Correlation of sub-centennial-scale pulses of initial Central Atlantic Magmatic Province lavas and the end-Triassic extinctions

• 成果类型: Article
• 署名作者: Kent, Dennis V.; Olsen, Paul E.; Wang, Huapei; Schaller, Morgan F.; Et-Touhami, Mohammed
• 署名单位: Columbia University; Rutgers University System; Rutgers University New Brunswick; China University of Geosciences; Rensselaer Polytechnic Institute; Mohammed First University of Oujda
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14134
• DOI: 10.1073/pnas.2415486121
• 发表日期: 2024-11-12
• 关键词: large igneous provinces; u-pb geochronology; lowermost jurassic succession; northern calcareous alps; newark rift basin; st-audries bay; mass extinction; volcanic-eruptions; mountain basalt; western-europe

摘要

The end-Triassic extinction (ETE) on land was synchronous with the initial lavas of the Central Atlantic Magmatic Province (CAMP) and occurred just after the brief 26 thousand year (kyr) reverse geomagnetic polarity Chron E23r that can be used for global correlation. Lava-by-lava paleomagnetic secular variation data, previously reported from Morocco and northeastern United States combined with our data for the North Mountain Basalt from the Fundy Basin of Canada show that the initial phase of CAMP volcanism occurred in only five directional groups or pulses each occupying less than a century. The first four directional groups occur during a similar to 40 kyr period based on available astrochronology and U-Pb geochronology. The coincidence of the initial major pulse of CAMP volcanism with the ETE points to short-lived volcanic winters albedo-induced by sulfate aerosols as a plausible key agent of the extinctions in the tropical continental realm, whereas looser correlations allow prolonged CO2 emissions to contribute to more long-ranging effects in the marine realm via ocean acidification and longer-term warming.