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Terrigenous sedimentation processes along the continental margin off NW Africa: implications from grain-size analysis of seabed sediments.
- Source :
-
Sedimentology . Oct2004, Vol. 51 Issue 5, p1145-1154. 10p. - Publication Year :
- 2004
-
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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00370746
- Volume :
- 51
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Sedimentology
- Publication Type :
- Academic Journal
- Accession number :
- 14454248
- Full Text :
- https://doi.org/10.1111/j.1365-3091.2004.00665.x