Environmental effects of large igneous province magmatism: a Siberian perspective

Abstract

This is the fifteenth in a series of evaluated sets of rate constants and photochemical cross sections compiled by the NASA Panel for Data Evaluation.The data are used primarily to model stratospheric and upper tropospheric processes, with particular emphasis on the ozone layer and its possible perturbation by anthropogenic and natural phenomena.

The onset of flood volcanism in the north-western part of the Siberian Traps: Explosive volcanism versus effusive lava flows

“…b) Core proportion vs flow thickness in lava sequences show an increase in the core proportion as the lava flows thickens (adapted from Nelson et al, 2009), with zones marked where compound braided facies and where tabular facies commonly occur. atmospheric ozone depletion (Visscher et al, 2004;Beerling et al, 2007;Svensen et al, 2009a;Black et al, 2014Black et al, , 2015. Heating of petroleumbearing evaporites is suggested to have generated ozone-reactive halocarbons (Svensen et al, 2009a).…”

Siberian Traps volcaniclastic rocks and the role of magma-water interactions

“…Because CO 2 is relatively inert in the atmosphere, the eruptive style and altitude of injection do not determine the environmental effects of volcanic CO 2 emissions (e.g., Wignall, 2001). However, if the volcaniclastic rocks promoted rapid weathering, they may have expedited drawdown of atmospheric CO 2 (Dessert et al, 2001(Dessert et al, , 2003Black et al, 2015). Furthermore, Meyer et al (2011) have argued that high productivity in the surface ocean delayed benthic recovery from the end-Permian mass extinction.…”

Hyperthermal-driven anoxia and reduced productivity in the aftermath of the Permian-Triassic mass extinction: a case study from Western Canada

“…The Permian-Triassic mass extinction (PTME) was the most devastating biotic crisis in Earth history (Raup, 1979;Erwin, 1993;Alroy et al, 2008), both on land (Sahney and Benton, 2008) and in the oceans (Stanley, 2016;Fan et al, 2020). The extinction was driven by the eruption of the Siberian Traps (e.g., Renne et al, 1995;Wignall, 2001;Rampino et al, 2017;Green et al, 2022), which input tremendous amounts of CO 2 into the atmosphere (e.g., Kidder and Worsley, 2010;Black et al, 2015;Sobolev et al, 2015;Burgess et al, 2017;Joachimski et al, 2022;Tian and Buck, 2022), leading to a runaway greenhouse effect that made life in shallow tropical seas untenable for many organisms (Sun et al, 2012;Romano et al, 2013;Song et al, 2014). Global hothouse conditions led to sluggish oceanic circulation (Kidder and Worsley, 2004;Kiehl and Shields, 2005;Kiehl and Shields, 2010) and the depletion of oxygen in the deep ocean (Isozaki, 1997;Grasby et al, 2013;Grasby et al, 2021;Takahashi et al, 2021), as well as the impingement of anoxic water masses onto the continental shelves (e.g., Wignall and Hallam, 1992;Thomas et al, 2004;Algeo et al, 2007;Galfetti et al, 2008;Grasby and Beauchamp, 2009;Liao et al, 2010;Metcalfe et al, 2013;Pietsch et al, 2014;Lau et al, 2016;Xiao et al, 2018).…”