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Wahsner, Monika; Müller, Claudia; Stein, Ruediger; Ivanov, Gennadiy I; Levitan, Mikhail A; Shelekhova, E S; Tarasov, Gennadiy A (1999): Distribution of clay minerals in surface sediments of the Eurasian Arctic Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.57249, Supplement to: Wahsner, M et al. (1999): Clay-mineral distribution in surface sediments of the Eurasian Arctic Ocean and continental margin as indicator for source areas and transport pathways - a synthesis. Boreas, 28(1), 215-233, https://doi.org/10.1111/j.1502-3885.1999.tb00216.x

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Abstract:
Clay-mineral distributions in the Arctic Ocean and the adjacent Eurasian shelf areas are discussed to identify source areas and transport pathways of terrigenous material in the Arctic Ocean. The main clay minerals in Eurasian Arctic Ocean sediments are illite and chlorite. Smectite and kaolinite occur in minor amounts in these sediments, but show strong variations in the shelf areas. These two minerals are therefore reliable in reconstructions of source areas of sediments from the Eurasian Arctic. The Kara Sea and the western part of the Laptev Sea are enriched in smectite, with highest values of up to 70% in the deltas of the Ob and Yenisey rivers. Illite is the dominant clay mineral in all the investigated sediments except for parts of the Kara Sea. The highest concentrations with more than 70% illite occur in the East Siberian Sea and around Svalbard. Chlorite represents the clay mineral with lowest concentration changes in the Eastern Arctic, ranging between 10 and 25%. The main source areas for kaolinite in the Eurasian Arctic are Mesozoic sedimentary rocks on Franz-Josef Land islands. Based on clay-mineral data, transport of the clay fraction via sea ice is of minor importance for the modern sedimentary budget in the Arctic basins.
Coverage:
Median Latitude: 79.023264 * Median Longitude: 92.931037 * South-bound Latitude: 63.367000 * West-bound Longitude: 0.165000 * North-bound Latitude: 90.000000 * East-bound Longitude: -6.766800
Date/Time Start: 1987-03-08T00:00:00 * Date/Time End: 1996-09-18T13:00:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
AG80/10-1 * Latitude: 80.623333 * Longitude: 67.051667 * Date/Time: 1994-08-16T00:00:00 * Elevation: -500.0 m * Location: Franz Joseph Land/St. Anna Trough * Campaign: AG80 * Basis: Akademik Golitsyn * Method/Device: van Veen Grab (VGRAB) * Comment: Biology
AG80/1-1 * Latitude: 79.788000 * Longitude: 60.892167 * Date/Time: 1995-08-13T00:00:00 * Elevation: -265.0 m * Location: Franz Joseph Land/St. Anna Trough * Campaign: AG80 * Basis: Akademik Golitsyn * Method/Device: van Veen Grab (VGRAB) * Comment: Biology
AG80/11-1 * Latitude: 80.371667 * Longitude: 55.871667 * Date/Time: 1994-08-18T00:00:00 * Elevation: -26.0 m * Location: Franz Joseph Land/St. Anna Trough * Campaign: AG80 * Basis: Akademik Golitsyn * Method/Device: van Veen Grab (VGRAB) * Comment: Biology
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1LATITUDELatitudeGeocode
2LONGITUDELongitudeGeocode
3Event labelEvent
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6SmectiteSme%Wahsner, MonikaX-ray diffraction TEXTUR, clay fraction
7IlliteIll%Wahsner, MonikaX-ray diffraction TEXTUR, clay fraction
8ChloriteChl%Wahsner, MonikaX-ray diffraction TEXTUR, clay fraction
9KaoliniteKln%Wahsner, MonikaX-ray diffraction TEXTUR, clay fraction
10Kaolinite/Chlorite ratioKln/ChlWahsner, MonikaCalculated
11Smectite/Illite ratioSmec/IllWahsner, MonikaCalculated
Size:
2010 data points

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