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Holz, Christine; Stuut, Jan-Berend W; Henrich, Rüdiger (2004): Grain-size analysis of surface sediments, continental margin off NW Africa. PANGAEA, https://doi.org/10.1594/PANGAEA.207974, Supplement to: Holz, C et al. (2004): Terrigenous sedimentation processes along the continental margin off NW-Africa: implications from grain-size analysis of surface sediments. Sedimentology, 51, 1145-1154, https://doi.org/10.1111/j.1365-3091.2004.00665.x

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Abstract:
The terrigenous fraction of seabed sediments recovered along the north-west African continental margin illustrates spatial variability in grain size attributed to different transport mechanisms. Three subpopulations are determined from the grain-size analyses (n = 78) of the carbonate-free silt fraction applying an end-member modelling algorithm (G. J. Weltje, 1997). The two coarsest end-members are interpreted as representing aeolian dust, and the fine-grained end-member is related to fluvial supply. The end-member model thus allows aeolian fallout to be distinguished from fluvial-sourced mud in this area. The relative contributions of the end-members show distinct regional variations that can be related to different transport processes and pathways. Understanding present-day sediment dispersal and mixing is important for a better understanding of older sedimentary records and palaeoclimate reconstructions in the region.
Related to:
Holz, Christine (2005): Climate-induced variability of fluvial and aeolian sediment supply and gravity-driven sediment transport off Northwest Africa. PhD Thesis, Elektronische Dissertationen an der Staats- und Universitätsbibliothek Bremen, Germany, urn:nbn:de:gbv:46-diss000012051
Coverage:
Median Latitude: 26.850711 * Median Longitude: -14.523492 * South-bound Latitude: 17.195000 * West-bound Longitude: -18.261700 * North-bound Latitude: 33.298300 * East-bound Longitude: -9.390000
Date/Time Start: 1982-01-22T00:00:00 * Date/Time End: 2001-04-12T11:11:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
GeoB4024-3 * Latitude: 27.678333 * Longitude: -13.431667 * Date/Time: 1996-02-04T00:00:00 * Elevation: -95.0 m * Recovery: 0.31 m * Campaign: VH96/1-3 * Basis: Victor Hensen * Method/Device: Giant box corer (GKG)
GeoB4025-2 * Latitude: 27.748333 * Longitude: -13.488333 * Date/Time: 1996-02-04T00:00:00 * Elevation: -504.0 m * Campaign: VH96/1-3 * Basis: Victor Hensen * Method/Device: Giant box corer (GKG) * Comment: no sample
GeoB4026-1 * Latitude: 27.808333 * Longitude: -13.543333 * Date/Time: 1996-02-04T00:00:00 * Elevation: -990.0 m * Recovery: 0.28 m * Campaign: VH96/1-3 * Basis: Victor Hensen * Method/Device: Giant box corer (GKG)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6SandSand%Holz, ChristineGrain size, sieving
7SiltSilt%Holz, ChristineAtterberg settling tubes
8Size fraction < 0.002 mm, > 9 phi, clay<2 µm, >9 phi%Holz, ChristineAtterberg settling tubes
9End memberEM%Holz, ChristineCalculatedEM1
10End memberEM%Holz, ChristineCalculatedEM2
11End memberEM%Holz, ChristineCalculatedEM3
Size:
519 data points

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