Giraudeau, Jacques; Meyers, Philip A; Christensen, Beth A (2002): (Table 2) Age interval and accumulation rates of organic and inorganic carbon from ODP Sites 175-1082, 175-1084, 175-1085 and 175-1087 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.767418
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Abstract:
The Ocean Drilling Program Leg 175 recovered a unique series of stratigraphically continuous sedimentary sections along the SW African margin, an area which is presently affected by active coastal upwelling. The accumulation rates of organic and inorganic carbon are a major component of this record. Four Leg 175 sites (1082, 1084, 1085, 1087) are chosen as part of a latitudinal transect from the present northern to southern boundaries of the Benguela Current upwelling system, to decipher the Pliocene-Pleistocene history of biogenic production and its relationship with global and local changes in oceanic circulation and climate. The pattern of CaCO3 and Corg mass accumulation rates (MARs) over 0.25-Myr intervals indicates that the evolution of carbon burial is highly variable between the northern and the southern Benguela regions, as well as between sites that have similar hydrological conditions. This, as well as the presence over most locations of high-amplitude, rapid changes of carbon burial, reflect the partitioning of biogenic production and patterns of sedimentation into local compartments over the Benguela margin. The combined mapping of CaCO3 and Corg MARs at the study locations suggests four distinct evolutionary periods, which are essentially linked with major steps in global climate change: the early Pliocene, the mid-Pliocene warm event, a late Pliocene intensification of northern hemisphere glaciation and the Pleistocene. The early Pliocene spatially heterogeneous patterns of carbon burial are thought to reflect the occurrence of mass-gravitational movements over the Benguela slope which resulted in disruption of the recorded biogenic production. This was followed (3.5-3 Ma) by an episode of peak carbonate accumulation over the whole margin and, subsequently, by the onset of Benguela provincialism into a northern and a southern sedimentary regime near 2 Ma. This mid and late Pliocene evolution is interpreted as a direct response to changes in the ventilation of bottom and intermediate waters, as well as to dynamics of the subtropical gyral circulation and associated wind stress.
Related to:
Giraudeau, Jacques; Meyers, Philip A; Christensen, Beth A (2002): Accumulation of organic and inorganic carbon in Pliocene-Pleistocene sediments along the SW African margin. Marine Geology, 180(1-4), 49-69, https://doi.org/10.1016/S0025-3227(01)00205-5
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -26.861840 * Median Longitude: 13.537292 * South-bound Latitude: -31.465083 * West-bound Longitude: 11.820556 * North-bound Latitude: -21.094194 * East-bound Longitude: 15.310889
Date/Time Start: 1997-09-13T00:00:00 * Date/Time End: 1997-10-03T00:00:00
Minimum DEPTH, sediment/rock: 5 m * Maximum DEPTH, sediment/rock: 585 m
Event(s):
175-1082 * Latitude: -21.094194 * Longitude: 11.820556 * Date/Time: 1997-09-13T00:00:00 * Elevation: -1280.6 m * Penetration: 929.6 m * Recovery: 853 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 102 cores; 929.6 m cored; 0 m drilled; 91.8% recovery
175-1084 * Latitude: -25.513667 * Longitude: 13.027778 * Date/Time: 1997-09-21T00:00:00 * Elevation: -1992.2 m * Penetration: 995.4 m * Recovery: 916 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 107 cores; 995.4 m cored; 0 m drilled; 92% recovery
175-1085 * Latitude: -29.374417 * