Crustal Structures beneath the Mid-Lower Yangtze Metallogenic Belt and Its Adjacent Regions in Eastern China-Evidences from P-Wave Receiver Function Imaging for a MASH Metallization Process?

详细信息   

• 责任者：Shi Danian (Institute of Mineral Resources ; CAGS ; Beijing 100037 ; China) ; Lü Qingtian
• 刊名：Acta Geologica Sinica
• 出版年：2012
• 卷期：86(3)
• 关键词：地壳结构 ; crustal structure ; 成矿作用 ; metallogenesis ; 纵波 ; P-waves ; 接收函数 ; receiver functions ; 长江中下游成矿带 ; Metallogenic Belt of Middle and Lower Reaches of Yangtze River
• 页码：p.389-399
• 图表：4 illus., 1 table, 51 refs.
• 分类号：1001
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

摘要

 
    

Using the passive-source seismic data collected during November 2009 to March 2011 from a multidisciplinary transect in the mid-lower Yangtze metallogenic belt, the authors perfomed studies of receiver function imaging and others, and achieved seismic images of the crust and upper mantle structures in the study region with great clearance. Based on the images obtained from the receiver function studies, the authors suggest that the lower crust of the Yangtze metallogenic belt to be one site of the multilevel metallogenic magma system, and the formation of the metallogenic belt to be a result of MASH process. Then adakitic-like magma rised up along the extensional and the decollemental structures in the shallow crust as intrusive bodies, and reacted with country rocks to form mineral deposits.