| Basement interface structural characteristics beneath Jiashi strong earthquake swarm area in Xinjiang, China |
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| 作者姓名： | 徐朝繁 段永红 田晓峰 潘纪顺 张建狮 胡修奇 |
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| 作者单位： | Geophysical Exploration Center China Earthquake Administration，Geophysical Exploration Center China Earthquake Administration，Geophysical Exploration Center China Earthquake Administration，Geophysical Exploration Center China Earthquake Administration，Geophysical Exploration Center China Earthquake Administration，Earthquake Administration of Henan Province，Zhengzhou 450002 China，Zhengzhou 450002 China，Zhengzhou 450002 China，Zhengzhou 450002 China，Zhengzhou 450002 China，Zhengzhou 450000 China |
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| 基金项目： | Foundation item： Joint Seismological Foundation of China （106076） and National Natural Science Foundation of China （40474049, 40334040）.Contribution No. 06020, Geophysical Exploration Center, China Earthquake Administration. |
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| 摘 要： | The seismic data obtained from high resolution seismic refraction profile in Jiashi strong earthquake swarm area in Xinjiang, China were further processed with ray hit analysis method and more complete basement interface struc-tural characteristics beneath Jiashi strong earthquake swarm area were determined. The results show that there are two clear basement interfaces at the upper crust in Jiashi strong earthquake swarm area. The first one with buried depth ranging from 2.6 km to 3.3 km presents integral and continuous structure, and it appears an inclined plane interface and smoothly rises up toward Tianshan Mountain. The second basement interface with buried depth from 8.5 km to 11.8 km, is the antiquated crystalline basement of Tarim basin. Near the post number of 37 km, the bur-ied depth of the crystalline basement changed abruptly by 2.5 km, which maybe result from an ultra crystalline basement fault. If taking this fault as a boundary, the crystalline basement could be divided into two parts, i.e. the southwestern segment with buried depth about 11.5 km, and the northeastern segment with buried depth approxi-mately from 8.5 km to 9.0 km. That is to say, in each segment, the buried depth changes not too much. The north-east segment rises up as a whole and upheaves slightly from southwest to northeast, which reflects the upper crustal deformation characteristics under the special tectonic background at the northwestern edge of Tarim basin.
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| 关 键 词： | 新疆 地震 密集范围 地下室 |
| 文章编号： | 1000-9116（2007）05-0507-06 |
| 收稿时间： | 30 December 2006 |
| 修稿时间： | 2006-12-30 |
Basement interface structural characteristics beneath Jiashi strong earthquake swarm area in Xinjiang, China |
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| Xu Zhao-fan , Duan Yong-hong , Tian Xiao-feng , Pan Ji-shun , Zhang Jian-shi and Hu Xiu-qi.Basement interface structural characteristics beneath Jiashi strong earthquake swarm area in Xinjiang, China[J].Acta Seismologica Sinica(English Edition),2007,20(5):507-512. |
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| Authors: | Xu Zhao-fan Duan Yong-hong Tian Xiao-feng Pan Ji-shun Zhang Jian-shi and Hu Xiu-qi |
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| Institution: | 1.Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China; 2. Earthquake Administration of Henan Province, Zhengzhou 450000, China |
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| Abstract: | The seismic data obtained from high resolution seismic refraction profile in Jiashi strong earthquake swarm area in Xinjiang, China were further processed with ray hit analysis method and more complete basement interface struc- tural characteristics beneath Jiashi strong earthquake swarm area were determined. The results show that there are two clear basement interfaces at the upper crust in Jiashi strong earthquake swarm area. The first one with buried depth ranging from 2.6 km to 3.3 km presents integral and continuous structure, and it appears an inclined plane interface and smoothly rises up toward Tianshan Mountain. The second basement interface with buried depth from 8.5 km to 11.8 km, is the antiquated crystalline basement of Tarim basin. Near the post number of 37 km, the bur- ied depth of the crystalline basement changed abruptly by 2.5 km, which maybe result from an ultra crystalline basement fault. If taking this fault as a boundary, the crystalline basement could be divided into two parts, i.e. the southwestern segment with buried depth about 11.5 km, and the northeastern segment with buried depth approxi- mately from 8.5 km to 9.0 km. That is to say, in each segment, the buried depth changes not too much. The north- east segment rises up as a whole and upheaves slightly from southwest to northeast, which reflects the upper crustal deformation characteristics under the special tectonic background at the northwestern edge of Tarim basin. |
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| Keywords: | Jiashi strong earthquake swarm area high resolution refraction survey ray hit analysis method basement interface structure ultra crystalline basement fault |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
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