A study on the basement tectonic units in the northeast margin of Tibetan plateau-the result of Maduo-Gonghe-Yabrai refraction profile

作者：Guo Wen Bin; Jia Shi Xu^*; Duan Yong Hong; Wang Fu Yun

来源：Chinese Journal of Geophysics, 2016, 59(10): 3627-3636.

DOI：10.6038/cjg20161010

• Regularization inversion
• Basement structure
• Bayan Har Block
• Eastern Kunlun-Western Qinling Fold Belt
• Qilianshan Fold Belt
• Alxa Block

The regularization inversion is used to get the basement structure of Maduo-Gonghe-Yabrai profile with the travel time data of refraction wave Pg and Psed. The checkerboard test, resolvability method and travel-time fitting are used to prove the reliability of the inversion. We got the features of the sedimentary cover and crystalline basement along the 850 km profile. The result shows the lithology and the depth of the four first-order tectonic units (Bayan Har Block, Eastern Kunlun-Western Qinling fold belt, the east side of Qilianshan fold belt and Alxa Block) and the secondary structure inside them. The properties and transformations of the crystalline basement are revealed too. On this basis, the upper crust structure coupling among blocks is analyzed. The relationships between the upper structures and the surface are also analyzed.

• 出版日期2016-10
• 单位中国地震局; 中国地震局地球物理勘探中心