High-Resolution Seismic Exploration of Xiuyan Impact Crater Structures

详细信息   

• 责任者：Zhao Chengbin (Research Center of Exploration Geophysics ; CEA ; Zhengzhou 450002 ; China) ; Liu Mingjun
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(6)
• 关键词：地震勘探 ; seismic exploration
• 页码：p.1559-1565
• 图表：6 illus., 18 refs.
• 分类号：0500
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The Xiuyan impact crater with a rim-rim diameter of 1.8 km is located at northern hills in the Liaodong peninsula, Liaoning Province, China. In the project, velocity structures, stratum structures and whole configuration of the crater are gotten using the differences of seismic velocity and wave impedance from the combined exploration of reflection and refraction. Based on the reflection features, the crater body formed by the direct impact has a diameter about 1.8 km, and a depth about 800 m, and the depth affected by the impact is about 1.4 km. The crater structure is divided into 3 parts, slow deposit area, rapid deposit area and affected area. According to the seismic velocity features, the velocity at the crater center where the depth is 800 m reaches 7.0 km/s, the isoline of 7.0 km/s is consistent with the crater configuration, but the velocity reached 7.0 km/s at the depth of 500～600 m in the edge of the crater.