(Table 1) Clay and non-clay mineral composition of dirty ice samples from across the Arctic ...

Extensive dirty ice patches with up to 7 kg/m**2 sediment concentrations in layers of up to 10 cm thickness were encountered in 2005 and 2007 in numerous areas across the central Arctic. The Fe grain fingerprint determination of sources for these sampled dirty ice floes indicated both Russian and Ca...

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Bibliographic Details
Main Authors: Darby, Dennis A, Myers, Wesley B, Jakobsson, Martin, Rigor, Ignatius
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Event label
Latitude of event
Longitude of event
Area/locality
Sample ID
Sample comment
DEPTH, ice/snow
Depth, bottom/max
Depth, top/min
Quartz
Microcline
Kalifeldspar
Sanidine
Orthoclase
Anorthoclase
Albite
Oligoclase
Andesine
Labradorite
Bytownite
Anorthite
Calcite
Dolomite
Amphibole
Pyroxene
Magnetite
Maghemite
Non-clay minerals
Kaolinite
Smectite
Illite
Biotite
Chlorite
Muscovite
Vermiculite
Difference
Ice measurement
LOMROG-I
Oden
Kara Sea
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.808630
https://doi.pangaea.de/10.1594/PANGAEA.808630
Description
Summary:Extensive dirty ice patches with up to 7 kg/m**2 sediment concentrations in layers of up to 10 cm thickness were encountered in 2005 and 2007 in numerous areas across the central Arctic. The Fe grain fingerprint determination of sources for these sampled dirty ice floes indicated both Russian and Canadian sources, with the latter dominating. The presence of benthic shells and sea weeds along with thick layers (2-10 cm) of sediment covering 5-10 m2 indicates an anchor ice entrainment origin as opposed to suspension freezing for some of these floes. The anchor ice origin might explain the dominance of Canadian sources where only narrow flaw leads occur that would not favor suspension freezing as an entrainment process. Expandable clays, commonly used as an indicator of a Kara Sea origin for dirty sea ice, are present in moderately high percentages (>20%) in many circum-Arctic source areas, including the Arctic coasts of North America. Some differences between the Russian and the North American coastal areas ... : Positions are mostly approximate. ...

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