Mineralogical composition of the upper 300m of Hole 302-M0002A

During the Arctic Coring Expedition (ACEX), a 428-m-thick sequence of Upper Cretaceous to Quaternary sediments was penetrated. The mineralogical composition of the upper 300 m of this sequence is presented here for the first time. Heavy and clay mineral associations indicate a major and consistent shift in provenance, from the Barents-Kara - western Laptev Sea region, characterized by presence of common clinopyroxene, to the eastern Laptev-East Siberian seas in the upper part of the section, characterized by common hornblende (amphibole). Sea ice originating from the latter source region must have survived at least one summer melt cycle in order to reach the ACEX drill site, if considering modern sea ice trajectories and velocities. This shift in mineral assemblages probably represents the onset of a perennial sea ice cover in the Arctic Ocean, which occurred at about 13 Ma, thus suggesting a coeval freeze in the Arctic and Antarctic regions.

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Cite this as

Krylov, Alexey A, Andreeva, Irina A, Vogt, Christoph, Backman, Jan, Krupskaya, Viktoria V, Grikurov, Garrik E, Moran, Kathryn, Shoji, Hitoshi (2008). Dataset: Mineralogical composition of the upper 300m of Hole 302-M0002A. https://doi.org/10.1594/PANGAEA.707428

DOI retrieved: 2008

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.707428
Author Krylov, Alexey A
Given Name Alexey A
Family Name Krylov
More Authors
Andreeva, Irina A
Vogt, Christoph
Backman, Jan
Krupskaya, Viktoria V
Grikurov, Garrik E
Moran, Kathryn
Shoji, Hitoshi
Source Creation 2008
Publication Year 2008
Resource Type application/zip - filename: Krylov_2008
Subject Areas
Name: Lithosphere

Name: Oceans

Name: Paleontology

Related Identifiers
Title: A shift in heavy and clay mineral provenance indicates a middle Miocene onset of a perennial sea ice cover in the Arctic Ocean
Identifier: https://doi.org/10.1029/2007PA001497
Type: DOI
Relation: IsSupplementTo
Year: 2008
Source: Paleoceanography
Authors: Krylov Alexey A , Andreeva Irina A , Vogt Christoph , Backman Jan , Krupskaya Viktoria V , Grikurov Garrik E , Moran Kathryn , Shoji Hitoshi .