Holz, Christine; Stuut, Jan-Berend W; Henrich, Rüdiger (2004): Grain-size analysis of surface sediments, continental margin off NW Africa [dataset]. 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
Project(s):
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: 0 m * Maximum DEPTH, sediment/rock: 0 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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Sand | Sand | % | Holz, Christine | Grain size, sieving | |
| 7 | Silt | Silt | % | Holz, Christine | Atterberg settling tubes | |
| 8 | Size fraction < 0.002 mm, clay | <2 µm | % | Holz, Christine | Atterberg settling tubes | |
| 9 | End member | EM | % | Holz, Christine | Calculated | EM1 |
| 10 | End member | EM | % | Holz, Christine | Calculated | EM2 |
| 11 | End member | EM | % | Holz, Christine | Calculated | EM3 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
519 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Depth sed [m] | 6 Sand [%] (Grain size, sieving) | 7 Silt [%] (Atterberg settling tubes) | 8 <2 µm [%] (Atterberg settling tubes) | 9 EM [%] (EM1, Calculated) | 10 EM [%] (EM2, Calculated) | 11 EM [%] (EM3, Calculated) |
|---|---|---|---|---|---|---|---|---|---|---|
| GIK16010-1 | 25.2840 | -16.2220 | -1502.0 | 0 | 38.26 | 44.39 | 17.35 | 12.9 | 63.6 | 23.5 |
| GIK16012-2 | 25.3950 | -16.2450 | -811.0 | 0 | 65.63 | 26.22 | 8.15 | 52.4 | 37.2 | 10.4 |
| GIK16015-1 | 25.3333 | -16.1533 | -411.0 | 0 | 93.13 | 6.87 | 0.00 | |||
| GIK16016-1 | 21.1440 | -18.0320 | -1476.0 | 0 | 29.23 | 53.71 | 17.06 | 37.6 | 60.4 | 2.0 |
| GIK16017-1 | 21.2450 | -17.8030 | -794.0 | 0 | 45.30 | 45.69 | 9.01 | 85.2 | 9.1 | 5.7 |
| GIK16019-1 | 21.2500 | -17.6917 | -509.0 | 0 | 77.71 | 18.84 | 3.44 | 97.6 | 0.0 | 2.4 |
| GIK16021-1 | 17.1950 | -17.0150 | -1514.0 | 0 | 27.53 | 45.16 | 27.31 | 3.6 | 76.9 | 19.4 |
| GIK16022-1 | 17.3017 | -16.7600 | -415.0 | 0 | 74.62 | 18.80 | 6.58 | 84.7 | 0.0 | 15.3 |
| GIK16024-1 | 17.2933 | -16.8667 | -805.0 | 0 | 36.97 | 47.56 | 15.47 | 58.9 | 33.8 | 7.3 |
| GIK16025-1 | 17.3100 | -16.8883 | -1190.0 | 0 | 22.45 | 53.19 | 24.37 | 32.5 | 57.5 | 10.1 |
| GIK16028-1 | 17.2783 | -16.4483 | -89.0 | 0 | 84.60 | 10.85 | 4.54 | 20.3 | 73.1 | 6.6 |
| GIK16029-1 | 25.4400 | -16.3150 | -1202.0 | 0 | 65.92 | 20.87 | 13.20 | |||
| GIK16031-1 | 21.2383 | -17.9350 | -1203.0 | 0 | 44.91 | 43.46 | 11.64 | 55.2 | 38.4 | 6.5 |
| GIK16035-1 | 25.0283 | -16.6133 | -1222.0 | 0 | 23.64 | 53.91 | 22.45 | 21.7 | 62.9 | 15.4 |
