Origin of early Triassic rift-related alkaline basalts from Southwest China: age, isotope, and trace-element constraints

	Origin of early Triassic rift-related alkaline basalts from Southwest China: age, isotope, and trace-element constraints
	Jiawei Zhang; Zhilong Huang; Taiyi Luo; Zhikuan Qian; Ying Zhang
通讯作者	Zhilong Huang
	2013
发表期刊	International Geology Review
卷号	55 期号:9 页码:1162-1178
摘要	We report new analytical data regarding major and trace element geochemistry, Sr-Nd isotopic composition, and zircon LA-ICP-MS U-Pb analysis from the Kaiyuan alkaline basalts of Yunnan Province, along the southern margin of the Emeishan Large Igneous Province (ELIP). Zircon U-Pb ages and bulk-rock geochemistry indicate that the mafic lavas erupted at 248 +/- 6Ma with OIB-like trace element and isotope ratios similar to the Emeishan high-Ti basalts. These characters suggest that the Kaiyuan alkaline basalts are the products of the post-ELIP magmatism, involving remelting of the plume head after the main ELIP phase. By analogy with the Neogene Red Sea rift system, the Kaiyuan alkaline basalts may have been caused by a Red Sea-like extension along the southwestern margin of the Yangzte during the Early Triassic, during which the hypothesized rift system experienced plate-boundary forces that vanished quickly in the Late Triassic period.
关键词	Alkaline Basalt Rift System Kaiyuan Alkali Basalt Petrogenesis Emeishan Large Igneous Province Southwest China
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5067
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
通讯作者	Zhilong Huang
推荐引用方式 GB/T 7714	Jiawei Zhang,Zhilong Huang,Taiyi Luo,et al. Origin of early Triassic rift-related alkaline basalts from Southwest China: age, isotope, and trace-element constraints[J]. International Geology Review,2013,55(9):1162-1178.
APA	Jiawei Zhang,Zhilong Huang,Taiyi Luo,Zhikuan Qian,&Ying Zhang.(2013).Origin of early Triassic rift-related alkaline basalts from Southwest China: age, isotope, and trace-element constraints.International Geology Review,55(9),1162-1178.
MLA	Jiawei Zhang,et al."Origin of early Triassic rift-related alkaline basalts from Southwest China: age, isotope, and trace-element constraints".International Geology Review 55.9(2013):1162-1178.

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