{"title":"中国蓬莱滩瓜岛-珞巴(二叠纪)边界锑同位素和有毒金属的变化:峨眉山火山活动和海洋大灭绝的影响","authors":"","doi":"10.1016/j.epsl.2024.119096","DOIUrl":null,"url":null,"abstract":"<div><div>The Guadalupian-Lopingian (G-L) extinction event during the Permian stands a major diversity decline. The Emeishan Large Igneous Province (ELIP) has long been posited as the principal trigger, but direct geochemical evidence establishing a connection between these events has remained elusive. Here, we present antimony (Sb) concentration and isotope (δ<sup>123</sup>Sb) analyses conducted across the G-L boundary at Penglaitan, South China. Our investigation reveals a large spike in Sb concentration concurrent with a significant decline in δ<sup>123</sup>Sb values spanning the G-L boundary. The δ<sup>123</sup>Sb values range from −0.49‰ to +0.48‰ with the lightest values occurring at the main extinction horizon of marine benthos. Other toxic metals (As, Hg, Pb, etc.) are enriched in the same horizons and are likely of volcanic origin. Our estimates based on mass balance calculations indicate that the ELIP increased oceanic toxic metal loading by an order of magnitude. Their toxic effects may have contributed to stressed regional marine environment and biodiversity loss in South China during the G-L transition.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Variations in antimony isotope and toxic metals across the Guadalupian-Lopingian (Permian) boundary at Penglaitan, China: Implications for the Emeishan volcanism and marine extinction\",\"authors\":\"\",\"doi\":\"10.1016/j.epsl.2024.119096\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The Guadalupian-Lopingian (G-L) extinction event during the Permian stands a major diversity decline. The Emeishan Large Igneous Province (ELIP) has long been posited as the principal trigger, but direct geochemical evidence establishing a connection between these events has remained elusive. Here, we present antimony (Sb) concentration and isotope (δ<sup>123</sup>Sb) analyses conducted across the G-L boundary at Penglaitan, South China. Our investigation reveals a large spike in Sb concentration concurrent with a significant decline in δ<sup>123</sup>Sb values spanning the G-L boundary. The δ<sup>123</sup>Sb values range from −0.49‰ to +0.48‰ with the lightest values occurring at the main extinction horizon of marine benthos. Other toxic metals (As, Hg, Pb, etc.) are enriched in the same horizons and are likely of volcanic origin. Our estimates based on mass balance calculations indicate that the ELIP increased oceanic toxic metal loading by an order of magnitude. Their toxic effects may have contributed to stressed regional marine environment and biodiversity loss in South China during the G-L transition.</div></div>\",\"PeriodicalId\":11481,\"journal\":{\"name\":\"Earth and Planetary Science Letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-11-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Earth and Planetary Science Letters\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0012821X24005284\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Earth and Planetary Science Letters","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0012821X24005284","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Variations in antimony isotope and toxic metals across the Guadalupian-Lopingian (Permian) boundary at Penglaitan, China: Implications for the Emeishan volcanism and marine extinction
The Guadalupian-Lopingian (G-L) extinction event during the Permian stands a major diversity decline. The Emeishan Large Igneous Province (ELIP) has long been posited as the principal trigger, but direct geochemical evidence establishing a connection between these events has remained elusive. Here, we present antimony (Sb) concentration and isotope (δ123Sb) analyses conducted across the G-L boundary at Penglaitan, South China. Our investigation reveals a large spike in Sb concentration concurrent with a significant decline in δ123Sb values spanning the G-L boundary. The δ123Sb values range from −0.49‰ to +0.48‰ with the lightest values occurring at the main extinction horizon of marine benthos. Other toxic metals (As, Hg, Pb, etc.) are enriched in the same horizons and are likely of volcanic origin. Our estimates based on mass balance calculations indicate that the ELIP increased oceanic toxic metal loading by an order of magnitude. Their toxic effects may have contributed to stressed regional marine environment and biodiversity loss in South China during the G-L transition.
期刊介绍:
Earth and Planetary Science Letters (EPSL) is a leading journal for researchers across the entire Earth and planetary sciences community. It publishes concise, exciting, high-impact articles ("Letters") of broad interest. Its focus is on physical and chemical processes, the evolution and general properties of the Earth and planets - from their deep interiors to their atmospheres. EPSL also includes a Frontiers section, featuring invited high-profile synthesis articles by leading experts on timely topics to bring cutting-edge research to the wider community.