IGGCAS OpenIR  > 矿产资源研究院重点实验室
Contrasting migmatites in the southern Chinese Central Tianshan: Petrogenesis and geological implications
Wang XinShui1,2; Jiang Tuo3; Gao Jun1; Gao Qiang4; Li JiLei1; Zhang Xi5
2019
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume35Issue:10Pages:3233-3261
AbstractThe Central Tianshan Block is a major constituent of the Paleozoic Western Tianshan Orogen in the southwestern Central Asian Orogenic Belt, and its geological evolution and tectonic affinity is essential to reconstruction of the architectural framework and subduction-accretion processes of the Western Tianshan Orogen. The ubiquitous migmatites in high-grade metamorphic terranes provide an excellent window to the tectonic evolution and affinity of the crustal basement of the Central Tianshan Block. Here we present zircon U-Pb-Hf isotopic and whole -rock geochemical data for two contrasting migmatites from the Wuwamen complex in the southern Central Tianshan Block. The first type of stromatic migmatite with an intermediate-mafic greywacke protolith underwent migmatization at ca. 1. 8Ga, resulted from metamorphic differentiation associated with the coeval amphibolite facies metamorphic event. The paleosomes of the second type of stromatic migmatite are composed of interlayered orthogneisses with protolith formation ages at ca. 2. 5Ga and an amphibolite facies metamorphic overprint at ca. 1. 8Ga. Geochemical data reveal that they were derived from partial melting of subducted oceanic crust or lithospheric mantle in an oceanic subduction setting. The meta-mafic dykes intruding the orthogneisses were formed at ca. 1. 72Ga and display geochemical affinity to Fe -Ti basalts, which are interpreted to be derived from partial melting of the asthenospheric mantle in a post-collisional setting. The leucosomes crosscut the orthogneisses and meta-mafic dykes with a sharp contact relationship, suggesting that migmatization was resulted from injection of external partial melts probably induced by anataxis during orogenic collapse. The 2. 5Ga magmatism, 1. 8Ga metamorphism and 790 Ma migmatization recorded by the Wuwamen complex are comparable to those events in the northern Tarim Craton, and thus we conclude that the Central Tianshan Block is a microcontinent with a Neoarchean-Paleoproterozoic basement and has a close affinity with the Tarim Craton.
KeywordMigmatite Central Tianshan Block Tianshan Orogen Central Asian Orogenic Belt
DOI10.18654/1000-0569/2019.10.16
WOS KeywordPALEOZOIC TECTONIC EVOLUTION ; ASIAN OROGENIC BELT ; SUBDUCTION-ACCRETION PROCESSES ; NORTHERN TARIM CRATON ; HF-ISOTOPE EVIDENCE ; U-PB GEOCHRONOLOGY ; LU-HF ; CRUSTAL EVOLUTION ; NW CHINA ; METAMORPHIC COMPLEX
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000491168800016
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93877
Collection矿产资源研究院重点实验室
Corresponding AuthorWang XinShui
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral, Wuhan 430074, Hubei, Peoples R China
3.Wuhan Ctr China Geol Survey, Lab Isotope Geochem, Wuhan 430205, Hubei, Peoples R China
4.China Inst Geoenvironm Monitoring, Beijing 100081, Peoples R China
5.China Minmetals Corp, Beijing 100010, Peoples R China
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang XinShui,Jiang Tuo,Gao Jun,et al. Contrasting migmatites in the southern Chinese Central Tianshan: Petrogenesis and geological implications[J]. ACTA PETROLOGICA SINICA,2019,35(10):3233-3261.
APA Wang XinShui,Jiang Tuo,Gao Jun,Gao Qiang,Li JiLei,&Zhang Xi.(2019).Contrasting migmatites in the southern Chinese Central Tianshan: Petrogenesis and geological implications.ACTA PETROLOGICA SINICA,35(10),3233-3261.
MLA Wang XinShui,et al."Contrasting migmatites in the southern Chinese Central Tianshan: Petrogenesis and geological implications".ACTA PETROLOGICA SINICA 35.10(2019):3233-3261.
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
[Wang XinShui]'s Articles
[Jiang Tuo]'s Articles
[Gao Jun]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang XinShui]'s Articles
[Jiang Tuo]'s Articles
[Gao Jun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang XinShui]'s Articles
[Jiang Tuo]'s Articles
[Gao Jun]'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.