Advances in Earth Science ›› 2007, Vol. 22 ›› Issue (8): 835-841. doi: 10.11867/j.issn.1001-8166.2007.08.0835

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A Study of Crust Structure Beneath Himalaya Mountain Using Transform Function Method

SU You-liang 1,2, GUO Zhi 1,2, WANG Wei-min 1, GAO Xing 1   

  1. 1.Institute of Tibetan Plateau, Chinese Academy of Sciences, Beijing 100085, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100039,China
  • Received:2007-05-15 Revised:2007-06-27 Online:2007-08-10 Published:2007-08-10

SU You-liang, GUO Zhi, WANG Wei-min, GAO Xing. A Study of Crust Structure Beneath Himalaya Mountain Using Transform Function Method[J]. Advances in Earth Science, 2007, 22(8): 835-841.

An integrated obserrational station was established for studying geological structure and climate feedback effect in Himalaya mountain region, the station began to operate and gather from the late half of 2004. The research conducted in the station included atmospheric boundary layer research including radiation and soil observation, atmospheric turbulence and radiation system research, wind temperature profile research, radiosonde observation research, sand and dust storm observation, glacier change observation, environmental study of surface process and geodynamic research. In August, 2005, a broadband seismometer(model is Reftek 130 and pendulum is STS2) was installed in this station for studying the crust structural beneath Himalaya mountain, we collected first data in May 2006. In this paper, based on threecomponenets teleseismic records from broadband seismometer, the S wave velocity structure beneath the Himalaya was investigated by using the transform function method and the simulated annealing techique. The result shows that, the Moho depth is 70 km beneath Himalaya Mountain and the crust structure is complex. Particularly, there exists lowvelocity and highvelocity interlock exist in upper or middle crust. It indicates that tectonic movement and substance exchange are active in the plate boundary regions where the crust remains in the state of imbalance. This study will provide credible geophysical evidence for the study of geological structure and climate feed back effect in Himalaya region.

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