheme to invert Pg traveltime-offset data for velocity anisotropy in shallow crustal structures. We compare the Pg traveltimes calculated by our analytic equation with raytracing to test the accuracy. Finally, real data from the deep-seismic reflection profiles in the southeast China are analyzed to demonstrate the potential of our method. |
| WOS关键词 | SCANNING LASER MICROSCOPY ; MANTLE ; MEDIA ; CRUST |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000256224700008 |
| 出版者 | GEOPHYSICAL PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70032]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, Anjia |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Anjia,Zhang, Zhongjie. Elliptical anisotropy above the crystalline basement from wide-aperture Pg events[J]. JOURNAL OF SEISMIC EXPLORATION,2008,17(2-3):195-208. |
| APA | Zhang, Anjia,&Zhang, Zhongjie.(2008).Elliptical anisotropy above the crystalline basement from wide-aperture Pg events.JOURNAL OF SEISMIC EXPLORATION,17(2-3),195-208. |
| MLA | Zhang, Anjia,et al."Elliptical anisotropy above the crystalline basement from wide-aperture Pg events".JOURNAL OF SEISMIC EXPLORATION 17.2-3(2008):195-208. |
入库方式： OAI收割
来源：地质与地球物理研究所
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