Xiuyan crater, China: Impact origin confirmed  

作　　者：CHEN Ming XIAO WanSheng XIE XianDe TAN DaYong CAO YuBo 

机构地区：[1]Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

出　　处：《Chinese Science Bulletin》2010年第17期1777-1781,共5页

基　　金：supported by the Knowedge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-140);The National Natural Science Foundation of China (40872041);the President Foundation of Chinese Academy of Sciences (2007)

摘　　要：The well-preserved 1.8-km-diameter Xiuyan crater is located in the low mountain-hill region of the northern part of Liaodong Peninsula of northern China. Recently, a 307-m-deep borehole at the centre of crater became available. After penetrating 107 m lacustrine sediments, a breccia lens about 188 m in thickness was encountered. The crater-fill breccia is deposits of rock clasts and fragments more or less shock-metamorphosed. The features of geological structure and stratigraphic configuration within the crater, shock-melted rocks, and PDFs in quartz found in the basement rocks close to the crater rim and in the crater-fill breccia provide clear evidence for an impact origin of the Xiuyan crater.The well-preserved 1.8-km-diameter Xiuyan crater is located in the low mountain-hill region of the northern part of Liaodong Peninsula of northern China. Recently, a 307-m-deep borehole at the centre of crater became available. After penetrating 107 m lacustrine sediments, a breccia lens about 188 m in thickness was encountered. The crater-fill breccia is deposits of rock clasts and fragments more or less shock-metamorphosed. The features of geological structure and stratigraphic configuration within the crater, shock-melted rocks, and PDFs in quartz found in the basement rocks close to the crater rim and in the crater-fill breccia provide clear evidence for an impact origin of the Xiuyan crater.

关 键 词：陨石坑 岫岩 中国 湖泊沉积物 火山口 角砾岩 北部地区 冲击变质 

分 类 号：P185.83[天文地球—天文学]