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Ca. 2.1 Ga low-delta O-18 gabbro-diorite association in southern North China Craton: Implications for an intraplate rifting

文献类型：期刊论文

作者Zheng, Yali5,6,7; Zhou, Yanyan6,7; Zhai, Mingguo5,6,7; Wang, Xinping4; Deng, Xiaoqin3; Liu, Runchuan5,6,7; Zhao, Taiping1; Wu, Tengfei2
刊名LITHOS
出版日期2022-11-15
卷号430-431页码:17
关键词North China Craton Gabbro-diorite Paleoproterozoic Rift setting Petrogenesis
ISSN号0024-4937
DOI10.1016/j.lithos.2022.106858
英文摘要Although widespread ca. 2.2-2.1 Ga igneous activities were identified through the North China Craton (NCC), their petrogenesis and implications for the Paleoproterozoic tectonic regime of the NCC are still under hot debate. Here we present the 2.18-2.14 Ga gabbro-diorite plutons in the Xiong'ershan Taihua Complex, southern North China Craton. They are dominantly gabbros with minor as gabbroic-dioritic rocks. The samples exhibit transitional geochemical characteristics from tholeiitic to calc-alkali series with enrichment in LREEs (e.g., La/ Yb-N = 1.90-13.9) and LILEs (e.g., Rb, Ba and Sr) but depletion in HFSE (e.g., Nb, Ta and Ti), corresponding to affinity of arc-related magmatism. The high Fe2O3 (8.90-14.91 wt%), CaO (6.78-9.81 wt%) contents, and Ti/Y ratios (179-635), low Th concentrations (0.11-4.08 ppm), and consistent La/Nb and Th/Nb ratios, preclude significant crustal contamination during magma emplacement. The samples show negative zircon epsilon(Hf)(t) (-7.3--1.6) and whole-rock epsilon(Nd)(t) (-4.0-+0.9) values with much older model ages (TDMHf = 2811-2606 Ma and TDMNd = 3069-2711 Ma) than their formation ages, along with high La/Nb (1.69-6.21) and low La/Ba (0.01-0.05) ratios, indicating a refertilized Archean lithospheric mantle source. Considering that zircons of 2.18-2.14 Ga gabbro-diorite in the Xiong'ershan area lack metamict features and exhibit originally low but homogeneous delta O-18 values in the mantle source (3.04 parts per thousand to 5.07 parts per thousand, 4.21 parts per thousand on average), we prefer they derived from preexisting O-18-depleted mantle source, which might be a highly heterogeneous metasomatized SCLM by subducted-fluid during the Archean cratonization. The consistent Sm/Yb and La/Sm ratios indicate similar to 5-30% partial melting of the garnet-spinel dominant source region. Combing the low delta O-18 signature and within-plate (high Zr, Zr/Y, Th/Hf and Ta/Hf) geochemical features, we suggest a thermal anomaly linked to a rift setting could account for the mantle melting. The intraplate ca. 2.1 Ga low-delta O-18 magmatism possibly resembles those during the Neoproterozoic glaciations associated with major dispersal periods of Rodinia. To better understand the Paleoproterozoic tectonic evolution of the NCC, we have also comprehensively compiled all the published ages and geochemical data of the 2.2-2.1 Ga mafic-felsic igneous rocks. The mafic suites can be divided into two groups based on ages and geochemical affinities. Mafic rocks of Group 1 (2.19-2.12 Ga) belong to rift-related basalts, together with spatially associated 2.19-2.13 Ga A-type granitic rocks and volcano-sedimentary associations, likely indicating an intraplate rift setting. Whereas mafic rocks of Group 2 (2.15-2.06 Ga) show geochemical affinity of island arc calc-alkaline basalts, together with coeval 2.18-2.05 Ga I-S type granitic associations, implying an arc-related setting and recording a possible tectonic transition from extension to subduction-collision. The rifting events in the NCC during 2.2-2.1 Ga may coincide with the global lithospheric break-up of the supercontinent, and the subsequent tectonic transition could correspond to development of the globally orogenesis at 2.1-1.8 Ga.
WOS关键词LIAO-JI BELT ; PB ZIRCON GEOCHRONOLOGY ; META-MAFIC ROCKS ; TAIHUA COMPLEX ; CONTINENTAL-CRUST ; TRACE-ELEMENT ; PALEOPROTEROZOIC EVOLUTION ; ZANHUANG COMPLEX ; ISOTOPE EVIDENCE ; VOLCANIC-ROCKS
资助项目National Natural Science Foundation of China[41972202] ; National Natural Science Foundation of China[41890830] ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; [41890831]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000856911000001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution ; Independent Research Project of the State Key Laboratory of Lithospheric Evolution
源URL[http://ir.iggcas.ac.cn/handle/132A11/108368]  
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Zhou, Yanyan
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China
2.Oklahoma Geol Survey, Norman, OK 73019 USA
3.Guangdong Acad Sci, Inst Microbiol, Guangzhou, Peoples R China
4.Shanxi Normal Univ, Sch Geog Sci, Taiyuan 030092, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100049, Peoples R China
7.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zheng, Yali,Zhou, Yanyan,Zhai, Mingguo,et al. Ca. 2.1 Ga low-delta O-18 gabbro-diorite association in southern North China Craton: Implications for an intraplate rifting[J]. LITHOS,2022,430-431:17.
APA Zheng, Yali.,Zhou, Yanyan.,Zhai, Mingguo.,Wang, Xinping.,Deng, Xiaoqin.,...&Wu, Tengfei.(2022).Ca. 2.1 Ga low-delta O-18 gabbro-diorite association in southern North China Craton: Implications for an intraplate rifting.LITHOS,430-431,17.
MLA Zheng, Yali,et al."Ca. 2.1 Ga low-delta O-18 gabbro-diorite association in southern North China Craton: Implications for an intraplate rifting".LITHOS 430-431(2022):17.

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来源：地质与地球物理研究所

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