Bulk components and ice rafted debris of five sediment cores of the Sophia Basin, Arctic Ocean

Periods of enhanced terrigenous input to the ocean's basins of the North Atlantic have been reported for the last glacial period. We present a set of new sediment cores recovered from the Sophia Basin north of Svalbard which exhibit wide spread IRD layers reflecting enhanced terrigenous input t...

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Bibliographic Details
Main Authors: Winkelmann, Daniel, Schäfer, Christoph J, Stein, Ruediger, Mackensen, Andreas
Format: Dataset
Language:English
Published: PANGAEA 2008
Subjects:
ARK-XX/3
AWI_Paleo
Fram Strait
GC
Gravity corer
KAL
Kasten corer
Paleoenvironmental Reconstructions from Marine Sediments @ AWI
Polarstern
PS66
PS66/306-2
PS66/308-3
PS66/309-1
PS66/311-3
PS66/329-3
Arctic
Arctic Ocean
Svalbard
Iceberg*
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.695687
https://doi.org/10.1594/PANGAEA.695687
Description
Summary:Periods of enhanced terrigenous input to the ocean's basins of the North Atlantic have been reported for the last glacial period. We present a set of new sediment cores recovered from the Sophia Basin north of Svalbard which exhibit wide spread IRD layers reflecting enhanced terrigenous input throughout the last ~200 kyr. BP. Their consistent stratigraphic position, sedimentological character, high sedimentation rate and geochemical characteristic point to synchronously deposited layers which we name terrigenous input events (TIEs). Due to their higher densities, they generate excellent reflectors for sediment penetrating acoustic devices and prominent acoustic layers in the imagery of sedimentary structures. Therefore TIEs can be used for regional acoustic stratigraphy. Each of the events can be linked to major glacial activity on Svalbard. However, the Early Weichselian glaciation is not recorded as a TIE and, in agreement with other work, might not have occurred on Svalbard as a major glacial advance to the shelf break. Non-synchronous timing of western and northern sources on Svalbard points against sea-level induced iceberg discharge events.

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