Petrogenesis of Neoarchean metavolcanic rocks in Changyukou, Northwestern Hebei: Implications for the transition stage from a compressional to an extensional regime for the North China Craton

doi:10.1016/j.lithos.2016.12.019

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	Petrogenesis of Neoarchean metavolcanic rocks in Changyukou, Northwestern Hebei: Implications for the transition stage from a compressional to an extensional regime for the North China Craton
	Liou, Peng 1,2; Shan, Houxiang 1,2; Liu, Fu 1; Guo, Jinghui 1
刊名	LITHOS
	2017-03-01
卷号	274 页码:53-72
关键词	Volcanic Rocks Northwestern Hebei North China Craton Archean Lower Crust Archean Subduction Zone Plate Rollback
ISSN号	0024-4937
DOI	10.1016/j.lithos.2016.12.019
文献子类	Article
英文摘要	The 2.5 Ga metavolcanic rocks in Changyukou, Northwestern Hebei, can be classified into three groups based on major and trace elements: high-Mg basalts, tholeiitic basalts, and the calc-alkaline series (basaltic andesites-andesites and dacites-rhyolites). Both high-Mg basalts and tholeiitic basalts have negative anomalies of Nb, Zr, Ti and Heavy Rare Earth Elements (HREE) as well as enrichments of Sr, K, Pb, Ba and Light Rare Earth Elements (LREE) and show typical subduction zone affinities. The petrogenesis of high-Mg basalts can be ascribed to high-degree partial melting of an enriched mantle source in the spinel stability field that was previously enriched in Large Ion Lithophile Elements (LILE) and LREE by slab-derived hydrous fluids/melts/supercritical fluids, as well as the subsequent magma mixing processes of different sources at different source depths, with little or no influence of polybaric fractional crystallization. The flat HREE of tholeiitic basalts indicates they may also originate from the spinel stability field, but from obviously shallower depths than the source of high-Mg basalts. They may form at a later stage of the subduction process when rapid slab rollback leads to extension and seafloor spreading in the upper plate. We obtain the compositions of the Archean lower crust of the North China Craton based on the Archean Wutai-Jining section by compiling the average tonalite-trondhjemite-granodiorite (TTG) components, average mafic granulite components, and average sedimentary rock components. The modeling results show that the generation of high-Al basalts, basaltic andesites and andesites can be attributed to assimilation by high-Mg basalts (primary basalts) of relatively high-Al2O3 thickened lower crust and the subsequent crystallization of prevailing mafic mineral phases, while Al2O3-rich plagioclase crystallization is suppressed under high-pressure and nearly water-saturated conditions. Dacites and rhyolites may be the result of further fractional crystallization of basaltic andesites (high-Al basalts) and andesites. Mixing of magmas at various stages along the fractionation course of basaltic andesites (high-Al basalts) toward rhyolites promotes the trend of the calc-alkaline series. To reconcile the 2.55 to 2.5 Ga TTGs derived from overthickened crust, the 2.51 to 250 Ga calc-alkaline volcanic rocks derived from thickened crust, tholeiitic basalts representing low pressure and an extensional tectonic setting, 2493 Ma leucosyenogranites derived from overthickened crust, 2437 Ma biotite-monzogranites derived from slightly thinner crust than leucosyenogranites but still thickened, as well as the clockwise hybrid ITD and IBC P-T paths of the HP granulites and widespread extension and rifting setting within the NCC from 2300 Ma, we propose a model of an evolving subduction process. Among them, the composition of the 2.5 Ga Changyukou volcanic rocks and potassic granites as well as the clockwise hybrid ITD and IBC P-T paths of the HP granulites may reveal that the tectonic setting in Northwest Hebei was in a transition stage from a subduction-related compressional regime to an extensional regime related to plate rollback. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	U-PB GEOCHRONOLOGY ; HIGH-PRESSURE GRANULITES ; ALKALINE MAGMA SERIES ; RARE-EARTH-ELEMENTS ; ISLAND-ARC BASALTS ; IN-SITU ANALYSIS ; LU-HF ISOTOPES ; LA-ICP-MS ; TRACE-ELEMENT ; SANGGAN AREA
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000397375400005
资助机构	National Natural Science Foundation of China(41672190) ; National Natural Science Foundation of China(41672190) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; National Natural Science Foundation of China(41672190) ; National Natural Science Foundation of China(41672190) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; National Natural Science Foundation of China(41672190) ; National Natural Science Foundation of China(41672190) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; National Natural Science Foundation of China(41672190) ; National Natural Science Foundation of China(41672190) ; Chinese Academy of Science Priority Strategic Program(XDB18030205) ; Chinese Academy of Science Priority Strategic Program(XDB18030205)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53020]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Guo, Jinghui
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	Liou, Peng,Shan, Houxiang,Liu, Fu,et al. Petrogenesis of Neoarchean metavolcanic rocks in Changyukou, Northwestern Hebei: Implications for the transition stage from a compressional to an extensional regime for the North China Craton[J]. LITHOS,2017,274:53-72.
APA	Liou, Peng,Shan, Houxiang,Liu, Fu,&Guo, Jinghui.(2017).Petrogenesis of Neoarchean metavolcanic rocks in Changyukou, Northwestern Hebei: Implications for the transition stage from a compressional to an extensional regime for the North China Craton.LITHOS,274,53-72.
MLA	Liou, Peng,et al."Petrogenesis of Neoarchean metavolcanic rocks in Changyukou, Northwestern Hebei: Implications for the transition stage from a compressional to an extensional regime for the North China Craton".LITHOS 274(2017):53-72.