| GeoB4024-3 | 27.6783 | -13.4317 | -95.0 | 0 | 94.82 | 5.18 | 0.00 | |||
| GeoB4025-2 | 27.7483 | -13.4883 | -504.0 | 0 | 53.85 | 32.45 | 13.70 | 33.6 | 34.7 | 31.7 |
| GeoB4026-1 | 27.8083 | -13.5433 | -990.0 | 0 | 13.99 | 53.07 | 32.94 | |||
| GeoB4029-2 | 28.1800 | -13.2633 | -680.0 | 0 | 53.12 | 36.93 | 9.96 | 37.8 | 39.9 | 22.3 |
| GeoB4031-1 | 28.1283 | -13.1883 | -100.0 | 0 | 91.15 | 8.23 | 0.62 | |||
| GeoB4038-2 | 28.6767 | -13.0367 | -695.0 | 0 | 18.68 | 52.28 | 29.03 | 0.0 | 66.7 | 33.3 |
| GeoB4040-2 | 29.1933 | -13.3350 | -1000.0 | 0 | 49.22 | 39.01 | 11.77 | 6.4 | 57.3 | 36.2 |
| GeoB4057-2 | 28.5833 | -13.7350 | -1000.0 | 0 | 21.30 | 49.54 | 29.16 | 0.0 | 44.9 | 55.1 |
| GeoB4060-2 | 28.1250 | -13.8483 | -1000.0 | 0 | 41.91 | 35.92 | 22.17 | 11.4 | 48.4 | 40.2 |
| GeoB4210-2 | 30.3000 | -10.9800 | -1959.0 | 0 | 13.22 | 38.03 | 48.75 | 7.6 | 1.1 | 91.3 |
| GeoB4212-3 | 29.6033 | -10.9500 | -1256.0 | 0 | 22.56 | 55.88 | 21.56 | |||
| GeoB4213-1 | 29.6967 | -11.0783 | -1547.0 | 0 | 37.07 | 31.63 | 31.29 | 8.1 | 19.5 | 72.5 |
| GeoB4215-1 | 30.0367 | -11.5533 | -2106.0 | 0 | 51.26 | 25.04 | 23.70 | |||
| GeoB4216-2 | 30.6317 | -12.3967 | -2325.0 | 0 | 57.29 | 31.09 | 11.62 | |||
| GeoB4223-1 | 29.0183 | -12.4667 | -777.0 | 0 | 12.59 | 51.38 | 36.03 | 1.4 | 51.5 | 47.1 |
| GeoB4225-3 | 29.2750 | -11.7817 | -1281.0 | 0 | 27.59 | 37.77 | 34.64 | 7.5 | 32.5 | 60.0 |
| GeoB4226-1 | 29.3200 | -11.8333 | -1400.0 | 0 | 32.71 | 34.08 | 33.21 | 2.6 | 32.8 | 64.6 |
| GeoB4228-1 | 29.4700 | -12.9900 | -1633.0 | 0 | 38.08 | 38.71 | 23.21 | |||
| GeoB4229-2 | 29.1817 | -12.6383 | -1422.0 | 0 | 26.47 | 47.36 | 26.17 | |||
| GeoB4230-1 | 29.1283 | -12.5967 | -1316.0 | 0 | 20.58 | 41.18 | 38.24 | 0.9 | 31.9 | 67.2 |
| GeoB4231-2 | 29.0883 | -12.5550 | -1207.0 | 0 | 23.45 | 44.03 | 32.52 | |||
| GeoB4232-1 | 29.0217 | -13.3867 | -1161.0 | 0 | 35.51 | 40.15 | 24.34 | 6.8 | 39.3 | 53.9 |
| GeoB4233-2 | 28.9750 | -13.3300 | -1303.0 | 0 | 25.30 | 46.13 | 28.57 | 2.2 | 33.1 | 64.7 |
| GeoB4235-1 | 28.8567 | -13.1800 | -1244.0 | 0 | 17.27 | 44.48 | 38.26 | 1.2 | 31.7 | 67.0 |
| GeoB4236-2 | 28.7833 | -13.0950 | -1030.0 | 0 | 19.25 | 44.32 | 36.43 | 0.1 | 44.5 | 55.5 |
| GeoB4237-1 | 28.7283 | -13.0167 | -800.0 | 0 | 15.16 | 56.39 | 28.46 | |||
| GeoB4238-2 | 28.4517 | -13.6350 | -1185.0 | 0 | 25.22 | 42.16 | 32.62 | 0.8 | 43.9 | 55.3 |
| GeoB4239-1 | 28.4933 | -13.1800 | -881.0 | 0 | 18.77 | 47.00 | 34.23 | 0.2 | 53.7 | 46.1 |
