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Termination Time of the Emeishan Basalts in the Buotuo Region, SW China
Author(s) -
TAN Hongqi,
NI Zhiyao,
ZHU Zhimin,
XU Gang,
ZHANG Jiong
Publication year - 2018
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13745
Subject(s) - basalt , china , geology , geochemistry , geography , archaeology
The Emeishan Large Igneous Province (LIP) is considered to represent a major Later Permian basaltic magmatism in the western margin of the Yangtze Block in South China. Previous geochronological studies on mafic intrusion and felsic ignimbrite have assigned an eruption age of 259–263 Ma for the Emeishan LIP (Zhong et al., 2010), accompanied by regional domal uplift (Mabi Awei et al., 2017). The Xuanwei Formation was formed after the termination of the Emeishan flood basalt volcanism. The uppermost silicic members in the center of the LIP were eroded first and the “felsic” materials were transported and deposited in the eastern LIP, forming the lowermost part of the Xuanwei Formation. In this study, we report new data related to zircon LA-ICP-MS U-Pb and Hf isotope analysis at the bottom of Xuanwei Formation in the Butuo region of Sichuan Province, SW China. These data provide important insight into understanding the termination of the Emeishan LIP.