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)
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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
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Brinkhuis H
中科院分区:
文献类型:
--
作者:
Sluijs A;Röhl U;Schouten S;Brumsack H-J;Sangiorgi F;Sinninghe Damsté J;Brinkhuis H
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.
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DOI:
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发表时间:
2004
期刊:
影响因子:
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作者:
J. Eldrett;I. Harding;J. Firth;A. Roberts
通讯作者:
A. Roberts
DOI:
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发表时间:
2003
期刊:
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作者:
É. Steurbaut;Roberto Magioncalda;C. Dupuis;S. V. Simaeys;E. Roche;M. Roche
通讯作者:
M. Roche
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:
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作者:
Ellen Thomas
通讯作者:
Ellen Thomas
影响因子:
--
作者:
Pälike H
通讯作者:
Pälike H
DOI:
--
发表时间:
2000
期刊:
影响因子:
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作者:
C. Heilmann;H. Egger
通讯作者:
H. Egger