IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Late Triassic ridge subduction of Paleotethys: Insights from high-Mg granitoids in the Songpan-Ganzi area of northern Tibet
Liu, Yin1,2; Xiao, Wenjiao1,2,3; Windley, Brian F.4; Li, Rongshe5; Ji, Wenhua5; Zhou, Kefa1; Sang, Miao1; Chen, Yichao1,2; Jia, Xiaoliang1; Li, Liang1,2; Zhang, Haidi5
2019-06-01
Source PublicationLITHOS
ISSN0024-4937
Volume334Pages:254-272
AbstractThe time of final closure of the Paleotethys Ocean is still hotly debated in particular regarding the Jinsha Ocean in northern Tibet. This study reports new geochronologic, geochemical and zircon Hf isotopic data of six granodiorites-diorites, which intrude the Mid-Late Triassic Songpan-Ganzi complex (SGC). LA-ICP-MS zircon U-Pb analyses of three quartz diorites (214.9 +/- 2.2, 211.0 +/- 1.3, 205.8 +/- 1.4 Ma) and three granodiorites (210.8 +/- 2.7, 206.7 +/- 3.3, 205.9 +/- 3.5 Ma) gave a Late Triassic age range (214.9-205.8 Ma). These granodiorite-diorite rocks have relatively high MgO (up to 9.1%) and Mg-# (up to 70.2), Al2O3, Cr, Ni, but low TiO2, and high magnesium andesite/diorite (HMA) chemical signatures with low Sr and Y content, and slight-moderate negative Eu anomaly. Also, the dioritic enclaves and Late Triassic detrital zircons (as young as 208 Ma) were captured by studied rocks. Hf isotope data show overall slight to moderate negative zircon epsilon Hf(t) values (-1.97 to -5.76, -4.12 to -6.72) and heterogeneous T-DM(C) ages (1.38-1.61Ga, 1.51-1.68Ga) for quartz diorites and granodiorites respectively, together with other published Hf isotopic data in SGC, are in highly concert with those around similar to 240 and similar to 440Ma magmas (as potential sources for SGC turbidites) in east Kunlun orogenic belt. Taken together, the HMA magmas were probably derived from a reaction between subducted marine sedimentary siliceous melts and peridotites from a mantle wedge. The linear distribution of Late Triassic HMAs and their eastward-younging trend (from northern Qiangtang to southern SGC), in combination with the contrasting distribution of volcanic rocks in the northern Qiangtang terrane, lead us to suggest that a slab window opened in the downgoing oceanic crust with two diverse slab angles during oblique subduction. Accordingly, the final closure of the Paleotethys Ocean was later than 205 Ma, and most likely in the end of the Late Triassic to Early Jurassic. (C) 2019 Elsevier B.V. All rights reserved.
KeywordHigh-Mg andesite/diorite Slab window Ridge subduction Songpan-Ganzi Jinsha Ocean Qiangtang Tibet
DOI10.1016/j.lithos.2019.03.012
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS
WOS KeywordGARZE FOLD BELT ; SETOUCHI VOLCANIC BELT ; A-TYPE GRANITES ; PB ZIRCON AGES ; ADAKITIC MAGMATISM ASSOCIATION ; HIGH-MAGNESIAN ANDESITES ; WESTERN KUNLUN RANGE ; ASIAN OROGENIC BELT ; SLAB-DERIVED MELTS ; U-PB
Language英语
Funding ProjectNational Natural Science Foundation of China[41888101] ; National Key R&D Program of China[2017YFC0601206] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS)[XDB18020203] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-SYS012]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000468720900017
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92100
Collection岩石圈演化国家重点实验室
Corresponding AuthorXiao, Wenjiao
Affiliation1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Sch Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
5.Xian Inst Geol & Mineral Resources, Xian 710054, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Liu, Yin,Xiao, Wenjiao,Windley, Brian F.,et al. Late Triassic ridge subduction of Paleotethys: Insights from high-Mg granitoids in the Songpan-Ganzi area of northern Tibet[J]. LITHOS,2019,334:254-272.
APA Liu, Yin.,Xiao, Wenjiao.,Windley, Brian F..,Li, Rongshe.,Ji, Wenhua.,...&Zhang, Haidi.(2019).Late Triassic ridge subduction of Paleotethys: Insights from high-Mg granitoids in the Songpan-Ganzi area of northern Tibet.LITHOS,334,254-272.
MLA Liu, Yin,et al."Late Triassic ridge subduction of Paleotethys: Insights from high-Mg granitoids in the Songpan-Ganzi area of northern Tibet".LITHOS 334(2019):254-272.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Yin]'s Articles
[Xiao, Wenjiao]'s Articles
[Windley, Brian F.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Yin]'s Articles
[Xiao, Wenjiao]'s Articles
[Windley, Brian F.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Yin]'s Articles
[Xiao, Wenjiao]'s Articles
[Windley, Brian F.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

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