Glaciomarine sedimentation in epicontinental seas exemplified by the northern Barents Sea.

Elverhøi, Anders, Pfirman, Stephanie L., Solheim, Anders and Larssen, Bengt B. (1989) Glaciomarine sedimentation in epicontinental seas exemplified by the northern Barents Sea. Marine Geology, 85 (2-4). pp. 225-250. DOI 10.1016/0025-3227(89)90155-2.

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Abstract

Sediments on high Arctic shelves result from modern processes and the effect of former glaciations. Based on data from the northern Barents Sea, an area with input from large and numerous surging glaciers, we define two principal zones with different environmental regimes and corresponding sedimentary facies: (1) a glacier-proximal zone influenced by grounding-line processes and the immediately adjacent areas affected by glacial sediment input, and (2) a glacier-distal, sea-ice and current-controlled zone, which also includes a wide sediment-starved region dominated by biogenic carbonate accumulation.

Characteristic of the glacier-proximal zone are glacial surges which affect sedimentation rates and leave a diagnostic pattern of sea-floor morphologies. Extensive ice gouging causes a homogeneous sediment texture.

In the glacier-distal zone, fine-grained mud supplied from sea ice and infrequent coarser material deposited from icebergs is reworked by modern oceanographic processes. On shallow banks, in 30–50 m of water, carbonates accumulate from a prolific bottom fauna formed in response to extensive reworking and nutrient supply.

Document Type: Article
Keywords: Glaciomarine sedimentation, epicontinental seas, Northern Barents Sea
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/0025-3227(89)90155-2
ISSN: 0025-3227
Date Deposited: 02 Mar 2018 13:11
Last Modified: 02 Mar 2018 13:11
URI: http://oceanrep.geomar.de/id/eprint/42115

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