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Nürnberg, Dirk; Levitan, Mikhail A; Pavlidis, Yury A; Shelekhova, E S (1995): Clay mineral distribution in surface sediments. PANGAEA, https://doi.org/10.1594/PANGAEA.51506, Supplement to: Nürnberg, D et al. (1995): Distribution of clay minerals in surface sediments from the eastern Barents and south-western Kara seas. Geologische Rundschau, 84(3), 665-682, https://doi.org/10.1007/BF00284528

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Abstract:
Surface samples from the eastern Barents and south-western Kara seas have been analysed for clay mineralogy. Transport paths, the role of regional sources and local bedrock outcrops and the influence of hydrodynamic and glacigenous processes for clay distribution on the shelves are discussed in relation to central Arctic Ocean deep sea and sea ice sediments. Franz Josef Land and Novaya Zemlya show significantly different clay mineral associations. Although smectite concentrations are fairly high, Franz Josef Land can be excluded as a source for central Arctic sea ice sediments, which are relatively rich in smectite. In the Kara Sea, smectite concentrations in coastal sediments surpass even the Franz Josef Land concentrations. The large cyclonic gyre in the eastern Barents Sea between Novaya Zemlya and Franz Josef Land, which serves as a mixing zone between Arctic and North Atlantic water, is apparently reflected within the smectite distribution pattern. With the exception of Franz Josef Land, the area of investigation is typically low in kaolinite. In particular, coastal areas and areas north of Novaya Zemlya, influenced by the inflow of Arctic waters, show the lowest kaolinite concentrations. A high kaolinite occurrence within the Nansen Basin is most probably related to Franz Josef Land and emphasizes the importance of long-range downslope transport of sediments across the continental slope. The surface water circulation pattern in close interaction with local outcrops onshore Novaya Zemlya and locally restricted occurrences within the eastern Barents Sea significantly alter the illite dispersal pattern. Illite concentrations are lowest around Franz Josef Land. Chlorite is generally low in the area of investigation. Submarine outcrops and important chlorite occurrences onshore Novaya Zemlya bias its distribution pattern.
Coverage:
Median Latitude: 74.389326 * Median Longitude: 55.818562 * South-bound Latitude: 69.296667 * West-bound Longitude: 33.546667 * North-bound Latitude: 81.118500 * East-bound Longitude: 68.166667
Date/Time Start: 1982-01-01T00:00:00 * Date/Time End: 1992-09-01T00:00:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 0.01 m
Event(s):
01091-1 (10911) * Latitude: 71.585000 * Longitude: 44.411667 * Date/Time: 1992-09-01T00:00:00 * Elevation: -85.0 m * Location: off Novaja Zemlya * Campaign: DZ-68 * Basis: Dalniye Zelentsy * Device: Giant box corer (GKG)
18081-1 (180811) * Latitude: 72.984667 * Longitude: 53.056333 * Date/Time: 1992-08-18T00:00:00 * Elevation: -28.0 m * Location: off Novaja Zemlya * Campaign: DZ-68 * Basis: Dalniye Zelentsy * Device: Giant box corer (GKG) * Comment: 0.048-0.178 µSv/h on land
18082-1 (180821) * Latitude: 73.599667 * Longitude: 52.274667 * Date/Time: 1992-08-18T00:00:00 * Elevation: -137.0 m * Location: off Novaja Zemlya * Campaign: DZ-68 * Basis: Dalniye Zelentsy * Device: Giant box corer (GKG)
Comment:
clay fraction from Dalnie Zelentsy samples (e.g. 180811-1) are <2 micron
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6SmectiteSme%Nürnberg, DirkX-ray diffraction TEXTUR, clay fraction
7IlliteIll%Nürnberg, DirkX-ray diffraction TEXTUR, clay fraction
8KaoliniteKln%Nürnberg, DirkX-ray diffraction TEXTUR, clay fraction
9ChloriteChl%Nürnberg, DirkX-ray diffraction TEXTUR, clay fraction
10Size fraction < 0.001 mm, clay<1 µm%Nürnberg, DirkGrain size, sieving/settling tube
Size:
540 data points

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