A Siliceous Microfossil View of Middle Eocene Arctic Paleoenvironments
A Siliceous Microfossil View of Middle Eocene Arctic Paleoenvironments
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中始新世北极古环境的硅质微化石观
DOI:
10.1029/2007pa001485
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Suto I
中科院分区:
文献类型:
--
作者:
Stickley CE;Koç N;Brumsack H-J;Jordan RW;Suto I
Integrated Ocean Drilling Program (IODP) Expedition 302, “The Arctic Coring Expedition” (ACEX), unearthed the most significant find of Paleogene siliceous microfossils in nearly 2 decades. 100 m of early middle Eocene, organic‐rich, finely laminated sediments contain abundant marine and freshwater siliceous microfossils allowing intriguing insights into central Arctic paleoenvironments during the start of Cenozoic cooling. Largely endemic assemblages of marine diatoms and ebridians are preserved along with very high abundances of chrysophyte cysts, the endogenously formed resting stage of freshwater algae. An overall brackish environment is invoked, but variations in group dominance suggest episodic changes in salinity, stratification, and trophic status. With the backing of inorganic geochemistry we synthesize the sediment characteristics by hypothesizing an environmental model for the cooccurrence of these diverse siliceous microfossil groups. We also report on initial insights into the composition of some of the laminations, which may help explain the formation of this rich sediment archive.
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DOI:
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发表时间:
2004
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影响因子:
--
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:
1986
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影响因子:
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作者:
M. Talbot;G. Bate
通讯作者:
G. Bate
影响因子:
2.9
作者:
J. Smol
通讯作者:
J. Smol
DOI:
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发表时间:
1957
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影响因子:
--
作者:
T. Kanaya
通讯作者:
T. Kanaya
DOI:
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发表时间:
2003
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作者:
E. Radionova;V. N. Beniamovski;A. Iakovleva;N. G. Muzylöv;T. V. Oreshkina;E. Shcherbinina;G. E. Kozlova
通讯作者:
G. E. Kozlova