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The Early Cretaceous bimodal volcanic suite from the Yinshan Block, western North China Craton: Origin, process and geological significance
Guo, Pengyuan1,2; Niu, Yaoling1,2,3,4; Sun, Pu1,2; Wang, Xiaohong1,2; Gong, Hongmei1,2; Duan, Meng4; Zhang, Yu2; Kong, Juanjuan1,2; Tian, Liyan5; Wu, Shiguo5; Pengyuan Guo, Yaoling Niu; Guo, Pengyuan(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China); Niu, Yaoling(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China)
2018-07-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
Volume160Issue:160Pages:348-364
Contribution Rank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
AbstractWe 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.
SubtypeArticle
KeywordBimodal Volcanic Suite North China Craton High Sr-87/sr-86 Ratios Intra-plate Volcanism Lower Crust Re-working Lithosphere Thinning
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jseaes.2017.10.023
URL查看原文
Indexed BySCI
Language英语
WOS KeywordLOWER CONTINENTAL-CRUST ; SINO-KOREAN CRATON ; EASTERN CHINA ; TRACE-ELEMENT ; LITHOSPHERE BENEATH ; CENOZOIC BASALTS ; ETHIOPIAN RIFT ; INNER-MONGOLIA ; SW CHINA ; DALY-GAP
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000434751500023
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/5937
Collection深海科学研究部_深海地质与地球化学研究室
Corresponding AuthorGuo, Pengyuan; Niu, Yaoling; Pengyuan Guo, Yaoling Niu; Guo, Pengyuan(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China); Niu, Yaoling(Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China)
Affiliation1.Chinese Acad Sci, Inst Oceanol, Nanhai Rd 7, Qingdao 266071, Shandong, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
4.China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China
5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
Recommended Citation
GB/T 7714
Guo, Pengyuan,Niu, Yaoling,Sun, Pu,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 Guo, Pengyuan.,Niu, Yaoling.,Sun, Pu.,Wang, Xiaohong.,Gong, Hongmei.,...&Niu, Yaoling.(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 Guo, Pengyuan,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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