• 责任者：Liu Bin (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Ma Changqian
• 刊名：Earth Science
• 出版年：2013
• 卷期：38(5)
• 关键词：A型花岗岩 ; A-type granite ; 昆仑山 ; Kunlun Mountains
• 页码：p.947-962
• 图表：9 illus., 2 tables, 63 refs.
• 分类号：0801
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

     Middle Devonian Binggou granites from the eastern Kunlun orogen,are characterized by relatively high silicon（SiO2 =71.85%-72.77%）,total alkali（K2 O＋Na2 O=8.39-8.58）,aluminum（A/CNK=0.93-1.03）,FeOt /MgO（6.247.86）and 104 Ga/Al values（3.04-3.60）,high LREE,obvious negative Eu anomalies,and notable enrichment of HFSE（Zr,Ga,Y,Hf,etc.）,strong depletion of Ba,Sr,P and Ti relative to the primitive mantle,similar to the geochemical features of A-type granites.The LA-ICP-MS Zircon U-Pb analyses yield a weighted mean 206Pb/238 U age of 391±3Ma（MSWD=2.36）,considered to be the formation age of the Binggou granites.With a comprehensive consideration on many different indexes,such as whole rock Sr-Nd isotopes,geochemistry,experimental petrology and so on,we conclude that the Binggou granites formed by partial melting of crust materials（meta-greywacke）on the conditions of low pressure and high temperature at the stage of postorogenic stretch.The Binggou granites are younger than the other Paleozoic A-type granites reported in the eastern Kunlun orogen,suggesting the ending proto-tethys and the beginning paleo-tethys.