Qingyuan high-grade granite-greenstone terrain in the Eastern North China Craton: Root of a Neoarchaean arc

doi:10.1016/j.tecto.2015.04.013

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Qingyuan high-grade granite-greenstone terrain in the Eastern North China Craton: Root of a Neoarchaean arc
	Peng, Peng 1; Wang, Chong ; Wang, Xinping ; Yang, Shuyan
刊名	TECTONOPHYSICS
	2015-11-01
卷号	662 页码:7-21
关键词	The Eastern North China Craton Granite-greenstone Terrain Neoarchaean Ttg Archaean-style Subduction Arc
DOI	10.1016/j.tecto.2015.04.013
文献子类	Article
英文摘要	The Qingyuan high-grade granite-greenstone terrain is one of the first recognized granite-greenstone terrains in the Eastern North China Craton. Similar to other Archaean terrains, its tectonic environment is debated: was it an intra-continental rift or a modem analogy of arc? Occurrence and petrogenesis of major igneous series, the ultramafic-mafic and felsic volcanic rocks (>2510 Ma) and the plutons of the quartz diorite (2570-2510 Ma), TTG (2570-2510 Ma) and quartz monzodiorite (2510-2490 Ma) series in Xinbin area are investigated. The mafic intrusives and volcanic rocks have high MgO content (5.4-7.5 wt.%) and Mg-number (48-61). They show slightly depleted to flat trace element patterns. The ultramafic rocks (serpentinite) could be genetically related to the mafic rocks. The meta-dacite-rhyolite is adakitic with enriched light and middle REEs and LILEs, but significantly depleted HFSEs. The quartz diorite has high Mg-number (60-64), moderately enriched light and middle REEs and LILEs. The TIC shows distinct light but moderate middle REE-enrichment, prominent Nb-Ta-depletion but Zr-Hf-enrichment (Zr/Sm > 100). The quartz monzodiorite has moderate light and middle REE-enrichment, significant Nb-Ta-depletion, and negative Eu-/Sr-anomalies. The TTG has more depleted Sr-Nd isotopes (epsilon Nd-t = +2-+6: Sr-87/Sr-86(t) = similar to 0.700) than all the others (epsilon Nd-t = 0-+ 2; Sr-87/Sr-86(t) = 0.701-703). Their petrogenesis can be explained by an Archaean-style subduction defined as a mantle wedge-absent flat-'hot'-subduction with significant vertical tectonism in the overriding slab: the ultramafic-mafic rocks were originated from primitive mantle; the meta-dacite-rhyolite was originated from the eclogite fades overriding crust; the quartz diorite was a mixture of melts from mantle and the overriding crust; the TTG was from the subducting slab under amphibolite to amphibole-bearing eclogite fades; and the quartz monzodiorite was from the subducting slab after the derivation of the TTG. The Qingyuan terrain represents remnants of the root of a Neoarchaean arc: its anticlockwise P-T-path recorded the initiation of the arc to its cession and exhumation/cratonization at similar to 2480 Ma. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词	EARLY CONTINENTAL-CRUST ; P-T PATH ; TRONDHJEMITE-GRANODIORITE TTG ; LIAONING PROVINCE CONSTRAINTS ; MESOARCHAEAN OCEANIC-CRUST ; SOUTHERN WEST GREENLAND ; CENTRAL OROGENIC BELT ; TECTONIC EVOLUTION ; HF ISOTOPES ; SUBDUCTION ZONE
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000366227400002
资助机构	National Basic Research Program of China(2012CB416601) ; National Basic Research Program of China(2012CB416601) ; National Basic Research Program of China(2012CB416601) ; National Basic Research Program of China(2012CB416601) ; National Natural Science Foundation of China(41322018 ; National Natural Science Foundation of China(41322018 ; National Natural Science Foundation of China(41322018 ; National Natural Science Foundation of China(41322018 ; National High-Level Talents Special Support Plan(C201203131) ; National High-Level Talents Special Support Plan(C201203131) ; National High-Level Talents Special Support Plan(C201203131) ; National High-Level Talents Special Support Plan(C201203131) ; 41210003) ; 41210003) ; 41210003) ; 41210003) ; National Basic Research Program of China(2012CB416601) ; National Basic Research Program of China(2012CB416601) ; National Basic Research Program of China(2012CB416601) ; National Basic Research Program of China(2012CB416601) ; National Natural Science Foundation of China(41322018 ; National Natural Science Foundation of China(41322018 ; National Natural Science Foundation of China(41322018 ; National Natural Science Foundation of China(41322018 ; National High-Level Talents Special Support Plan(C201203131) ; National High-Level Talents Special Support Plan(C201203131) ; National High-Level Talents Special Support Plan(C201203131) ; National High-Level Talents Special Support Plan(C201203131) ; 41210003) ; 41210003) ; 41210003) ; 41210003)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62154]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Peng, Peng,Wang, Chong,Wang, Xinping,et al. Qingyuan high-grade granite-greenstone terrain in the Eastern North China Craton: Root of a Neoarchaean arc[J]. TECTONOPHYSICS,2015,662:7-21.
APA	Peng, Peng,Wang, Chong,Wang, Xinping,&Yang, Shuyan.(2015).Qingyuan high-grade granite-greenstone terrain in the Eastern North China Craton: Root of a Neoarchaean arc.TECTONOPHYSICS,662,7-21.
MLA	Peng, Peng,et al."Qingyuan high-grade granite-greenstone terrain in the Eastern North China Craton: Root of a Neoarchaean arc".TECTONOPHYSICS 662(2015):7-21.