Grain-size analysis of surface sediments, continental margin off NW Africa
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2004
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| _version_ | 1867171455503958016 |
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| author | Holz, Christine Stuut, Jan-Berend W Henrich, Rüdiger |
| author_facet | Holz, Christine Stuut, Jan-Berend W Henrich, Rüdiger |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_207974 |
| institution | PANGAEA |
| language | en |
| publishDate | 2004 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Grain-size analysis of surface sediments, continental margin off NW Africa Holz, Christine Stuut, Jan-Berend W Henrich, Rüdiger 215; 216; 217; 220; 221; 222; 224; 225; 226; 227; 230; 231; 232; 233; 234; 235; 237; 238; Agadir Canyon; Atlantic Ocean; Atterberg settling tubes; Calculated; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Elevation of event; End member; Event label; GeoB4024-3; GeoB4025-2; GeoB4026-1; GeoB4029-2; GeoB4031-1; GeoB4038-2; GeoB4040-2; GeoB4057-2; GeoB4060-2; GeoB4210-2; GeoB4212-3; GeoB4213-1; GeoB4215-1; GeoB4216-2; GeoB4223-1; GeoB4225-3; GeoB4226-1; GeoB4228-1; GeoB4229-2; GeoB4230-1; GeoB4231-2; GeoB4232-1; GeoB4233-2; GeoB4235-1; GeoB4236-2; GeoB4237-1; GeoB4238-2; GeoB4239-1; GeoB5529-1; GeoB5531-1; GeoB5532-2; GeoB5533-1; GeoB5534-2; GeoB5535-1; GeoB5536-3; GeoB5537-2; GeoB5538-2; GeoB5539-2; GeoB5540-3; GeoB5541-2; GeoB5542-3; GeoB5546-3; GeoB5547-2; GeoB5548-3; GeoB5549-2; GeoB5550-3; GeoB5551-2; GeoB5553-2; GeoB5555-2; GeoB5556-3; GeoB5557-2; GeoB5558-2; GeoB5559-1; GeoB5560-2; GeoB5561-1; GeoB5565-3; GeoB5566-2; GeoB6005-1; GeoB6006-2; GeoB6007-1; GeoB6008-2; GeoB6009-1; GeoB6010-1; GeoB6011-2; GeoB7408-2; GeoB7409-1; GeoB7410-1; GeoB7413-2; GeoB7414-1; GeoB7415-1; GeoB7417-1; GeoB7418-1; GeoB7419-1; GeoB7420-1; GeoB7423-2; GeoB7424-1; GeoB7425-2; GeoB7426-1; GeoB7427-1; GeoB7428-1; GeoB7430-2; GeoB7431-1; Giant box corer; GIK16010-1; GIK16012-2; GIK16015-1; GIK16016-1; GIK16017-1; GIK16019-1; GIK16021-1; GIK16022-1; GIK16024-1; GIK16025-1; GIK16028-1; GIK16029-1; GIK16031-1; GIK16035-1; GKG; Grain size, sieving; Latitude of event; Longitude of event; M37/1; M42/4b; M45/5a; M60; MARUM; Meteor (1964); Meteor (1986); MUC; MultiCorer; POS272; Poseidon; Sand; Silt; Size fraction < 0.002 mm, clay; SUBTROPEX 82; van Veen Grab; VGRAB; VH96/1-3; VH96/1-4; Victor Hensen 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. |
| title | Grain-size analysis of surface sediments, continental margin off NW Africa |
| topic | 215; 216; 217; 220; 221; 222; 224; 225; 226; 227; 230; 231; 232; 233; 234; 235; 237; 238; Agadir Canyon; Atlantic Ocean; Atterberg settling tubes; Calculated; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Elevation of event; End member; Event label; GeoB4024-3; GeoB4025-2; GeoB4026-1; GeoB4029-2; GeoB4031-1; GeoB4038-2; GeoB4040-2; GeoB4057-2; GeoB4060-2; GeoB4210-2; GeoB4212-3; GeoB4213-1; GeoB4215-1; GeoB4216-2; GeoB4223-1; GeoB4225-3; GeoB4226-1; GeoB4228-1; GeoB4229-2; GeoB4230-1; GeoB4231-2; GeoB4232-1; GeoB4233-2; GeoB4235-1; GeoB4236-2; GeoB4237-1; GeoB4238-2; GeoB4239-1; GeoB5529-1; GeoB5531-1; GeoB5532-2; GeoB5533-1; GeoB5534-2; GeoB5535-1; GeoB5536-3; GeoB5537-2; GeoB5538-2; GeoB5539-2; GeoB5540-3; GeoB5541-2; GeoB5542-3; GeoB5546-3; GeoB5547-2; GeoB5548-3; GeoB5549-2; GeoB5550-3; GeoB5551-2; GeoB5553-2; GeoB5555-2; GeoB5556-3; GeoB5557-2; GeoB5558-2; GeoB5559-1; GeoB5560-2; GeoB5561-1; GeoB5565-3; GeoB5566-2; GeoB6005-1; GeoB6006-2; GeoB6007-1; GeoB6008-2; GeoB6009-1; GeoB6010-1; GeoB6011-2; GeoB7408-2; GeoB7409-1; GeoB7410-1; GeoB7413-2; GeoB7414-1; GeoB7415-1; GeoB7417-1; GeoB7418-1; GeoB7419-1; GeoB7420-1; GeoB7423-2; GeoB7424-1; GeoB7425-2; GeoB7426-1; GeoB7427-1; GeoB7428-1; GeoB7430-2; GeoB7431-1; Giant box corer; GIK16010-1; GIK16012-2; GIK16015-1; GIK16016-1; GIK16017-1; GIK16019-1; GIK16021-1; GIK16022-1; GIK16024-1; GIK16025-1; GIK16028-1; GIK16029-1; GIK16031-1; GIK16035-1; GKG; Grain size, sieving; Latitude of event; Longitude of event; M37/1; M42/4b; M45/5a; M60; MARUM; Meteor (1964); Meteor (1986); MUC; MultiCorer; POS272; Poseidon; Sand; Silt; Size fraction < 0.002 mm, clay; SUBTROPEX 82; van Veen Grab; VGRAB; VH96/1-3; VH96/1-4; Victor Hensen |
| url | https://doi.org/10.1594/PANGAEA.207974 |