Shock-Metamorphic Features of Quartz in Xiuyan Crater
详细信息
- 责任者：Chen Ming (State Key Laboratory of Isotope Geochemistry ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China)
- 刊名：Acta Mineralogica Sinica
- 出版年：2011
- 卷期：31(2)
- 关键词：石英 ; quartz ; 冲击变质作用 ; shock metamorphism ; 辽宁 ; Liaoning Province
- 页码：p.161-165
- 图表：7 illus., 14 refs.
- 分类号：0700
- issnNo：ISSN1000-4734
- isbnNo：CN52-1045/P
摘要
The 1.8 km-diameter Xiuyan crater is located in Xiuyan County of Liaoning Province. The basement rock of the crater is made up of the Early Proterozoic metamorphic rocks composed of granulite, gneiss, hornblendite, tremolite marble, marble and so on. Quartz from the impact breccia filling in the inner crater shows typical features of shock metamorphism, including the planar deformation features (PDFs) along the crystallographic orientation of quartz on(0001), {1011}, {1012} and {1013} and so on, as well as the occurrence of silica glass and coesite formed through phase transformation of quartz. The existence of coesite and PDFs in quartz provides diagnostic evidence for shock metamorphism of minerals in Xiuyan crater.