| Velocity structure of the crust and upper mantle in Xingtai earthquake region and its adjacent area |
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| 引用本文： | 祝治平,张称康,盖玉杰,张建狮,聂文英,石金虎,张成科,阮红.Velocity structure of the crust and upper mantle in Xingtai earthquake region and its adjacent area[J].地震学报(英文版),1995,8(3):405-412. |
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| 作者姓名： | 祝治平 张称康 盖玉杰 张建狮 聂文英 石金虎 张成科 阮红 |
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| 作者单位： | Geophysical Prospecting Brigade，State Seismological Bureau，Zhengzhou 450003，China |
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| 摘 要： | ＶｅｌｏｃｉｔｙｓｔｒｕｃｔｕｒｅｏｆｔｈｅｃｒｕｓｔａｎｄｕｐｐｅｒｍａｎｔｌｅｉｎＸｉｎｇｔａｉｅａｒｔｈｑｕａｋｅｒｅｇｉｏｎ ａｎｄ ｉｔｓａｄｊａｃｅｎｔａｒｅａＺｈｉ－ＰｉｎｇＺＨＵ；（祝治平）Ｘｉａｎ－ＫａｎｇＺＨＡＮＧ；（张称康）Ｙｕ...
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| 收稿时间： | 25 May 1994 |
| 修稿时间： | 5 December 1994 |
Velocity structure of the crust and upper mantle in Xingtai earthquake region and its adjacent area |
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| Zhi-Ping Zhu, Xian-Kang Zhang, Yu-Jie Gai, Jian-Shi Zhang, Wen-Ying Nie, Jin-Hu Shi, Cheng-Ke Zhang and Hong Ruan.Velocity structure of the crust and upper mantle in Xingtai earthquake region and its adjacent area[J].Acta Seismologica Sinica(English Edition),1995,8(3):405-412. |
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| Authors: | Zhi-Ping Zhu Xian-Kang Zhang Yu-Jie Gai Jian-Shi Zhang Wen-Ying Nie Jin-Hu Shi Cheng-Ke Zhang and Hong Ruan |
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| Institution: | (1) Geophysical Prospecting Brigade, State Seismological Bureau, 450003 Zhengzhou, China |
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| Abstract: | Two seismic refraction profiles which are perpendicular to each other, running through Xingtai earthquake region,reveal the anomalous variations of crust-mantle velocity structure and deep tectonics. Pg wave attenuatesrapidly with distance in the earthquake region. A group of strong reflections from a depth of 21. 0 km can be identified along the section from Longyao to the piedmont of Taihang Mountain, but P. waves characterized generally by strong amplitude are not obvious. Under the earthquake region and its western neighboring region, thecrustal velocity structure features high and low velocities changed alternatively. From North China plain toShanxi plateau, the velocity at the top of the upper mantle decreases progressively, while crustal thickness increases by 11 km. Moho uplifts locally in the earthquake region. The crustal fault stretching deeply to Moho andthe discontinuous sections of Moho in the earthquake region are supposed to be the channels and zones for magmatic intrusion. The uplifting of upper mantle and magmatic intrusion are responsible for the formation ofanomalous crust-mantle structures and extending basins, and for the occurrence of Xingtai earthquake as well. |
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| Keywords: | velocity structure lower crust upper crust upper mantle refraction |
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