• 责任者：Fu Xiugen (Chengdu Institute of Geology and Mineral Resources ; China Geological Survey ; Chengdu 610081 ; China) ; Wang Jian
• 刊名：Geological Bulletin of China
• 出版年：2009
• 卷期：29(5)
• 关键词：火山岩 ; volcanic rocks ; 铀—铅计时 ; U-Pb dating ; 羌塘盆地 ; Qiangtang Basin
• 页码：p.561-567
• 图表：3 illus., 1 table, 21 refs.
• 分类号：0801
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

A suite of volcanic rocks to volcaniclastic rocks overlie the Triassic E’erlongba Formation in the eastern part of Qiangtang Basin, northern oft-com:office:smarttags" />Tibet, China. The SHRIMP zircon U-Pb ages of the lower basalt from this stratum can be categorized into two groups: (220.4±2.3) Ma and (241.4±3.6) Ma, respectively. The former represents magma emplacement age of the E’erlongba Formation volcanic rocks in the eastern part of the Qiangtang Basin region, while the latter is related to collision and uplift events during Middle Triassic period. Early stage sedimentation of basin evolvement during Mesozoic went through an overlapping process from continental to marine facies, sedimentary overlap started from the alluvial/fluvial facies, along with intrusion, eruption and pyroclastic sedimentation, reflecting an upward deepened transgression sequence, which indicates a rift basin.oft-com:office:office" />