中国科学院青藏高原研究所机构知识库
Advanced  
ITPCAS OpenIR  > 图书馆  > 期刊论文
学科主题: 地球科学::地质学
题名: Tectono-magmatic evolution of Late Jurassic to Early Cretaceous granitoids in the west central Lhasa subterrane, Tibet
作者: Cao, MJ (Cao, MingJian)1, 2; Qin, KZ (Qin, KeZhang)1, 5; Li, GM (Li, GuangMing)1, 5; Li, JX (Li, JinXiang)3, 5; Zhao, JX (Zhao, JunXing)1; Evans, NJ (Evans, Noreen J.)4; Hollings, P (Hollings, Pete)2
通讯作者: Qin, KZ
关键词: U-PB GEOCHRONOLOGY ; HF ISOTOPIC CONSTRAINTS ; PORPHYRY COPPER-DEPOSIT ; TERTIARY IGNEOUS ROCKS ; A-TYPE GRANITES ; SOUTHERN TIBET ; VOLCANIC-ROCKS ; LU-HF ; FLAT SUBDUCTION ; TRACE-ELEMENT
刊名: GONDWANA RESEARCH
发表日期: 2016
DOI: 10.1016/j.gr.2016.01.006
卷: 39, 期:0, 页:386-400
收录类别: SCI
合作性质: 国际
文章类型: Article
部门归属: 碰撞与隆升
英文摘要: There is ongoing debate as to the subduction direction of the Bangong-Nujiang Ocean during the Mesozoic (northward, southward or bidirectional subduction). Arc-related intermediate to felsic intrusions could mark the location of the subduction zone and, more importantly, elucidate the dominant geodynamic processes. We report whole rock geochemical and zircon U-Pb and Hf isotopic data for granitoids from the west central Lhasa subterrane (E80 degrees to E86 degrees). All rocks show metaluminous to peraluminous, calc-alkaline signatures, with strong depletion of Nb, Ta and Ti, enrichment of large ion lithophile elements (e.g., Cs, Rb, K), a negative correlation between SiO2 and P2O5, and a positive correlation between Rb and Th. All these features are indicative of I-type arc magmatism. New zircon U-Pb results, together with data from the literature, indicate continuous magmatism from the Late Jurassic to the Early Cretaceous (160 to 130 Ma). Zircon U-Pb ages for samples from the northern part of the west central Lhasa subterrane (E80 degrees to E82 degrees 30') yielded formation ages of 165 to 150 Ma, whereas ages of 142 to 130 Ma were obtained on samples from the south. This suggests flat or low-angle subduction of the Bangong-Nujiang Ocean, consistent with a slight southward decrease in zircon epsilon Hf(t) values for Late Jurassic rocks. Considering the crustal shortening, the distance from the Bangong-Nujiang suture zone, and a typical subduction zone melting depth of similar to 100 km, the subduction angle was less than 14 degrees for Late Jurassic magmatism in the central Lhasa interior, consistent with flat or low-angle subduction. Compared with Late Jurassic rocks (main eHf(t) values of -16 to -7), Early Cretaceous rocks (145 to 130 Ma) show markedly higher eHf(t) values (mainly-8 to 0), possibly indicating slab roll-back, likely caused by slab foundering or break-off. Combined with previously published works on arc magmatism in the central Lhasa and west part of the southern Qiangtang subterranes, our results support the bidirectional subduction of the Bangong-Nujiang Ocean along the Bangong-Nujiang Suture Zone, and indicates flat or low-angle southward subduction (165 to 145Ma) followed by slab roll-back (145 to 130 Ma). (C) 2016 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000397872900022
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7500
Appears in Collections:图书馆_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
V.39 386-400 2016.pdf(4478KB)期刊论文作者接受稿开放获取View 联系获取全文

作者单位: 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, POB 9825, Beijing 100029, Peoples R China
2.Lakehead Univ, Dept Geol, 955 Oliver Rd, Thunder Bay P7B 5E1, ON, Canada
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China
4.Curtin Univ, TIGeR, John Laeter Ctr, Dept Appl Geol, Perth, WA 6945, Australia
5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China

Recommended Citation:
Cao, MJ ,Qin, KZ ,Li, GM ,et al. Tectono-magmatic evolution of Late Jurassic to Early Cretaceous granitoids in the west central Lhasa subterrane, Tibet[J]. GONDWANA RESEARCH,2016,39(0):386-400.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Cao, MJ (Cao, MingJian)]'s Articles
[Qin, KZ (Qin, KeZhang)]'s Articles
[Li, GM (Li, GuangMing)]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Cao, MJ (Cao, MingJian)]‘s Articles
[Qin, KZ (Qin, KeZhang)]‘s Articles
[Li, GM (Li, GuangMing)]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: V.39 386-400 2016.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院青藏高原研究所 - Feedback
Powered by CSpace