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An Early Cretaceous record of trachyte from the red bed basin of the southwest Dabie Orogen, Central China: Implications for tectonic evolution and geodynamics

文献类型：期刊论文

作者Wang, Shiming6; Ma, Changqian4,5; Yang, Ying3; Li, Jiwei2; Zhang, Jinyang1; Pei, Qiuming6
刊名GEOLOGICAL JOURNAL
出版日期2020-07-01
卷号55期号:7页码:5101-5118
ISSN号0072-1050
关键词Early Cretaceous red bed basin the Dabie Orogen trachyte zircon U-Pb dating
DOI10.1002/gj.3722
英文摘要Zircon U-Pb ages of approximately 130 Ma were obtained from trachytes in Xiaochang County, at the southwestern margins of the Dabie Mountains, in Central China. The SiO(2)and K2O contents of these trachytes range between 56.78-63.77% and 3.76-5.07%, respectively, while Rittmann indexes (delta) range between 3.7 and 6.8. These characteristics indicate that the trachytes belong to the alkaline series. The trachytes are enriched in large-ion lithophile elements (LILEs) but are depleted in high-field-strength elements (HFSEs). The initial(87)Sr/Sr-86 values of the trachytes range from 0.7060 to 0.7072, with negative epsilon Nd(t) values varying from -10.43 to -12.88. The weighted averages of the zircon epsilon Hf(t) and T(DM2)values are -11.7 +/- 0.5 and 1921 +/- 28 Ma, respectively. The presence of Early Cretaceous K-rich volcanic rocks at the southwestern margins of the Dabie Mountains has been confirmed for the first time. This finding fills a gap regarding the presence of Mesozoic volcanic rocks in this region and limits the earliest possible formation age of the red bed basin at the southwestern margins of the Dabie Mountains to the Early Cretaceous. The trachytes originate from partial melting of enriched mantle. They are closely related to major regional faults and represent the eastern extension of the Qinling-Daba alkaline rock belt.
WOS关键词SUBDUCTED CONTINENTAL-CRUST ; U-PB AGE ; VOLCANIC-ROCKS ; EASTERN CHINA ; SR-ND ; ISOTOPIC COMPOSITIONS ; LITHOSPHERIC MANTLE ; IGNEOUS ROCKS ; HF ISOTOPES ; ZIRCON
WOS研究方向Geology
语种英语
出版者WILEY
WOS记录号WOS:000544704000012
源URL[http://ir.idsse.ac.cn/handle/183446/7740]  
专题深海科学研究部_深海地质与地球化学研究室
通讯作者Ma, Changqian
作者单位1.China Univ Geosci, Fac Resources, Wuhan, Peoples R China
2.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya, Peoples R China
3.China Geol Survey, Chengdu Ctr, Chengdu, Peoples R China
4.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China
5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
6.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Shiming,Ma, Changqian,Yang, Ying,et al. An Early Cretaceous record of trachyte from the red bed basin of the southwest Dabie Orogen, Central China: Implications for tectonic evolution and geodynamics[J]. GEOLOGICAL JOURNAL,2020,55(7):5101-5118.
APA Wang, Shiming,Ma, Changqian,Yang, Ying,Li, Jiwei,Zhang, Jinyang,&Pei, Qiuming.(2020).An Early Cretaceous record of trachyte from the red bed basin of the southwest Dabie Orogen, Central China: Implications for tectonic evolution and geodynamics.GEOLOGICAL JOURNAL,55(7),5101-5118.
MLA Wang, Shiming,et al."An Early Cretaceous record of trachyte from the red bed basin of the southwest Dabie Orogen, Central China: Implications for tectonic evolution and geodynamics".GEOLOGICAL JOURNAL 55.7(2020):5101-5118.

入库方式： OAI收割

来源：深海科学与工程研究所

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