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The Early Cretaceous bimodal volcanic suite from the Yinshan Block, western North China Craton: Origin, process and geological significance

文献类型：期刊论文

作者Gong, Hongmei2,3; Duan, Meng5; Zhang, Yu3; Tian, Liyan1; Guo, Pengyuan2,3; Niu, Yaoling2,3,4,5; Sun, Pu2,3; Wang, Xiaohong2,3; Niu, Yaoling(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China); Guo, Pengyuan(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China)
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2018-07-01
卷号160期号:160页码:348-364
关键词Bimodal Volcanic Suite North China Craton High Sr-87/sr-86 Ratios Intra-plate Volcanism Lower Crust Re-working Lithosphere Thinning
DOI10.1016/j.jseaes.2017.10.023
产权排序第1完成单位 ; 第2完成单位 ; 第3完成单位 ; 第4完成单位 ; 第5完成单位
文献子类Article
英文摘要We present geochemical and age data for coeval basalt and rhyolite in the Yinshan Block, western North China Craton, to study the origin of the 'Daly Gap' in this bimodal volcanic suite. SHRIMP zircon U-Pb dating for felsic rocks and bulk rock Ar-40/Ar-38 dating for mafic rocks yield their ages of 107-133 Ma. The basalts show elevated abundances of incompatible elements with [La/Sm](N) = 2.65-3.54 and enriched Sr-Nd-Hf isotopic signatures (Sr-87/Sr-86(t) = 0.7054-0.7084, Nd-143/Nd-144(t) = 0.5119-0.5123, Hf-176/Hf-177(t) = 0.2824-0.2826), consistent with their derivation from low degree melting of previously metasomatized lithospheric mantle. The rhyolites display similar enrichment in alkalis and other incompatible elements, but have obvious Nb-Ta depletion. Combined with their more enriched Nd-Hf isotopic compositions (epsilon(Nd)(t) = -12 to -18, epsilon(Hf)(t) = - 2 to -14), these rhyolites are inferred to have been generated by mixing of the mantle-derived basaltic magma with felsic melts derived from lower continental crust anataxis induced by the basaltic magma. Furthermore, the extremely low Ba, Sr, Eu contents, high Rb/Sr ratios and unexpectedly high Sr-87/Sr-86 (0.7920-0.7159) in these felsic samples also suggests that their parental magma experienced protracted fractional crystallization of plagioclase (K-feldspar to a lesser extent) en route to the surface. This rock association and the unique geochemical characteristics of these volcanic rocks offer a new view on the petrogenesis of bimodal volcanism: the mafic rocks originated from partial melting of the ancient lithospheric mantle. Underplating of the basaltic magmas triggered melting of lower continental crust. The extensive fractional crystallization of the hybridized magma resulted in the highly fractionated rhyolites. This mechanism explains the "Daly Gap" exhibited in this rock association in a continental setting and also the observation that both the lithospheric mantle and crust in East China are thinner than that in West China.
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WOS关键词LOWER CONTINENTAL-CRUST ; SINO-KOREAN CRATON ; EASTERN CHINA ; TRACE-ELEMENT ; LITHOSPHERE BENEATH ; CENOZOIC BASALTS ; ETHIOPIAN RIFT ; INNER-MONGOLIA ; SW CHINA ; DALY-GAP
语种英语
WOS记录号WOS:000434751500023
版本出版稿
源URL[http://ir.idsse.ac.cn/handle/183446/5937]  
专题深海科学研究部_深海地质与地球化学研究室
深海科学研究部_深海地球物理与资源研究室
通讯作者Guo, Pengyuan; Niu, Yaoling; Niu, Yaoling(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China); Guo, Pengyuan(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China); Pengyuan Guo, Yaoling Niu
作者单位1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
4.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
5.China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Gong, Hongmei,Duan, Meng,Zhang, Yu,et al. The Early Cretaceous bimodal volcanic suite from the Yinshan Block, western North China Craton: Origin, process and geological significance[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,160(160):348-364.
APA Gong, Hongmei.,Duan, Meng.,Zhang, Yu.,Tian, Liyan.,Guo, Pengyuan.,...&Kong, Juanjuan.(2018).The Early Cretaceous bimodal volcanic suite from the Yinshan Block, western North China Craton: Origin, process and geological significance.JOURNAL OF ASIAN EARTH SCIENCES,160(160),348-364.
MLA Gong, Hongmei,et al."The Early Cretaceous bimodal volcanic suite from the Yinshan Block, western North China Craton: Origin, process and geological significance".JOURNAL OF ASIAN EARTH SCIENCES 160.160(2018):348-364.

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来源：深海科学与工程研究所

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