| 2-D crustal structure of Changbaishan-Tianchi volcanic region determined by seismic traveltime inversion |
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| 作者姓名： | 王夫运 张先康 杨卓欣 |
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| 作者单位： | Research Center of Exploration Geophysics |
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| 基金项目： | Key Project (95-11-02-01) from China Seismological Bureau.Contribution No. RCEG200129, Research Center of Exploration Geophysi |
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| 摘 要： | IntroductionTrial-and-error forward modeling of wide-angle seismic reflection/refraction traveltimes for 2-D velocity structure is extremely time-consuming, even for experienced data interpreters. For wide-angle seismic reflection/refraction experiments that consist of numerous shots along a single line, it is quite difficult through repeated trial-and-error forward modeling to construct a 2-D model that fits the data within acceptable limits (Cerveny, et al, 1977; ZHANG, et al, 200 . In ad…
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| 收稿时间： | 31 July 2001 |
| 修稿时间： | 14 December 2001 |
2-D crustal structure of Changbaishan-Tianchi volcanic region determined by seismic traveltime inversion |
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| Wang Fu-yun , Zhang Xian-kang and Yang Zhuo-xin.2-D crustal structure of Changbaishan-Tianchi volcanic region determined by seismic traveltime inversion[J].Acta Seismologica Sinica(English Edition),2002,15(2):152-161. |
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| Authors: | Wang Fu-yun Zhang Xian-kang and Yang Zhuo-xin |
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| Institution: | Research Center of Exploration Geophysics, China Seismological Bureau, Zhengzhou 450002, China |
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| Abstract: | 2-D velocity structure and tectonics of the crust and upper mantle is revealed by inversion of seismic refraction and wide-angle reflection traveltimes acquired along the profile L1 in the Changbaishan-Tianchi volcanic region. It is used in this study that seismic traveltime inversion for simultaneous determination of 2-D velocity and interface structure of the crust and upper mantle. The result shows that, under Changbaishan-Tianchi crater, there exists a low-velocity body in the shape of an inverted triangle, and the crustal reflecting boundaries and Moho all become lower by a varying margin of 2-6 km, forming a crustal root which is assumed to be the Changbaishan-Tianchi volcanic system. Finally, we make a comparison between our 2-D velocity model and the result from the studies by using trial-and-error forward modeling with SEIS83. |
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| Keywords: | seismic traveltime inversion 2-D velocity structure Changbaishan-Tianchi volcanic system |
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