Glaciomarine sedimentation in epicontinental seas exemplified by the northern Barents Sea

Anders Elverhøi, Stephanie L. Pfirman, Anders Solheim, Bengt B. Larssen

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)225-250
Number of pages26
JournalMarine Geology
Volume85
Issue number2-4
DOIs
StatePublished - Jan 1989
Externally publishedYes

ASJC Scopus subject areas

  • Oceanography
  • Geology
  • Geochemistry and Petrology

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