| GeoB5529-1 | 29.6900 | -17.6983 | -4166.0 | 0 | 4.32 | 61.18 | 34.50 | 0.0 | 57.5 | 42.5 |
| GeoB5531-1 | 29.0800 | -17.9250 | -3301.0 | 0 | 21.53 | 55.80 | 22.66 | 0.0 | 45.1 | 54.9 |
| GeoB5532-2 | 27.4717 | -17.9333 | -3150.0 | 0 | 23.21 | 51.58 | 25.22 | 9.2 | 47.9 | 42.9 |
| GeoB5533-1 | 27.6817 | -17.6933 | -3251.0 | 0 | 20.27 | 50.67 | 29.06 | 1.6 | 48.7 | 49.7 |
| GeoB5534-2 | 27.8683 | -17.1300 | -2832.0 | 0 | 15.26 | 54.49 | 30.25 | 2.7 | 48.2 | 49.1 |
| GeoB5535-1 | 27.8433 | -16.4533 | -2690.0 | 0 | 33.11 | 46.10 | 20.80 | 6.7 | 53.3 | 40.0 |
| GeoB5536-3 | 27.5367 | -16.1350 | -3456.0 | 0 | 7.04 | 58.89 | 34.06 | 0.0 | 41.1 | 58.9 |
| GeoB5537-2 | 27.5350 | -15.4017 | -2362.0 | 0 | 30.83 | 42.83 | 26.34 | 1.9 | 47.0 | 51.1 |
| GeoB5538-2 | 27.5367 | -15.1167 | -2537.0 | 0 | 27.85 | 38.27 | 33.88 | 6.2 | 40.6 | 53.2 |
| GeoB5539-2 | 27.5367 | -14.3550 | -2202.0 | 0 | 11.44 | 44.41 | 44.15 | |||
| GeoB5540-3 | 27.5350 | -14.1750 | -2035.0 | 0 | 7.85 | 44.33 | 47.83 | 6.9 | 27.8 | 65.3 |
| GeoB5541-2 | 27.5367 | -13.9950 | -1748.0 | 0 | 6.96 | 49.13 | 43.91 | 4.9 | 31.9 | 63.2 |
| GeoB5542-3 | 27.5367 | -13.8467 | -1431.0 | 0 | 8.19 | 45.50 | 46.31 | 0.4 | 37.3 | 62.3 |
| GeoB5546-3 | 27.5367 | -13.7367 | -1071.0 | 0 | 6.24 | 63.02 | 30.73 | 2.0 | 55.7 | 42.3 |
| GeoB5547-2 | 27.7600 | -13.7100 | -1310.0 | 0 | 7.64 | 49.17 | 43.19 | 3.9 | 27.8 | 68.4 |
| GeoB5548-3 | 27.9917 | -13.5183 | -1162.0 | 0 | 8.11 | 54.80 | 37.09 | 0.0 | 39.1 | 60.9 |
| GeoB5549-2 | 27.9783 | -13.6950 | -1454.0 | 0 | 11.58 | 46.19 | 42.22 | 4.3 | 32.6 | 63.1 |
| GeoB5550-3 | 27.9517 | -15.0150 | -1738.0 | 0 | 15.34 | 43.41 | 41.25 | 1.3 | 30.4 | 68.2 |
| GeoB5551-2 | 27.8767 | -14.9150 | -1885.0 | 0 | 17.67 | 45.15 | 37.18 | 0.0 | 40.2 | 59.8 |
| GeoB5553-2 | 28.2767 | -14.6450 | -3397.0 | 0 | 24.92 | 46.07 | 29.01 | 0.0 | 41.3 | 58.7 |
| GeoB5555-2 | 29.2667 | -13.9567 | -2837.0 | 0 | 22.48 | 52.14 | 25.38 | 0.0 | 48.8 | 51.2 |
| GeoB5556-3 | 29.2650 | -14.1100 | -3170.0 | 0 | 17.10 | 59.32 | 23.58 | 0.0 | 57.8 | 42.2 |
| GeoB5557-2 | 29.0450 | -14.1650 | -2949.0 | 0 | 42.77 | 39.33 | 17.90 | 0.0 | 80.1 | 19.9 |
| GeoB5558-2 | 28.7450 | -14.3533 | -2471.0 | 0 | 39.40 | 38.42 | 22.17 | 0.0 | 48.5 | 51.5 |
| GeoB5559-1 | 31.6450 | -13.1867 | -3178.0 | 0 | 30.60 | 36.65 | 32.75 | |||
| GeoB5560-2 | 31.6100 | -13.1183 | -3944.0 | 0 | 32.92 | 32.07 | 35.01 | |||
| GeoB5561-1 | 32.7033 | -12.9350 | -3500.0 | 0 | 31.17 | 57.82 | 11.00 | 0.0 | 20.7 | 79.3 |
