40Ar/39Ar Dating for Cenozoic Potassic Volcanic Rocks in Northern Gemucuo from Qiangtang, Northern Tibet, <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:country-region w:st="on"><st1:place w:st="on">China</st1:place></st1:country-region> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

⁴⁰Ar/³⁹Ar Dating for Cenozoic Potassic Volcanic Rocks in Northern Gemucuo from Qiangtang, Northern Tibet, China

详细信息

责任者：Zhai Qingguo (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Li Cai
刊名：Geological Bulletin of China
出版年：2009
卷期：28(9)
关键词：火山岩 ; volcanic rocks ; 氩—氩计时 ; Ar-Ar dating ; 羌塘盆地 ; Qiangtang Basin
页码：p.1221-1228
图表：6 illus., 2 tables, 34 refs.
分类号：0801
issnNo：ISSN1671-2552
isbnNo：CN11-4648/P

摘要

///Cenozoic volcanic rocks are discovered in northern Gemucuo area during 1∶250 000 Mayigangri regional geological investigation. ⁴⁰Ar/³⁹Ar dating are carried on three samples from this volcanic rocks and yield the plateau ages of (30.6±0.4) Ma, (30.0±0.2) Ma and (29.8 ±0.3) Ma, which represent the volcanic eruption age. The geochemical characteristics of the volcanic rocks in the northern Gemucuo are similar with potassic volcanic rocks, together with the Cenozoic volcanic rocks distributing at Yulinshan, Zougouyouchacuo, duogecuoren etc. constitute, the Cenozoic potassic-ultrapotassic volcanic belt in Qiangtang area. The formation of these volcanic rocks has relations with the collision between India and Asia and uplift of Qinghai-Tibetan Plateau.

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