Re-evaluating plume-induced uplift in the Emeishan large igneous province

Magnetostratigraphic constraints on two‐stage eruptions of the Emeishan continental flood basalts

“…[2] The Middle to Upper Permian Emeishan continental flood basalts in southwestern China and northern Vietnam form a major part of the Emeishan large igneous province (ELIP) [e.g., Lin, 1985;Zhang et al, 1988;Chung and Jahn, 1995;Song et al, 2001aSong et al, , 2001bAli et al, 2005;Xu et al, 2008;Ukstins Peate and Bryan, 2008], which covers an area of 0.5 × 10 6 km 2 [Xiao et al, 2004] from the eastern margin of the Tibetan Plateau to the western margin of the Yangtze block. Geochemical studies reveal the characteristic temporal and spatial distributions of high-Ti (HT) and low-Ti (LT) basalts in the ELIP, where the dominant low-Ti basalts with low Ti/Y (<500) and "Nd(t) (−0.34 ∼ −3.76) erupted earlier than the high-Ti basalts with high Ti/Y (>500) and "Nd(t) (−1.17 ∼ 0.43), as they occur in the lower section in the western part of the ELIP, whereas the subordinate high-Ti basalts are distributed in both the upper sections of the western part, and uniformly in the eastern part of the ELIP [Xu et al, 2001;Xiao et al, 2004].…”

Reply to comment on ‘Paleokarst on the top of the Maokou Formation: further evidence for domal crustal uplift prior to the Emeishan flood volcanism’ by Bin He, Yi-Gang Xu, Jun-Peng Guan & Yu-Ting Zhong, Lithos 119 1–9, 2010

“…The origin and implications of mafic hydromagmatic deposits in the Daqiao section is not as clear as claimed by Ukstins Peate and Bryan (2008). The origins of lapilli are very complex and may be formed in several ways (Schumacher and Schmincke, 1995).…”

Igneous Rock Associations 16. The Late Permian Emeishan Large Igneous Province

“…alternative ideas have been presented (Utskins Peate and Bryan 2008;Sun et al 2010;Ali et al 2010;Wang et al 2014). The evidence against uplift is twofold: 1) carbonate platform collapse is documented with deep water facies such as radiolarian chert and submarine fans (Sun et al 2010;Ali et al 2010;Wang et al 2014), and 2) that the flood basalts were emplaced at sealevel (i.e.…”

“…The evidence against uplift is twofold: 1) carbonate platform collapse is documented with deep water facies such as radiolarian chert and submarine fans (Sun et al 2010;Ali et al 2010;Wang et al 2014), and 2) that the flood basalts were emplaced at sealevel (i.e. pillow basalt erupted after subaerial basalt) and that previously interpreted alluvial fan sedimentary rocks are actually hydromagmatic deposits (Utskins Peate and Bryan 2008;Wang et al 2014). The core of the debate is focused on whether the geological evidence (i.e.…”

“…evidence for uplift) are giving way to new and alternative ideas. There are ongoing debates regarding the source of the flood basalts, the formation of the oxide-ore deposits and whether crustal doming occurred prior to volcanism (Xu et al 2001Song et al 2001;He et al 2003;Zhou et al 2005;Utskins Peate and Bryan 2008;Sun et al 2010;Zhong et al 2011, Shellnutt andJahn 2011;Kamenetsky et al 2012).…”