Mass extinction was commonly considered as the response to interaction between geosystems, and volcanism can be viewed as a vital link between the surface systems and deep geodynamic processes. This causative link between end-Guadalupian mass extinction and volcanism has been clarified, based on the research of bauxite and pyrite deposits in the Youjiang Basin, South China Block (SCB). Geochronological and geochemical evidences show that the source materials of bauxite-pyrite deposits were mainly derived from the Emeishan large igneous province (LIP) to the northwest and the continental arc along the SW margin of SCB associated with the subduction of the Paleo-Tethys Ocean underneath the Indochina block. Volcanic ash fallout by atmospheric dispersal driven by the easterly trade winds could best account for the spatial variation of both bauxite and pyrite deposits given their relative paleogeographic positions with respect to the two flanking sources. Massive volcanic tephra from arc volcanism fell on exposed carbonate platforms, underwent intensive chemical weathering and transformed into bauxites under the warm and humid tropical climate in Tethys, which could be also favored by acid precipitation caused by volcanic degassing. Extensive SO₂ released from Emeishan LIP emission could be the major source of pyrite ores, probably with minor contribution from arc volcanism. This indicates that the prolonged and extensive continental arc volcanism induced environmental stress in the poorly-ventilated Paleo-Tethys Ocean, while the coincidental eruption of the large igneous provinces was the final straw, leading to the dramatic biotic crises during the Middle-Late Permian interval.

普遍认为灭绝是对地球系统之间相互作用的反应，而火山作用可以看作是地表系统与深层地球动力学过程之间的重要纽带。基于对华南地块右江盆地铝土矿和黄铁矿矿床的研究，瓜达卢普末块灭绝与火山活动之间的这种因果关系已得到阐明。地质年代学和地球化学证据表明，铝土矿-黄铁矿矿床的原料主要来自峨眉山大火成岩省（LIP），其西北缘和沿SCB西南缘的大陆弧与古特提斯海底俯冲有关。印度支那街区。考虑到相对于两个侧缘源的相对古地理位置，由东风带动的大气扩散引起的火山灰沉降可以最好地解释铝土矿和黄铁矿矿床的空间变化。在特提斯，在温暖湿润的热带气候下，弧形火山活动产生的大量火山特非拉陨石落在裸露的碳酸盐台地上，经历了强烈的化学风化并转变为铝土矿，火山脱气引起的酸沉降也可能会助长这种作用。广泛的SO 火山脱气引起的酸沉淀也可能有利于此。广泛的SO 火山脱气引起的酸沉淀也可能有利于此。广泛的SO峨眉山LIP排放中释放的₂可能是黄铁矿的主要来源，可能是弧火山作用的一小部分。这表明长期和广泛的大陆弧火山活动在通风不良的古特提斯海洋中引起了环境压力，而火成大省的同时爆发是最终的稻草，导致了中后期二叠纪间期的剧烈生物危机。 。