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Nature and evolution of lithospheric mantle beneath the western North China Craton: Constraints from peridotite and pyroxenite xenoliths in the Sanyitang basalts

文献类型：期刊论文

作者Zhao, Xinmiao4,5; Wang, Hui3,5; Li, Zhihan3,5; Evans, Noreen J.1; Ying, Jifeng4,5; Yang, Yueheng4,5; Zhang, Hongfu2
刊名LITHOS
出版日期2021-03-01
卷号384页码:15
关键词Lherzolite Websterite Lithospheric mantle The western North China Craton
ISSN号0024-4937
DOI10.1016/j.lithos.2021.105987
英文摘要This paper reports petrology, major and trace element abundances in bulk-rocks and minerals, and clinopyroxene Sr-Nd-Hf compositions froma suite ofmantle xenoliths entrained in Cenozoic Sanyitang alkali basalts, Jining County in the InnerMongolia Suture Zone. The aimis to constrain the nature and evolution of the lithospheric mantle beneath thewestern North China Craton. The Sanyitang mantle xenoliths are mainly anhydrous spinel lherzolites with subordinate websterites. Petrological and geochemical features of the spinel lherzolites suggest that they are refractory mantle residues formed by variable degrees ofmelt extraction (3-14%), followed by silicate and carbonatite metasomatism. The Sr-Nd-Hf isotopic compositions (Sr-87/Sr-86 = 0.7031-0.7037, epsilon(Nd)=+5.2 - +11.2 and epsilon(Hf) = +8.4 - +29.3) of clinopyroxene separates from the majority of the spinel lherzolites lie on, or close to, the mantle array defined by the composition of ocean- island basalts and midocean ridge basalts. On the other hand, clinopyroxene separates from a minority of spinel lherzolites (SYT0901, SYT09-09, SYT11-01) have high Sr-87/Sr-86 (0.7040-0.7049), epsilon(Nd) (+12.4 - +21.9) and epsilon(Hf) (+58.2 - +67.8), above the mantle array, reflecting long-term depletion of the mantle. The websterites are characterized by lower MgO (18-22 wt%) and higher Al2O3 contents (4.5-5.6 wt%), and lower Mg# (86.2-87.3) than the spinel lherzolites (Mg# = 89.3-90.8; Al2O3 = 0.9-3.6 wt%). Their convex upward rare earth element patterns, along with lowerNi contents (334-389 ppm) indicate that theywere cumulates fractionated from basaltic magmas circulating through the upper mantle. The trace element patterns of clinopyroxenes from three phlogopite-free websterites show enrichment in large ion lithophile and negative anomalies for the high field strength elements. In addition, the phlogopite-free websterite clinopyroxene Sr-Nd-Hf isotope ratios plot in the enriched lithospheric field (Sr-87/Sr-86 = 0.7058-0.7061, epsilon(Nd) = -9.2 to -8.4 and eHf = -5.2 to -3.7 respectively), which implies the contribution of recycled lower crustal materials to their source. The presence of phlogopite in some Sanyitang websterites, coupled with strong enrichments in both light rare earth elements and large ion lithophile elements, as well as high Sr-87/Sr-86 (0.7065-0.7068) and negative epsilon(Nd) (-1.5 to -0.3) and epsilon(Hf) (-6.1 to -4.8) values of clinopyroxene, provide strong evidence for the existence of subduction-related hydrous fluids/melts metasomatism. This study demonstrates that the Sanyitang mantle xenoliths and their component minerals record the complex petrological history and local heterogeneity of the subcontinental mantle lithosphere under the western North China Craton. (C) 2021 Elsevier B.V. All rights reserved.
WOS关键词OCEANIC UPPER-MANTLE ; LU-HF ; ULTRAMAFIC XENOLITHS ; SPINEL PERIDOTITES ; SHANDONG PROVINCE ; TRACE-ELEMENTS ; MELT REACTION ; GEOCHEMISTRY ; ND ; SR
资助项目National Science Foundation of China[41688103] ; National Science Foundation of China[41973015] ; National Science Foundation of China[41673021] ; National Key R&D Program of China[2019YFA0708400]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000652195000026
出版者ELSEVIER
资助机构National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101191]  
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Zhao, Xinmiao
作者单位1.Curtin Univ, Sch Earth & Planetary Sci, John de Laeter Ctr, Perth, WA 6945, Australia
2.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Xinmiao,Wang, Hui,Li, Zhihan,et al. Nature and evolution of lithospheric mantle beneath the western North China Craton: Constraints from peridotite and pyroxenite xenoliths in the Sanyitang basalts[J]. LITHOS,2021,384:15.
APA Zhao, Xinmiao.,Wang, Hui.,Li, Zhihan.,Evans, Noreen J..,Ying, Jifeng.,...&Zhang, Hongfu.(2021).Nature and evolution of lithospheric mantle beneath the western North China Craton: Constraints from peridotite and pyroxenite xenoliths in the Sanyitang basalts.LITHOS,384,15.
MLA Zhao, Xinmiao,et al."Nature and evolution of lithospheric mantle beneath the western North China Craton: Constraints from peridotite and pyroxenite xenoliths in the Sanyitang basalts".LITHOS 384(2021):15.

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来源：地质与地球物理研究所

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