Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302)

Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302)
复制标题

北极晚古新世 - 早始新世古环境,特别强调古新世 - 始新世热最大值(罗蒙诺索夫海岭,综合海洋钻探计划远征 302)

DOI:
10.1029/2007pa001495
复制
发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Brinkhuis H
Brinkhuis H
中科院分区:
地学2区
文献类型:
--
作者:
Sluijs A;Röhl U;Schouten S;Brumsack H-J;Sangiorgi F;Sinninghe Damsté J;Brinkhuis H

文献摘要

参考文献

被引文献

相似文献

我们重建了北冰洋最新的古新世和始新世早期(1057 -50 Ma)的环境趋势,并专注于古新世-始新世热最大值(PETM)(1055 Ma),使用综合大洋钻探计划远征302从罗蒙诺索夫海岭恢复的地层。罗蒙诺索夫海岭在古新世晚期和始新世早期仍有一部分是陆上的,并在始新世早期逐渐下沉。有机甲藻孢囊(dinocyst)组合点半咸水和生产表面沃茨在整个最新的古新世和始新世早期。在这段时间内,甲藻藻组合是世界性的,这表明环境温暖,这一点得到了TEX 86 ′重建的15°-18 ° C温度的证实。无机地球化学一般反映了沉积物中的还原条件和始新世上、下段的富氧条件。光谱分析显示,在始新世热峰2附近(约53 Ma,由恐龙囊地层学证实)的X射线荧光扫描Fe数据中记录的旋回性与岁差有关。在PETM的下部,代理记录表明,随着海平面的上升,风化、径流、缺氧和生产力沿着增强。根据总有机碳含量和沉积物累积速率的变化,在北冰洋的过量有机碳埋藏似乎对PETM期间注入的碳的封存做出了重大贡献。
We reconstruct the latest Paleocene and early Eocene (∼57–50 Ma) environmental trends in the Arctic Ocean and focus on the Paleocene‐Eocene thermal maximum (PETM) (∼55 Ma), using strata recovered from the Lomonosov Ridge by the Integrated Ocean Drilling Program Expedition 302. The Lomonosov Ridge was still partially subaerial during the latest Paleocene and earliest Eocene and gradually subsided during the early Eocene. Organic dinoflagellate cyst (dinocyst) assemblages point to brackish and productive surface waters throughout the latest Paleocene and early Eocene. Dinocyst assemblages are cosmopolitan during this time interval, suggesting warm conditions, which is corroborated by TEX86′‐reconstructed temperatures of 15°–18°C. Inorganic geochemistry generally reflects reducing conditions within the sediment and euxinic conditions during the upper lower Eocene. Spectral analysis reveals that the cyclicity, recorded in X‐ray fluorescence scanning Fe data from close to Eocene thermal maximum 2 (∼53 Ma, presence confirmed by dinocyst stratigraphy), is related to precession. Within the lower part of the PETM, proxy records indicate enhanced weathering, runoff, anoxia, and productivity along with sea level rise. On the basis of total organic carbon content and variations in sediment accumulation rates, excess organic carbon burial in the Arctic Ocean appears to have contributed significantly to the sequestration of injected carbon during the PETM.
DOI: --
发表时间: 2004
期刊:
影响因子: --
作者:
J. Eldrett;I. Harding;J. Firth;A. Roberts
通讯作者: A. Roberts
比利时北部泻湖古新世-始新世边界环境中的孢粉学、古环境和有机碳同位素演化
DOI: --
发表时间: 2003
期刊:
影响因子: --
作者:
É. Steurbaut;Roberto Magioncalda;C. Dupuis;S. V. Simaeys;E. Roche;M. Roche
通讯作者: M. Roche
南极海域新生代深海底栖有孔虫动物群的发育
DOI: 10.1144/gsl.sp.1989.047.01.21
发表时间: 1989
期刊: Geological Society, London, Special Publications
影响因子: --
作者:
Ellen Thomas
通讯作者: Ellen Thomas
北冰洋的轨道尺度变化和时间尺度
DOI: 10.1029/2007pa001490
发表时间: 2008
期刊: Paleoceanography
影响因子: --
作者:
Pälike H
通讯作者: Pälike H
Anthering 露头(奥地利),是古新世/始新世边界附近特提斯洋与西北欧之间关联的关键部分
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
C. Heilmann;H. Egger
通讯作者: H. Egger