A slab break-off model for the submarine volcanic-hosted iron mineralization in the Chinese Western Tianshan: Insights from Paleozoic subduction-related to post-collisional magmatism

doi:10.1016/j.oregeorev.2017.11.015

	A slab break-off model for the submarine volcanic-hosted iron mineralization in the Chinese Western Tianshan: Insights from Paleozoic subduction-related to post-collisional magmatism
	Wang, Xin-Shui 1; Zhang, Xi 2; Gao, Jun 1,3; Li, Ji-Lei 1,6; Jiang, Tuo 4; Xue, Sheng-Chao 5
刊名	ORE GEOLOGY REVIEWS
	2018
卷号	92 页码:144-160
关键词	Volcanic-hosted iron deposits Tectonic setting Western Tianshan Slab break-off Central Asian Orogenic Belt
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2017.11.015
文献子类	Article
英文摘要	The distinct submarine volcanic-hosted iron ore deposits in the Awulale Iron Metallogenic Belt are the most important sources for iron in the Chinese Western Tianshan metallogenetic province, although, the exact tectonic setting for their formation remains poorly constrained. A compilation of published and new geochronological and geochemical data suggests a protracted magmatism from ca. 450 to 290 Ma was in close spatial and temporal proximity to the iron deposits. The different magmatic rocks have broadly similar arc-like geochemical signatures such as LREE and LILE enrichments, HREE and HFSE depletions, Nb-Ta-Ti negative anomalies and flat HREE patterns, all of which are attributed to magmatic differentiation and/or partial melting in relatively thin crust due to long-term extension. The contrasting whole-rock Nd isotopic patterns of the igneous rocks and the well-defined peak metamorphism (ca. 320-310 Ma) of the subduction-zone high-pressure rocks indicate that ca. 450-321 Ma magmatic rocks with an increasingly positive epsilon(Nd)(t) shift were formed during the northward subduction of the South Tianshan Ocean, where slab rollback resulted in an extensional setting in the southern Yili-Central Tianshan Block. In contrast, the synchronicity of the ca. 320-310 Ma subduction-zone peak metamorphism and magmatic flare-up with uniformly positive epsilon Nd-Nd(t) values is interpreted as the consequence of slab break-off subsequent to the oceanic subduction and the continental collision. By inference, the late-stage (ca. 309-290 Ma) magmatism was likely constructed in a post-collisional setting. The submarine volcanic-hosted iron mineralization exclusively occurred coeval with the peak metamorphism and intensive magmatism, probably suggesting slab break-off as the exact tectonic setting for iron mineralization. Consequently, the western extension of the Awulale Iron Metallogenic Belt occurring roughly parallel to the South Tianshan Orogen may have significant potential for prospecting the submarine volcanic-hosted iron ore deposits.
WOS关键词	ASIAN OROGENIC BELT ; U-PB GEOCHRONOLOGY ; NW-CHINA ; TECTONIC EVOLUTION ; CALC-ALKALINE ; HIGH-PRESSURE ; YILI BLOCK ; GEOCHEMICAL CLASSIFICATION ; METAMORPHIC EVOLUTION ; SOUTHWESTERN ALTAIDS
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000424185700011
资助机构	National Key R&D Program of China(2017YFC0601206) ; National Key R&D Program of China(2017YFC0601206) ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; China Postdoctoral Science Foundation(2016M600127) ; China Postdoctoral Science Foundation(2016M600127) ; CSC-DAAD ; CSC-DAAD ; 41025008) ; 41025008) ; National Key R&D Program of China(2017YFC0601206) ; National Key R&D Program of China(2017YFC0601206) ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; China Postdoctoral Science Foundation(2016M600127) ; China Postdoctoral Science Foundation(2016M600127) ; CSC-DAAD ; CSC-DAAD ; 41025008) ; 41025008) ; National Key R&D Program of China(2017YFC0601206) ; National Key R&D Program of China(2017YFC0601206) ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; China Postdoctoral Science Foundation(2016M600127) ; China Postdoctoral Science Foundation(2016M600127) ; CSC-DAAD ; CSC-DAAD ; 41025008) ; 41025008) ; National Key R&D Program of China(2017YFC0601206) ; National Key R&D Program of China(2017YFC0601206) ; National Natural Science Foundation of China(41390445 ; National Natural Science Foundation of China(41390445 ; China Postdoctoral Science Foundation(2016M600127) ; China Postdoctoral Science Foundation(2016M600127) ; CSC-DAAD ; CSC-DAAD ; 41025008) ; 41025008)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82738]
专题	中国科学院地质与地球物理研究所
通讯作者	Gao, Jun
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, POB 9825, Beijing 100029, Peoples R China 2.China Minmet Corp, Beijing 100010, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.Wuhan Ctr China Geol Survey, Lab Isotope Geochem, Wuhan 430205, Hubei, Peoples R China 5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 6.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xin-Shui,Zhang, Xi,Gao, Jun,et al. A slab break-off model for the submarine volcanic-hosted iron mineralization in the Chinese Western Tianshan: Insights from Paleozoic subduction-related to post-collisional magmatism[J]. ORE GEOLOGY REVIEWS,2018,92:144-160.
APA	Wang, Xin-Shui,Zhang, Xi,Gao, Jun,Li, Ji-Lei,Jiang, Tuo,&Xue, Sheng-Chao.(2018).A slab break-off model for the submarine volcanic-hosted iron mineralization in the Chinese Western Tianshan: Insights from Paleozoic subduction-related to post-collisional magmatism.ORE GEOLOGY REVIEWS,92,144-160.
MLA	Wang, Xin-Shui,et al."A slab break-off model for the submarine volcanic-hosted iron mineralization in the Chinese Western Tianshan: Insights from Paleozoic subduction-related to post-collisional magmatism".ORE GEOLOGY REVIEWS 92(2018):144-160.