• 责任者：Gao Jinggang (Key Laboratory of Western China’s Mineral Resources and Geological Engineering ; Ministry of Education ; College of Earth Science and Resources ; Chang’an University ; Xi’an 710054 ; China) ; Li Wenyuan
• 刊名：Xinjiang Geology
• 出版年：2013
• 卷期：31(2)
• 关键词：辉绿岩 ; diabase ; 铀—铅计时 ; U-Pb dating ; 博格达山 ; Bogeda Mountains
• 页码：p.117-123
• 图表：7 illus., 3 tables, 20 refs.
• 分类号：0801
• issnNo：ISSN1000-8845
• isbnNo：CN65-1092/P

     The Late Carboniferous Diabase in bogda orogenic belt provides important information on the bogda rift tectonic evolution. The geochemistry of the major is characterized by low contents of TiO₂ (0.81% ~2.1%), MgO(5.83% ~ 10.48%), K₂O and P₂O₅, high Al₂O₃ and low K₂O /Na₂O ration. The above characteristics indicate that magma source are originated from depleted mantle of contamination by crustal materials. Using LA-ICP-MS method of U-Pb age dating, it is the hansi-font-family: calibri; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: ’times new roman’">（300.5±1.7hansi-font-family: calibri; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: ’times new roman’">） Ma(MSWD=2.3, Th/U =0.36~1.33)that represents the crystallized age of the diabase.It represents the important conversion from compression to extension in Geodynamics.