Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A ...
In 2004, Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition, ACEX) to the Lomonosov Ridge drilled the first Central Arctic Ocean sediment record reaching the uppermost Cretaceous (~430 m composite depth). While the Neogene part of the record is characterized by grayish-yellow...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2011
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.786428 https://doi.pangaea.de/10.1594/PANGAEA.786428 |
| Summary: | In 2004, Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition, ACEX) to the Lomonosov Ridge drilled the first Central Arctic Ocean sediment record reaching the uppermost Cretaceous (~430 m composite depth). While the Neogene part of the record is characterized by grayish-yellowish siliciclastic material, the Paleogene part is dominated by biosiliceous black shale-type sediments. The lithological transition between Paleogene and Neogene deposits was initially interpreted as a single sedimentological unconformity (hiatus) of ~26 Ma duration, separating Eocene from Miocene strata. More recently, however, continuous sedimentation on Lomonosov Ridge throughout the Cenozoic was proclaimed, questioning the existence of a hiatus. In this context, we studied the elemental and mineralogical sediment composition around the Paleogene-Neogene transition at high resolution to reconstruct variations in the depositional regime (e.g. wave/current activity, detrital provenance, and bottom water redox ... : Supplement to: März, Christian; Vogt, Christoph; Schnetger, Bernhard; Brumsack, Hans-Jürgen (2011): Variable Eocene-Miocene sedimentation processes and bottom water redox conditions in the Central Arctic Ocean (IODP Expeditrion 302). Earth and Planetary Science Letters, 310(3-4), 526-537 ... |
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