| Study on fine structure of crust-mantle transi-tion zone in Yanqing-Hailai basin based on CDP and DSS data |
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| 作者姓名： | 成瑾 李清河 |
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| 作者单位： | JIN CHENG 1) QING HE LI 2) 1)Institute of Geophysics，State Seismological Bureau，Beijing 100081，China 2)Earthquake Research Institute of Lanzhou，State Seismological Bureau，Lanzhou 730000，China |
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| 摘 要： | ＳｔｕｄｙｏｎｆｉｎｅｓｔｒｕｃｔｕｒｅｏｆｃｒｕｓｔｍａｎｔｌｅｔｒａｎｓｉｔｉｏｎｚｏｎｅｉｎＹａｎｑｉｎｇＨａｉｌａｉｂａｓｉｎｂａｓｅｄｏｎＣＤＰａｎｄＤＳＳｄａｔａＪＩＮＣＨＥＮＧ１）（成瑾）ＱＩＮＧＨＥＬＩ２）（李清河）１）Ｉｎ...
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| 收稿时间： | 17 December 1996 |
| 修稿时间： | 13 October 1997 |
Study on fine structure of crust-mantle transition zone in Yanqing-Hailai basin based on CDP and DSS data |
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| Jin Cheng and Qing-He Li.Study on fine structure of crust-mantle transi-tion zone in Yanqing-Hailai basin based on CDP and DSS data[J].Acta Seismologica Sinica(English Edition),1998,11(1):81-88. |
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| Authors: | Jin Cheng and Qing-He Li |
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| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China;(2) Earthquake Research Institute of Lanzhou, State Seismological Bureau, 730000 Lanzhou, China |
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| Abstract: | The fine structure of crust-mantle transition zone in Yanqing-Hailai(Yan-Huai basin) basin has been analyzed and discussed
by using the data of Yanqing-Hailai deep seismic reflection profile and Beijing-Huailai-Fengzhen deep seismic sounding profile
obtained respectively in 1992 and in 1993. The primary model is established based on CDP stacking profile. The phases of seismic
refraction waves and wide angle reflection waves are analyzed, travel time inversion is carried out and 2-D ray tracing is
computed. Synthetic seismograms are completed by using reflectivity method for waveform fitting of phases PM and PM′, they are reflection waves from both the upper and the lower boundaries of the crust-mantle transition zone in this basin.
The results show that the PM′ reflection waves are stronger at some points and come from the lower boundary of Moho discontinuity. It is confirmed and
interpreted that the Moho discontinuity in Yanqing-Hailai basin consists of a group of thin layers with alternatively higher
and lower velocities.
Contribution No. 98A01002, Institute of Geophysics, State Seismological Bureau, China. |
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| Keywords: | seismic reflection and refraction Yanqing Hailai basin fine structure crust mantle transition region travel time inversion |
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