干旱区生态环境知识资源中心(Arid): Imaging the Late Triassic lithospheric architecture of the Yidun Terrane, eastern Tibetan Plateau: Observations and interpretations

Arid

DOI	10.1130/B35778.1
	Imaging the Late Triassic lithospheric architecture of the Yidun Terrane, eastern Tibetan Plateau: Observations and interpretations
	Zhan, Qiong-Yao; Zhu, Di-Cheng; Wang, Qing; Cawood, Peter A.; Xie, Jin-Cheng; Liu, Xiang; Li, Shi-Min; Zhang, Liang-Liang; Zhao, Zhi-Dan
通讯作者	Zhu, DC (corresponding author), China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China. ; Zhu, DC (corresponding author), China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China.
来源期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN	0016-7606
EISSN	1943-2674
出版年	2021
卷号	133 期号:11-12 页码:2279-2290
英文摘要	The present-day lithospheric architecture of modern and ancient orogens can be imaged by geophysical techniques. For ancient orogens, unravelling their architecture at the time of formation is hindered by later tectono-magmatic events. In this paper, we use spatial variations in radiogenic isotopic compositions of Late Triassic magmatism from the Yidun Terrane, eastern Tibetan Plateau, to establish its lithospheric architecture during the Triassic. Comprehensive geochemical and isotopic data of Late Triassic magmatic rocks from four transects across the Yidun Terrane document eastward enrichment in whole-rock Nd, Sr, and zircon Hf isotopic compositions. Mafic and felsic rocks of major plutons show coherent and nonlinear trends in the Zr and P2O5 systematics and have limited variation of isotopic compositions. This indicates that Late Triassic magmatic differentiation was dominated by fractionation of mantle-derived mafic magmas. The spatial isotopic trends result from changing mantle sources, including variable contributions of isotopically depleted asthenospheric mantle and isotopically enriched subcontinental lithospheric mantle (SCLM) to magma sources. The spatial variation of mantle sources suggests a westward thinning of the SCLM during the Triassic. We propose that this architecture is most likely associated with eastward subduction of oceanic lithosphere of the Jinshajiang Ocean located at the west of the Yidun Terrane, immediately prior to the Late Triassic magmatism.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000715043400003
WOS关键词	XIANGCHENG-DERONG AREA ; TECTONIC EVOLUTION ; VOLCANIC-ROCKS ; CRUSTAL STRUCTURE ; SW CHINA ; CHEMICAL CLASSIFICATION ; ZIRCON GEOCHRONOLOGY ; MOJAVE DESERT ; HF ISOTOPES ; ARC
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368047
作者单位	[Zhan, Qiong-Yao; Zhu, Di-Cheng; Wang, Qing; Xie, Jin-Cheng; Liu, Xiang; Li, Shi-Min; Zhang, Liang-Liang; Zhao, Zhi-Dan] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China; [Zhan, Qiong-Yao; Zhu, Di-Cheng; Wang, Qing; Xie, Jin-Cheng; Liu, Xiang; Li, Shi-Min; Zhang, Liang-Liang; Zhao, Zhi-Dan] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China; [Cawood, Peter A.] Monash Univ, Sch Earth Atmosphere & Environm, Melbourne, Vic 3800, Australia
推荐引用方式 GB/T 7714	Zhan, Qiong-Yao,Zhu, Di-Cheng,Wang, Qing,et al. Imaging the Late Triassic lithospheric architecture of the Yidun Terrane, eastern Tibetan Plateau: Observations and interpretations[J],2021,133(11-12):2279-2290.
APA	Zhan, Qiong-Yao.,Zhu, Di-Cheng.,Wang, Qing.,Cawood, Peter A..,Xie, Jin-Cheng.,...&Zhao, Zhi-Dan.(2021).Imaging the Late Triassic lithospheric architecture of the Yidun Terrane, eastern Tibetan Plateau: Observations and interpretations.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,133(11-12),2279-2290.
MLA	Zhan, Qiong-Yao,et al."Imaging the Late Triassic lithospheric architecture of the Yidun Terrane, eastern Tibetan Plateau: Observations and interpretations".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 133.11-12(2021):2279-2290.