The crust structures and tectonics of Urumqi depression revealed by deep seismic reflection profile in the northern margin of Tianshan mountains
文献类型：期刊论文
| 作者 | Liu Bao-Jin; Shen Jun; Zhang Xian-Kang; Chen Yong; Fang Sheng-Ming; Song He-Ping; Feng Shao-Ying; Zhao Cheng-Bin |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2007-09-01 |
| 卷号 | 50期号:5页码:1464-1472 |
| ISSN号 | 0001-5733 |
| 关键词 | Urumqi depression deep seismic reflection profile crustal structure deep and shallow tectonic features |
| 文献子类 | Article |
| 英文摘要 | It is known from the active tectonic research results that the northern margin of Tianshan mountains is characterized with typical intra-continental active tectonics, which has thrust faults and anticlines with multiple parallel mountains. In order to investigate the fine crustal structures and the main fault geometries as well as the deep-shallow tectonic relations in Urumqi depression, a deep seismic reflection profile of 78 km long, running in nearly SN direction, was completed in 2004. This profile is located in the transition zone between Tianshan mountains and Junggar Basin of the western]Urumqi. The results show that the crust beneath the investigated area is divided into upper and lower crusts by a strong reflective zone with about 9 similar to 10.5 s TWT. The thicknesses of the upper and lower crusts are about 26 similar to 28 km, 23 similar to 25 km, respectively. There are rich reflective layers and clear tectonic patterns above 5s TWT while presenting obviously different tectonic features along the profile. In the southern region of Xishan, the stacked deep seismic reflection section has a series of thrust anticlines extending in the EW direction and arranging in the SN as well as a group of faults thrusting from south to north. All of those are influenced by the deep detachment zone. In the Xishan and Wangjiagou area, it shows a set of steeply north-dipping reflective layers and a group of faults slipping along the layers. The northern part of the profile shows the images of typical sediment basin and its deepest depth is about 10 similar to 12 kin. Between 6 and 9 s TWT, the stacked deep seismic reflection section shows disordered reflections with comparatively short continuing time and weak energy. These indicate that this part of the crust is evidently possessed with "reflection transparence". The Moho transition zone occurs at 14 similar to 17 s TWT, and the zone thickness is about 9 similar to 10 km. In the studied area, the Moho discontinuity gradually deepens from north to south. Its depth is about 50 similar to 52 km at the northern segment of the profile and is about 54 similar to 55 km near north Tianshan. In the neighbourhood of Xishan at the middle profile, the reflections from the boundary between upper and lower crusts as well as Moho transition zone become misty while the shallow stratums show signs of uplift and fold, which may have something to do with the extrusions between Junggar basin and Tianshan mountains. |
| WOS关键词 | TIEN-SHAN ; CHINA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000249679300022 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68307]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu Bao-Jin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Geophys Prospecting Ctr, China Earthquake Adm, Zhengzhou 450002, Peoples R China 3.Earthquake Adm Xinjiang Uygur Autonom Reg, Urumqi 8300011, Peoples R China 4.Inst Geophys, China Earthquake Adm, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu Bao-Jin,Shen Jun,Zhang Xian-Kang,et al. The crust structures and tectonics of Urumqi depression revealed by deep seismic reflection profile in the northern margin of Tianshan mountains[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2007,50(5):1464-1472. |
| APA | Liu Bao-Jin.,Shen Jun.,Zhang Xian-Kang.,Chen Yong.,Fang Sheng-Ming.,...&Zhao Cheng-Bin.(2007).The crust structures and tectonics of Urumqi depression revealed by deep seismic reflection profile in the northern margin of Tianshan mountains.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,50(5),1464-1472. |
| MLA | Liu Bao-Jin,et al."The crust structures and tectonics of Urumqi depression revealed by deep seismic reflection profile in the northern margin of Tianshan mountains".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 50.5(2007):1464-1472. |
入库方式： OAI收割
来源：地质与地球物理研究所
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