| GeoB5565-3 | 33.2983 | -9.3900 | -791.0 | 0 | 23.58 | 43.91 | 32.51 | 5.1 | 16.1 | 78.8 |
| GeoB5566-2 | 33.2733 | -9.6050 | -2785.0 | 0 | 9.92 | 42.12 | 47.96 | 5.9 | 0.0 | 94.1 |
| GeoB6005-1 | 30.8800 | -10.8967 | -1781.0 | 0 | 5.94 | 44.34 | 49.71 | 2.9 | 0.0 | 97.1 |
| GeoB6006-2 | 30.8683 | -10.6300 | -1282.0 | 0 | 9.90 | 49.40 | 40.70 | 1.9 | 8.9 | 89.1 |
| GeoB6007-1 | 30.8517 | -10.2667 | -899.0 | 0 | 1.58 | 62.53 | 35.89 | 0.0 | 11.3 | 88.7 |
| GeoB6008-2 | 30.8450 | -10.0983 | -355.0 | 0 | 0.46 | 42.36 | 57.17 | 0.0 | 18.2 | 81.8 |
| GeoB6009-1 | 30.6817 | -10.2750 | -579.0 | 0 | 7.28 | 54.24 | 38.48 | 6.9 | 30.0 | 63.0 |
| GeoB6010-1 | 30.2500 | -10.0833 | -406.0 | 0 | 56.97 | 34.98 | 8.05 | 73.4 | 9.7 | 17.0 |
| GeoB6011-2 | 30.3150 | -10.2883 | -993.0 | 0 | 13.83 | 46.36 | 39.81 | 1.0 | 36.7 | 62.4 |
| GeoB7408-2 | 20.2917 | -18.2483 | -1935.0 | 0 | 18.48 | 55.01 | 26.51 | 8.9 | 75.6 | 15.5 |
| GeoB7409-1 | 20.3933 | -18.0183 | -1216.0 | 0 | 26.69 | 57.54 | 15.77 | 29.6 | 63.9 | 6.5 |
| GeoB7410-1 | 20.4500 | -17.8500 | -643.0 | 0 | 52.43 | 38.17 | 9.40 | 59.8 | 35.9 | 4.3 |
| GeoB7413-2 | 20.6467 | -17.8450 | -508.0 | 0 | 77.49 | 18.95 | 3.56 | 62.0 | 34.7 | 3.3 |
| GeoB7414-1 | 20.7183 | -18.0000 | -1014.0 | 0 | 45.37 | 46.07 | 8.57 | 31.7 | 68.3 | 0.0 |
| GeoB7415-1 | 20.8050 | -18.2617 | -1906.0 | 0 | 5.84 | 66.80 | 27.36 | |||
| GeoB7417-1 | 21.7967 | -17.4783 | -726.0 | 0 | 69.86 | 22.17 | 7.96 | |||
| GeoB7418-1 | 21.8433 | -17.5867 | -1150.0 | 0 | 26.89 | 54.08 | 19.03 | 37.9 | 54.7 | 7.4 |
| GeoB7419-1 | 21.8850 | -17.7717 | -1537.0 | 0 | 9.24 | 62.15 | 28.62 | 8.9 | 75.6 | 15.5 |
| GeoB7420-1 | 24.1650 | -16.7883 | -676.0 | 0 | 48.53 | 35.77 | 15.70 | 28.2 | 53.1 | 18.8 |
| GeoB7423-2 | 24.3383 | -17.0700 | -1624.0 | 0 | 21.34 | 47.10 | 31.56 | 0.0 | 58.4 | 41.6 |
| GeoB7424-1 | 24.2100 | -16.8433 | -1063.0 | 0 | 53.17 | 32.91 | 13.92 | 30.7 | 59.7 | 9.7 |
| GeoB7425-2 | 25.9200 | -16.0850 | -1810.0 | 0 | 25.28 | 47.02 | 27.70 | |||
| GeoB7426-1 | 25.9867 | -15.8667 | -1487.0 | 0 | 76.69 | 20.20 | 3.10 | |||
| GeoB7427-1 | 26.0317 | -15.7033 | -1101.0 | 0 | 26.17 | 53.21 | 20.63 | 11.8 | 68.2 | 20.0 |
| GeoB7428-1 | 26.1050 | -15.4767 | -918.0 | 0 | 49.59 | 33.70 | 16.71 | 6.6 | 76.3 | 17.1 |
| GeoB7430-2 | 26.3833 | -15.1500 | -1170.0 | 0 | 32.62 | 46.99 | 20.38 | 12.1 | 65.1 | 22.8 |
| GeoB7431-1 | 26.4767 | -15.2583 | -1951.0 | 0 | 25.77 | 45.17 | 29.05 | 0.0 | 57.0 | 43.0 |