Dating and Petrogenesis of Late Permian-Early Triassic Peraluminous Granites in the Siziwangqi Area, <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on">Inner Mongolia</st1:place><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Dating and Petrogenesis of Late Permian-Early Triassic Peraluminous Granites in the Siziwangqi Area, Inner Mongolia

详细信息

责任者：Liu Changfeng (School of Earth Science and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Yang Shuaishi
刊名：Acta Geologica Sinica
出版年：2010
卷期：84(7)
关键词：花岗岩 ; granite ; 过铝质成分 ; peraluminous composition ; 内蒙古 ; Inner Mongolia
页码：p.1002-1016
图表：6 illus., 2 tables, 83 refs.
分类号：0801
issnNo：ISSN0001-5717
isbnNo：CN11-1951/P

摘要

SA" lang=EN-US>Study area is located in the central Segment of the northern margin of the North China Craton and adjacent to the Xing-Meng orogenic belt. LA-ICP-MS U-Pb dating and petrochemical analysis of three zircon samples from the Amawusu granodiorite yielded U-Pb ages of 267±9 Ma (MSWD=9.7). The Bulong monzogranite and the Geertu muscovite granite formed at (239±4) Ma and (238±6) Ma (MSWD =0.91), respectively. The characters indicates that the Geertu muscovite granites are not typical S-type granites, belong to post-orogenic setting, represented the ending of orogeny. Both the Geertu muscovite granite and muscovite monzogranite vein had suffered intense effect by hydrothermal fluids.