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

doi:10.1002/gj.3722

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地质与地球化学研究室

	An Early Cretaceous record of trachyte from the red bed basin of the southwest Dabie Orogen, Central China: Implications for tectonic evolution and geodynamics
	Wang, Shiming 2; Ma, Changqian 1,5; Yang, Ying 6; Li, Jiwei 3; Zhang, Jinyang 4; Pei, Qiuming 2
刊名	GEOLOGICAL JOURNAL
	2020-07-01
卷号	55 期号:7 页码:5101-5118
关键词	Early Cretaceous red bed basin the Dabie Orogen trachyte zircon U-Pb dating
ISSN号	0072-1050
DOI	10.1002/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
内容类型	期刊论文
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, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 2.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu, Peoples R China 3.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya, Peoples R China 4.China Univ Geosci, Fac Resources, Wuhan, Peoples R China 5.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 6.China Geol Survey, Chengdu Ctr, 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.