The Age of Piqiang Gabbroid, NW Margin of
- 责任者：Zhou Lixia (South West Petroleum University ; Chengdu 610500 ; China) ; Hu Shiling
- 刊名：Chinese Journal of Geology
- 出版年：2010
- 卷期：45(4)
- 关键词：辉长岩 ; gabbros ; 塔里木盆地 ; Tarim Basin
- 页码：p.1057-1065
- 图表：5 illus., 1 table, 17 refs.
- 分类号：0801
- issnNo：ISSN0563-5020
- isbnNo：CN11-1937/P
Piqiang gabbroid is 15 km north of Piqiang village，west Keping fold-thrust belt，Tarim Basin. The country rocks of Piqiang gabbroid include Silurian，Devonian，Carboniferous and Permian-Neogene and Quaternary uncomfortably overly on it. Gabbro sample was collected at the SE margin of Piqiang gabbroid for individual mineral separating. Plagioclase was selected for Ar-Ar dating. 8 heating stages of 700～1 400 ℃ gaves a stable plateau with the plateau age of (265.5±1.2) Ma. The related isochronal age is (267.29±5.62) Ma. Consulting with the regional geological data，Piqiang gabbroid intruded at early Middle Permian，without obvious influence of tectonic-thermo event after the intrusion.