Structure of the Seismic Wave Property and Lithology Deduction of the Upper Crust Beneath the Yinshan Orogenic Belt and the Northern Ordos Block

详细信息   

• 责任者：Zhang Yongqian (Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Teng Jiwen
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(1)
• 关键词：上地壳 ; upper crust ; 速度结构 ; velocity structure ; 鄂尔多斯盆地 ; Ordos Basin ; 阴山 ; Yinshan Mountains
• 页码：p.87-97
• 图表：8 illus., 31 refs.
• 分类号：0400
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

A deep seismic wide-angle reflection/refraction sounding profile was set across the Yinshan orogenic belt and the northern Ordos Basin. Using the travel time data obtained from the seismic sounding record, the authors determined the S wave velocity structure of the upper crust beneath the profile. Based on the seismic wave field properties and structure, as well as the geological research result and the borehole data, the lithological distribution beneath the profile was deducted. The result suggests that this profile could be divided into four major parts, which are the northern part of the Ordos Basin, the Hubao Depression basin, Yinshan orogenic belt and the Sunit fold system. There exist different characteristics in velocity structure, Poisson ratio distribution, and lithological composition in these four tectonic units.