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Geochemistry and petrogenesis of the Early Cretaceous high-K calc-alkaline volcanic rocks in the northern part of Yishu fault, East China

文献类型：期刊论文

作者Meng FanChao3; Qu ZhiJing1,3; Cui Yan5; Chen Yong3; Zhang ShangKun4; Zhou YaoQi3; Wu ZhiPing3; Liu JiaQi2
刊名ACTA PETROLOGICA SINICA
出版日期2020
卷号36期号:11页码:3265-3286
关键词Yishu fault Early Cretaceous HKCA volcanic rocks Petrogenesis Tectonic setting
ISSN号1000-0569
DOI10.18654/1000-0569/2020.11.02
英文摘要A large number of the Mesozoic volcanic rocks developed in the Yishu fault, whose origin are of great significance to analyze the activities of the fault. In this paper, the petrology, zircon U-Pb geochronology, major elements, trace elements and Sr-Nd-Pb isotopes of the volcanic rocks in Weifang, Anqiu and Tangwu areas are studied, aimed to investigate the genesis and geodynamics of these volcanic rocks. Zircon U-Pb dating results of the volcanic rocks yield U-Pb ages concentrating at 131 similar to 124Ma, indicating their eruption during the Early Cretaceous. The volcanic rocks are high-K calc-alkaline (HKCA) series, including basaltic andesite, trachyandensite, trachyte and dacite. They are enriched with large ion lithophilic elements such as Rb and Ba and relatively depleted in high field strengths such as Nb, Ta and Ti. The content of rare earth elements is high (Sigma REE = 140.5 x 10(-6) similar to 433.1 x 10(-6)), enrichment of light rare earth elements and depleted heavy rare earth elements (Sigma LREE/Sigma HREE = 9.8 similar to 31.0), without obvious Eu negative anomaly. The volcanic rocks have rich and highly variable Sr-Nd-Pb isotopes, (Sr-87/Sr-86)(i) = 0.708054 similar to 0.711692, epsilon(Nd) (t) = -15.3 similar to -7.4, ((206) Pb/(204) Pb)(i) = 17.213 similar to 17.962, ((207) Pb/(204) Pb)(i) = 15.425 similar to 15.590, ((208) Pb/(204) Pb)(i) = 37.597 similar to 38.365. It can be concluded that the HKCA volcanic rocks have the same magma source with the basic rocks in the Yishu fault. Both of them were derived from enriched lithosphere mantle. Basaltic andesite, trachyandensite and trachyte were formed by crystallization of basic magma. Dacite were suffered from strong contamination of the lower crust of North China Craton. Triassic, the ancient lithospheric mantle was subjected metasomatsim to form enriched lithosphere mantle by the fluid or melt from subducting Yangtze continental crust. Up to the Early Cretaceous, due to the subduction and rollback of the ancient Pacific plate towards Eurasian continent, the basic magma was generated by the partial melting of the enriched lithospheric mantle. HKCA volcanic rocks were formed through crystallization of basic magma. During the rise of magma, partial magma was suffered from crustal material contamination along the Yishu fault.
WOS关键词WESTERN SHANDONG PROVINCE ; SULU OROGENIC BELT ; MESOZOIC MAFIC MAGMATISM ; CRUST-MANTLE INTERACTION ; PALEO-PACIFIC SLAB ; CONTINENTAL-CRUST ; LITHOSPHERIC MANTLE ; ISOTOPIC EVIDENCE ; TECTONIC IMPLICATIONS ; INTRUSIVE COMPLEX
WOS研究方向Geology
语种英语
WOS记录号WOS:000605112900002
出版者SCIENCE PRESS
源URL[http://ir.iggcas.ac.cn/handle/132A11/99984]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Meng FanChao
作者单位1.Shengli Oilfield Co, SINOPEC, Dongxin Oil Prod Plant, Dongying 257000, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 1000295, Peoples R China
3.China Univ Petr East China, Sch Geosci, Qingdao 266580, Peoples R China
4.Shandong Inst Geol Sci, Jinan 250013, Peoples R China
5.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Peoples R China
推荐引用方式
GB/T 7714		 Meng FanChao,Qu ZhiJing,Cui Yan,et al. Geochemistry and petrogenesis of the Early Cretaceous high-K calc-alkaline volcanic rocks in the northern part of Yishu fault, East China[J]. ACTA PETROLOGICA SINICA,2020,36(11):3265-3286.
APA Meng FanChao.,Qu ZhiJing.,Cui Yan.,Chen Yong.,Zhang ShangKun.,...&Liu JiaQi.(2020).Geochemistry and petrogenesis of the Early Cretaceous high-K calc-alkaline volcanic rocks in the northern part of Yishu fault, East China.ACTA PETROLOGICA SINICA,36(11),3265-3286.
MLA Meng FanChao,et al."Geochemistry and petrogenesis of the Early Cretaceous high-K calc-alkaline volcanic rocks in the northern part of Yishu fault, East China".ACTA PETROLOGICA SINICA 36.11(2020):3265-3286.

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来源：地质与地球物理研究所

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