New constraints on the onset age of the Emeishan LIP volcanism and implications for the Guadalupian mass extinction

Age and origin of a Guadalupian tuff in the E'Xi rift basin in South China: Evidence for the Emeishan continental hotspot track?

“…Regional stratigraphy of the Gufeng Formation and zircon ages and ε Hf ( t ) values (Yan et al, 2020; Ge et al, 2021; this study). (a) Regional stratigraphy of the Gufeng Formation.…”

“…The Gufeng and Qixia formations in the northern SCB mark the Permian Cisuralian-Guadalupian boundary, as constrained by biostratigraphic evidence (Gradsteina & Ogg, 2009;Sheng & Wang, 1985). The lower Gufeng Formation contains a tuff that has been precisely dated to 273.0 ± 0.1 Ma (Wu et al, 2017), which is F I G U R E 2 Regional stratigraphy of the Gufeng Formation and zircon ages and ε Hf (t) values (Yan et al, 2020;Ge et al, 2021;this (Shi et al, 2016;Wu et al, 2015). In this study, a tuff from the lower Xintang section yielded a zircon U-Pb age of 267 ± 2 Ma, which coincides with the Wordian-Roadian boundary (Figure 2).…”

“…(a) Regional stratigraphy of the Gufeng Formation. (b) Plot of zircon U–Pb ages versus ε Hf ( t ) values for tuffs in the Gufeng Formation in the SCB (samples CP9‐2 and CP6‐2 from the Pingdingshan section are from Ge et al, 2021; samples 14NC‐5 and 14NC‐8 from the Zunyi section are from Yan et al, 2020).…”

Provenance of the Permian–Triassic boundary volcanic ash beds in South China

“…The STLIP (Figure 1a) is recognized as the largest continental flood basalt province, with the peak of volcanic activity occurring at the PTB at~252 Ma over a duration of less than 1 Ma, extending over an area of up to 5 million km 2 and has been linked to the largest known mass extinction (PTB mass extinction) (Burgess & Bowring, 2015;Erwin, 1994;Ivanov et al, 2018;Kamo, Czamanske, & Krogh, 1996;Pavlov, Fluteau, Veseloveskiy, Fetisova, & Latyshev, 2011;Pavlov et al, 2015;Reichow et al, 2002;Reichow et al, 2009;Renne & Basu, 1991;Svetlitskaya & Nevolko, 2016). In addition, the nearest possible source for the PTB volcanic ashes is Emeishan large igneous province (ELIP), which comprises a bimodal mafic-silicic suite with the silicic rocks occurring at the uppermost part of the thick lava sequence (Deng et al, 2020;Xu, Chung, Shao, & He, 2010;Yan et al, 2020;Zhang et al, 2019). ELIP covers an area of over 500,000 km 2 , extending from the inner zone in Yunnan Province, through the Guizhou, Sichuan, and Chongqing provinces, to its periphery in the Youjiang Basin in Guangxi Province (Yan et al, 2020;Zhu, Zhang, Santosh, & Jin, 2020).…”

“…In addition, the nearest possible source for the PTB volcanic ashes is Emeishan large igneous province (ELIP), which comprises a bimodal mafic-silicic suite with the silicic rocks occurring at the uppermost part of the thick lava sequence (Deng et al, 2020;Xu, Chung, Shao, & He, 2010;Yan et al, 2020;Zhang et al, 2019). ELIP covers an area of over 500,000 km 2 , extending from the inner zone in Yunnan Province, through the Guizhou, Sichuan, and Chongqing provinces, to its periphery in the Youjiang Basin in Guangxi Province (Yan et al, 2020;Zhu, Zhang, Santosh, & Jin, 2020).…”