Paleogene Large-Scale Volcanism and Prospecting Implication in the East Sag-Uplift of Nyanqentanglha Arc-Back in soft-com:office:smarttags" />Tibet, China

详细信息   

• 责任者：Lei Chuanyang (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Wang Xiongwu
• 刊名：Journal of Chengdu University of Technology
• 出版年：2011
• 卷期：38(5)
• 关键词：火山岩 ; volcanic rocks ; 地球化学 ; geochemistry
• 页码：p.571-580
• 图表：illus., 33 refs.
• 分类号：0600
• 出版序号：1614
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

摘要

 
    

///The east sag-uplift of the Nyanqentanglha arc-back is demarcated by the Naqu-Dangxiong fault on the west, the Shiquanhe-Namucuo-Jiali suture zone on the north and the east, and the Shamole-Maila-Milashan-Luobadui fault on the south. The geochemical data of the Pana group volcanic rocks indicate that they are high K calc-alkali — shoshonitic volcanic rock series. This group of volcanic rocks is formed in the transition zone of soft collision to hard collision. They are the mixed products of the basic differential magma derived from the mantle and the acid magma derived from the remelting continental crust. The abyssal sediments on the subducting slab participated in this process. Therefore, it is quite favorable to find metal sulfide deposits related to the acidic volcanic rocks because the rhyolites occur in the area.soft-com:office:office" />