Geochronology and Geochemistry of Granite Pluton in the North of Qiaowan, space prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:City w:st="on">Beishan Mountainst1:City>, <st1:State w:st="on">Gansust1:State> Province, <st1:country-region w:st="on"><st1:place w:st="on">Chinast1:place>st1:country-region>, and Its Geological Significance

详细信息   

• 责任者：Feng Jicheng (Key Laboratory of Orogenic Belts and Crustal Evolution ; MOE ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Zhang Wen
• 刊名：Acta Scientiarum Naturalium Universitatis Pekinensis
• 出版年：2012
• 卷期：48(1)
• 关键词：花岗岩 ; granite ; 甘肃 ; Gansu Province
• 页码：p.61-70
• 图表：8 illus., 4 tables, 51 refs.
• 分类号：0801
• issnNo：ISSN0479-8023
• isbnNo：CN11-2442/N

摘要

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style="MARGIN: 0cm 0cm 0pt" class=MsoNormal>To deepen the understanding on tectonic evolution of Beishan Moutain, granite pluton which lies in the north of Qiaowan, northern margin of Dunhuang block (south belt of space prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:PlaceName w:st="on">Beishanst1:PlaceName> <st1:PlaceType w:st="on">Mountainst1:PlaceType>), <st1:place w:st="on"><st1:PlaceName w:st="on">Gansust1:PlaceName> <st1:PlaceType w:st="on">Provincest1:PlaceType>st1:place>, is studied in geochronology and geochemistry. From the εH_f(t), εN_d(t) values and geochemical characteristics, it can be concluded that the pluton is a mixture of crustal and mantle derived magma. Based on regional geology and the geochemical characteristics, the hornblende granite pluton in the north of Qiaowan was formed during post-collision period, which suggests the collision of <st1:place w:st="on"><st1:PlaceName w:st="on">Beishanst1:PlaceName> <st1:PlaceType w:st="on">Mountainst1:PlaceType>st1:place> is already finished in Late Carboniferous.