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Geochemistry of similar to 2.7 Ga basalts from Taishan area: Constraints on the evolution of early Neoarchean granite-greenstone belt in western Shandong Province, China

文献类型：期刊论文

作者Wang, Wei1,2,3; Yang, Enxiu4; Zhai, Mingguo1; Wang, Shijin4; Santosh, M.5,6; Du, Lilin2; Xie, Hangqiang2; Lv, Bin1; Wan, Yusheng2
刊名PRECAMBRIAN RESEARCH
出版日期2013
卷号224页码:94-109
关键词Geochemistry Basaltic lava sequence Taishan association Early Neoarchean Western Shandong Province
ISSN号0301-9268
DOI10.1016/j.precamres.2012.09.009
文献子类Article
英文摘要Western Shandong Province (WSP) is one of the typical Neoarchean granite-greenstone belts in the North China Craton (NCC). The Taishan association, consisting of a similar to 2.7 Ga komatiite-tholeiite sequence and a similar to 2.5 Ga felsic volcanic-sedimentary sequence, is the major supracrustal assemblage in the WSP. The similar to 2.7 Ga komatiite-tholeiite sequence can be subdivided into the Yanlingguan and Liuhang units. The 150-800 m thick basaltic lava sequence of the Liuhang unit is exposed in the Qixingtai area, with the bottom unit composed of massive and layered basalts. Pillow basalts and tuff dominate the upper parts of the sequence. We report a weighted mean SHRIMP Pb-207/Pb-206 zircon age of 2706 +/- 9 Ma (MSWD = 0.61) for a trondhjemitic dike that intrudes the base of the pillow basalts, constraining the timing of this sequence to be older than this age. The basaltic lava sequence in the Liuhang unit is characterized by voluminous tholeiites and a minor component of enriched basalts. The tholeiites show relatively high MgO (5.5-9.0 wt.%), but low TiO2 (0.8-1.3 wt.%) and Nb (2.1-3.3 ppm) contents. They display co-variations between Zr and other immobile trace elements and flat REE and trace elements patterns on chondrite- and primary mantle-normalized diagrams, respectively. In contrast, the enriched basalts have low MgO (3.6-5.4 wt.%), but high TiO2 (1.6-2.2 wt.%) and Nb (8.4-11.6 ppm) contents. They display moderately enriched LREE and fractionated HREE patterns on chondrite-normalized diagrams. The basaltic sequence of the Liuhang unit displays a moderate range of initial epsilon(Nd) (-0.1 to +3.0) values. The element concentration and Nd isotopes of tholeiitic rocks in the Liuhang unit are comparable with the contemporaneous tholeiites in greenstone belts globally. In particular, the geochemical systematics of the tholeiite and enriched basalts show close similarity with those of the Wawa greenstone belt in the Superior Province.
WOS关键词TRACE-ELEMENT GEOCHEMISTRY ; ARCHEAN CRUSTAL EVOLUTION ; PB ZIRCON GEOCHRONOLOGY ; PLUME-ARC INTERACTION ; U-PB ; SUPERIOR PROVINCE ; TECTONIC EVOLUTION ; ION MICROPROBE ; GEODYNAMIC PROCESSES ; CONTINENTAL GROWTH
WOS研究方向Geology
语种英语
WOS记录号WOS:000313765800007
出版者ELSEVIER SCIENCE BV
资助机构National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; 41030316) ; 41030316) ; 41030316) ; 41030316) ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; 41030316) ; 41030316) ; 41030316) ; 41030316) ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; 41030316) ; 41030316) ; 41030316) ; 41030316) ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; National Nature Science Foundation of China (NSFC project)(2012CB416601 ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; Open Foundation of the State Key Laboratory of Geological Processes and Mineral Resources ; 41030316) ; 41030316) ; 41030316) ; 41030316)
源URL[http://ir.iggcas.ac.cn/handle/132A11/87638]  
专题中国科学院地质与地球物理研究所
通讯作者Wang, Wei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Beijing SHRIMP Ctr, Beijing 100037, Peoples R China
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
4.Shandong Geol Survey Inst, Jinan 250013, Peoples R China
5.Kochi Univ, Fac Sci, Div Interdisciplinary Sci, Akebono, Kochi 7808520, Japan
6.China Univ Geosci, Journal Ctr, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Wei,Yang, Enxiu,Zhai, Mingguo,et al. Geochemistry of similar to 2.7 Ga basalts from Taishan area: Constraints on the evolution of early Neoarchean granite-greenstone belt in western Shandong Province, China[J]. PRECAMBRIAN RESEARCH,2013,224:94-109.
APA Wang, Wei.,Yang, Enxiu.,Zhai, Mingguo.,Wang, Shijin.,Santosh, M..,...&Wan, Yusheng.(2013).Geochemistry of similar to 2.7 Ga basalts from Taishan area: Constraints on the evolution of early Neoarchean granite-greenstone belt in western Shandong Province, China.PRECAMBRIAN RESEARCH,224,94-109.
MLA Wang, Wei,et al."Geochemistry of similar to 2.7 Ga basalts from Taishan area: Constraints on the evolution of early Neoarchean granite-greenstone belt in western Shandong Province, China".PRECAMBRIAN RESEARCH 224(2013):94-109.

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来源：地质与地球物理研究所

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