Complex metasomatism of lithospheric mantle by asthenosphere-derived melts: Evidence from peridotite xenoliths in Weichang at the northern margin of the North China Craton

doi:10.1016/j.lithos.2016.08.036

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

	Complex metasomatism of lithospheric mantle by asthenosphere-derived melts: Evidence from peridotite xenoliths in Weichang at the northern margin of the North China Craton
	Zou, Dongya 1; Zhang, Hongfu 1,2; Hu, Zhaochu 3; Santosh, M.4,5
刊名	LITHOS
	2016-11-01
卷号	264 页码:210-223
关键词	Peridotite xenoliths North China Craton Asthenosphere-lithosphere interaction Lithospheric refertilization
DOI	10.1016/j.lithos.2016.08.036
文献子类	Article
英文摘要	The petrology, in situ analyses of major and trace elements as well as Sr isotopic compositions of spinel-facies lherzolite and harzburgite xenoliths from Weichang within the northern margin of the North China Craton (NCC) are reported for the first time in this study to evaluate the nature and evolution of the lithospheric mantle. These peridotite xenoliths display porphyroclastic texture and can be subdivided into two groups. Group I peridotites have slightly higher forsterite contents (Fo) (90.6-912) and Sr-87/Sr-86 ratios (0.7025-0.7043) in the cores than those in the rims (89.8-90.8; 0.7025-0.7038) of olivines and clinopyroxenes, respectively. The clinopyroxenes in these rocks exhibit uniform LREE-depleted patterns. These geochemical features suggest that the Group I peridotites were weakly metasomatized by recent asthenospheric melts. In contrast, Group II peridotites show sieve-texture and clear compositional zoning in minerals. The olivines and clinopyroxenes from these rocks have higher Fo (86.9-91.3) and Sr-87/Sr-86 ratios (0.7035-0.7049) in the cores than those in the rims (76.9-90.6; 0.7021-0.7046). The clinopyroxenes show three types of REE patterns: LREE-enriched, convex-upward and spoon-shaped. The LREE-enriched clinopyroxenes have the highest (La/Yb)(N) and lowest Ti/Eu and those with spoon-shaped REE patterns show an increase in LREE, Ba, Th and U contents from the cores to the rims. These features indicate that the Group II peridotites witnessed a high degree of refertilization by recent asthenosphere-derived silicate and carbonatite melts or their mixture. Compared with the data of the Mesozoic NCC lithospheric mantle, the heterogeneous and low Sr-87/Sr-86 ratios (0.7025-0.7049) in the LREE-depleted clinopyroxenes reveal that the ancient lithospheric mantle could have been modified by asthenospheric melts before the recent metasomatism event. We conclude that the lithospheric mantle beneath Weichang underwent multiple modifications through asthenosphere-lithosphere interaction, which plays an important role in the transformation of the lithospheric mantle of the NCC at least during Cenozoic. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	SINO-KOREAN CRATON ; ASIAN OROGENIC BELT ; TRACE-ELEMENT ; LASER-ABLATION ; EASTERN CHINA ; CENOZOIC BASALTS ; INNER-MONGOLIA ; ICP-MS ; CARBONATITE METASOMATISM ; ULTRAMAFIC XENOLITHS
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
WOS记录号	WOS:000387191600016
资助机构	973 project(2013CB429801) ; 973 project(2013CB429801) ; Natural Science Foundation of China(41473003 ; Natural Science Foundation of China(41473003 ; Program for Changjiang Scholars and Innovative Research Team in University(IRT1281) ; Program for Changjiang Scholars and Innovative Research Team in University(IRT1281) ; 91414301) ; 91414301) ; 973 project(2013CB429801) ; 973 project(2013CB429801) ; Natural Science Foundation of China(41473003 ; Natural Science Foundation of China(41473003 ; Program for Changjiang Scholars and Innovative Research Team in University(IRT1281) ; Program for Changjiang Scholars and Innovative Research Team in University(IRT1281) ; 91414301) ; 91414301)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53275]
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.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Fac Earth Sci, Wuhan 430074, Peoples R China 4.Univ Adelaide, Dept Earth Sci, Ctr Tecton Resources & Explorat, Adelaide, SA 5005, Australia 5.China Univ Geosci Beijing, Sch Earth Sci & Resources, 29 Xueyuan Rd, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zou, Dongya,Zhang, Hongfu,Hu, Zhaochu,et al. Complex metasomatism of lithospheric mantle by asthenosphere-derived melts: Evidence from peridotite xenoliths in Weichang at the northern margin of the North China Craton[J]. LITHOS,2016,264:210-223.
APA	Zou, Dongya,Zhang, Hongfu,Hu, Zhaochu,&Santosh, M..(2016).Complex metasomatism of lithospheric mantle by asthenosphere-derived melts: Evidence from peridotite xenoliths in Weichang at the northern margin of the North China Craton.LITHOS,264,210-223.
MLA	Zou, Dongya,et al."Complex metasomatism of lithospheric mantle by asthenosphere-derived melts: Evidence from peridotite xenoliths in Weichang at the northern margin of the North China Craton".LITHOS 264(2016):210-223.