中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
Paleocene (c. 62 Ma) Leucogranites in Southern Lhasa, Tibet: Products of Syn-collisional Crustal Anatexis during Slab Roll-back?

文献类型：期刊论文

作者Ma, Lin1,2; Wang, Qiang1,3,4; Kerr, Andrew C.2; Yang, Jin-Hui5; Xia, Xiao-Ping1; Ou, Quan1; Yang, Zong-Yong1,4; Sun, Peng1,4
刊名JOURNAL OF PETROLOGY
出版日期2017-11-01
卷号58期号:11页码:2089-2114
关键词early Paleocene leucogranite crustal anatexis Tibet Indo-Asian collision
ISSN号0022-3530
DOI10.1093/petrology/egy001
文献子类Article
英文摘要Voluminous peraluminous leucogranites are common in large-scale orogenic belts and are crucial in gaining a fuller understanding of the related geodynamic process. However, the origin of such syn-collisional leucogranites remains highly controversial. In this contribution, we report petrological and geochemical data for Paleocene (c. 63 Ma) garnet-bearing, two-mica granites and associated biotite granites from the Gangdese batholith in southern Tibet. The Zhengga biotite granites have high SiO2 (70-73 wt %) and low MgO (0 center dot 4-0 center dot 7 wt %) contents with initial Sr-87/Sr-86 ratios of 0 center dot 7049-0 center dot 7050, epsilon(Nd)(t) values of +0 center dot 5 to +1 center dot 2 and zircon delta O-18 values of 5 center dot 6-6 center dot 9aEuro degrees, similar to most early Paleocene granitoids in southern Lhasa. These geochemical characteristics suggest that the Zhengga biotite granites were derived from a crustal source that mixed with variable amounts of Gangdese juvenile lower crust and minor ancient crust-derived melts. The Zhengga peraluminous, garnet-bearing, two-mica granites have similar Sr-Nd-O isotope compositions to the biotite granites (0 center dot 7037-0 center dot 7050, +0 center dot 4 to +0 center dot 8, 5 center dot 5-7 center dot 3aEuro degrees, respectively) as well as higher SiO2 (73-76 wt %) and lower TiO2 (< 0 center dot 06 wt %), MgO (< 0 center dot 3 wt %), Fe2O3T (< 2 wt %) and CaO (< 0 center dot 7 wt %) contents. These most probably represent highly evolved biotite granite magmas that differentiated in the mid-crust. The first contact of India with Asia appears to have occurred in central Lhasa during the early Paleocene (65-63 Ma) and led to crustal thickening and cessation of magmatism. Early Paleocene slab roll-back would have significantly enhanced asthenospheric corner flow and supplied a long-lived heat source for coeval crustal anatexis and metamorphism in southern Lhasa during the early phase of continental collision. Similar interaction between continental collision and oceanic subduction may also occur in other large-scale convergence zones in which the lithosphere and crust are anomalously hot.
WOS关键词INDIA-ASIA COLLISION ; ZIRCON U-PB ; HF ISOTOPIC CONSTRAINTS ; CONTINENTAL COLLISION ; TECTONIC EVOLUTION ; WESTERN HIMALAYA ; IGNEOUS ROCKS ; GANGDESE BATHOLITH ; METAMORPHIC ZIRCON ; TETHYAN HIMALAYA
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000429465900001
出版者OXFORD UNIV PRESS
资助机构DREAM Programs of China(2016YFC0600407 ; DREAM Programs of China(2016YFC0600407 ; National Natural Science Foundation of China(41402048 ; National Natural Science Foundation of China(41402048 ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; talent project of Guangdong Province(2014TX01Z079) ; talent project of Guangdong Province(2014TX01Z079) ; State Scholarship Fund of China(201604910124) ; State Scholarship Fund of China(201604910124) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; 2016YFC0600309) ; 2016YFC0600309) ; 41630208) ; 41630208) ; DREAM Programs of China(2016YFC0600407 ; DREAM Programs of China(2016YFC0600407 ; National Natural Science Foundation of China(41402048 ; National Natural Science Foundation of China(41402048 ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; talent project of Guangdong Province(2014TX01Z079) ; talent project of Guangdong Province(2014TX01Z079) ; State Scholarship Fund of China(201604910124) ; State Scholarship Fund of China(201604910124) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; 2016YFC0600309) ; 2016YFC0600309) ; 41630208) ; 41630208) ; DREAM Programs of China(2016YFC0600407 ; DREAM Programs of China(2016YFC0600407 ; National Natural Science Foundation of China(41402048 ; National Natural Science Foundation of China(41402048 ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; talent project of Guangdong Province(2014TX01Z079) ; talent project of Guangdong Province(2014TX01Z079) ; State Scholarship Fund of China(201604910124) ; State Scholarship Fund of China(201604910124) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; 2016YFC0600309) ; 2016YFC0600309) ; 41630208) ; 41630208) ; DREAM Programs of China(2016YFC0600407 ; DREAM Programs of China(2016YFC0600407 ; National Natural Science Foundation of China(41402048 ; National Natural Science Foundation of China(41402048 ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC026) ; talent project of Guangdong Province(2014TX01Z079) ; talent project of Guangdong Province(2014TX01Z079) ; State Scholarship Fund of China(201604910124) ; State Scholarship Fund of China(201604910124) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences(135TP201601) ; 2016YFC0600309) ; 2016YFC0600309) ; 41630208) ; 41630208)
源URL[http://ir.iggcas.ac.cn/handle/132A11/83180]  
专题中国科学院地质与地球物理研究所
通讯作者Ma, Lin; Wang, Qiang
作者单位1.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff CF10 3AT, S Glam, Wales
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Ma, Lin,Wang, Qiang,Kerr, Andrew C.,et al. Paleocene (c. 62 Ma) Leucogranites in Southern Lhasa, Tibet: Products of Syn-collisional Crustal Anatexis during Slab Roll-back?[J]. JOURNAL OF PETROLOGY,2017,58(11):2089-2114.
APA Ma, Lin.,Wang, Qiang.,Kerr, Andrew C..,Yang, Jin-Hui.,Xia, Xiao-Ping.,...&Sun, Peng.(2017).Paleocene (c. 62 Ma) Leucogranites in Southern Lhasa, Tibet: Products of Syn-collisional Crustal Anatexis during Slab Roll-back?.JOURNAL OF PETROLOGY,58(11),2089-2114.
MLA Ma, Lin,et al."Paleocene (c. 62 Ma) Leucogranites in Southern Lhasa, Tibet: Products of Syn-collisional Crustal Anatexis during Slab Roll-back?".JOURNAL OF PETROLOGY 58.11(2017):2089-2114.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。