Intensive peatland wildfires during the Aptian-Albian oceanic anoxic event 1b:Evidence from borehole SK-2 in the Songliao Basin,NE China

作     者：Zhi-Hui Zhang Da-Wei Lü Tian-Tian Wang Dong-Zhao An Hai-Yan Liu Dong-Dong Wang Cheng-Shan Wang Zhi-Hui Zhang;Da-Wei Lü;Tian-Tian Wang;Dong-Zhao An;Hai-Yan Liu;Dong-Dong Wang;Cheng-Shan Wang

作者机构：Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary MineralsCollege of Earth Sciences and EngineeringShandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina Institute of Earth SciencesChina University of GeosciencesBeijing 100083China School of Earth Sciences and ResourcesChina University of GeosciencesBeijing 100083China Chinese Academy of Geological SciencesBeijing 100037China 

出 版 物：《Journal of Palaeogeography》 (古地理学报（英文版）)

年 卷 期：2022年第11卷第3期

页      面：448-467页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.42102127,42172117,41772096) the Natural Science Foundation of Shandong Province(Grant No.ZR2021QD087) the Chinese Postdoctoral Science Foundation(Grant No.2021M702019) the SDUST Research Fund,Shandong University of Science and Technology(Grant No.2018TDJH101) 

主　　题：Lower Cretaceous OAEs Peatland Wildfire Coals 

摘      要：The Cretaceous has been considered a“high-fireworld accompanied by widespread by-products of combustion in the rock *** mid-Cretaceous oceanic anoxic event 1b(OAE1b)is marked by one of the major perturbations in the global carbon cycle characterized by deposition of organic-rich sediments in both marine and terrestrial ***,our understanding is still limited on changes in wildfire activity during OAE1b ***,we carried out a comprehensive analysis,including organic carbon isotope(δ^(13)C_(org)),total organic carbon(TOC),coal petrology,trace elements,and pyrolytic polycyclic aromatic hydrocarbons(pyroPAHs),of coal seams of the middle Aptian to early Albian Shahezi Formation from borehole SK-2 in Songliao Basin,Northeast *** negativeδ^(13)C_(org) excursions in the Shahezi Formation can be corresponded with the 113/Jacob and Kilian sub-events of ***,the intensive peatland wildfires have been identified during the sub-event periods of OAE1b based on the co-occurrence of high abundance of charcoal and pyroPAHs at that *** addition,Sr/Ba,Sr/Cu and Sr/Rb ratios demonstrate that enhanced peatland wildfires were controlled by dryer climate conditions owing to episodic northward migration of arid zones in East Asia related with rising global temperature during the sub-events of *** climate-driven extensive wildfire activity in the mid-latitude terrestrial ecosystems can be a contributing factor for OAE1b through the increased flux of nutrients fuelling primary producers in the lake and marine environments and leading to more speculative anoxia to allow the deposition of organic-rich *** results provide essential understanding of the importance of wildfires in driving mechanism of oceanic anoxic events(OAEs)in Earth s history.