Grain-size analysis of surface sediments, continental margin off NW Africa


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.

Supplement to: Holz, Christine; Stuut, Jan-Berend W; Henrich, Rüdiger (2004): Terrigenous sedimentation processes along the continental margin off NW-Africa: implications from grain-size analysis of surface sediments. Sedimentology, 51, 1145-1154

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Metadata Access
Creator Holz, Christine; Stuut, Jan-Berend W ORCID logo; Henrich, Rüdiger
Publisher PANGAEA
Publication Year 2004
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 519 data points
Discipline Earth System Research
Spatial Coverage (-18.262W, 17.195S, -9.390E, 33.298N); Agadir Canyon; Atlantic Ocean
Temporal Coverage Begin 1982-01-22T00:00:00Z
Temporal Coverage End 2001-04-12T11:11:00Z