Geochemical factors controlling accumulation of major and trace elements in Greenland coastal and fjord sediments |
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Authors: | D H Loring G Asmund |
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Institution: | (1) Department of Fisheries and Oceans, Bedford Institute of Oceanography, P. O. Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada, CA;(2) Greenland Environmental Research Institute, Tagensvej 135, DK2200 Copenhagen, Denmark, DK |
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Abstract: | The major (Al, Ti, Ca, Mg, Fe, Mn, Si) and trace element (Cd, Cr, Cu, Hg, Li, Ni, Pb, V, Zn) concentrations in surficial
(<20 cm) sediments from fjords and open coastal waters around Greenland have been determined. Regionally, high concentrations
of Fe, Ti, Mg, Cr, Cu, Ni, and V occur in some west and east coast sediments, but they appear to be natural in origin, as
there is no indication of anthropogenic influence. Chemical partition indicates that most of the heavy metals are structurally
bound in various silicate, oxide, and sulfide minerals. These host minerals occur more or less equally in the coarse and fine
sediment fractions (material >63 μm and <63 μm) and have accumulated at the same rate as other detrital clastic material.
Provenance and glaciomarine deposition are the main factors controlling the abundance and distribution of the major and trace
elements. The chemical composition reflects the mineralogical differences in the provenance of glacial marine material deposited
by water and ice adjacent to Greenland. The main source of the sediments enriched in Ti, Fe, Mg, Cr, Cu, Ni, and V appears
to be material derived from the volcanic rocks of the Mesozoic-Tertiary Provinces of Greenland by glacial erosion.
Received: 26 June 1995 · Accepted: 11 August 1995 |
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Keywords: | Marine sediments Greenland Major elements Trace metals Geochemical factors |
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