文献类型：期刊文献

英文题名：Weathering of the Emeishan Large Igneous Province Enhanced the Nutrient Flux to the Oceans and Led to Late Permian Climate Cooling

作者：Ling, Kunyue Wen, Hanjie Gong, Shengtao Chen, Ce Du, Shengjiang Yin, Runsheng

第一作者：Ling, Kunyue

通信作者：Ling, KY[1];Wen, HJ[2];Wen, HJ[3]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang, Peoples R China;[2]Changan Univ, Sch Earth Sci & Resources, Xian, Peoples R China;[3]Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China;[4]East China Univ Technol, Sch Earth Sci, Nanchang, Peoples R China;[5]Guizhou Inst Technol, Sch Min Engn, Guiyang, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Inst Geochem, State Key Lab Crit Mineral Res & Explorat, Guiyang, Peoples R China;corresponding author), Changan Univ, Sch Earth Sci & Resources, Xian, Peoples R China;corresponding author), Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China.

年份：2026

卷号：27

期号：4

外文期刊名：GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS

收录：;EI(收录号：20261520498882);Scopus(收录号：2-s2.0-105035474852);WOS:【SCI-EXPANDED(收录号:WOS:001737137900001)】；

基金：This work was supported by the National Key Research and Development Program of China (Grant 2022YFC2903402), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant XDA0430103), the National Natural Science Foundation of China (Grants U2544207 and 42562018), the Guizhou Provincial Basic Research Program (Natural Science) (Grant QKHJC MS [2025] 184), and the Guizhou Science and Technology Innovation Talent Team Project (Grant CXTD[2023]008). We thank Christopher R. Fielding, Hengye Wei and two anonymous reviewers for providing constructive comments.

语种：英文

外文关键词：late Permian; Emeishan large igneous province; weathering; terrestrial nutrients; climate cooling

摘要：Mafic continental large igneous provinces (LIPs) erupted rapidly and may have overwhelmed Earth's atmospheric and biospheric systems. However, the exact balance and interplay between short-term climate warming caused by CO2 emissions and long-term cooling due to LIP weathering remains poorly understood. To investigate the influence of LIP emplacement on long-term climate change, we quantified the mass fluxes during the late Permian associated with the Emeishan LIP and its weathering products in the western Yangtze Cratonic Basin of southwestern China. The minimum value of the average denudation rate of the Emeishan LIP during the late Permian (Wuchiapingian) was 170.8 t/km2/yr, indicating enhanced capacity for atmospheric CO2 consumption at that time. The estimated minimum dissolved element fluxes from the Emeishan LIP to the surface ocean were 2.29 & times; 106 t/yr Si, 11.7 & times; 103 t/yr P, and 68 & times; 103 t/yr Fe, which account for 1.3%-3.4% of the fluxes from modern global rivers. These high nutrient fluxes led to an atmospheric CO2 removal rate of 8.5-85 & times; 106 t/yr through enhanced biological productivity, as estimated by the Fe fertilization model and dissolved Fe flux. This rate is approximately one order of magnitude higher than those resulting from Emeishan LIP basalt weathering and accounts for 0.05%-0.5% of the modern global CO2 sink, which could have led to a reduction in atmospheric CO2. Our results highlight the key role of LIPs in modulating Earth's climate over long time periods and in driving long-term cooling due to enhanced CO2 drawdown caused by enhanced nutrient input to the surface ocean.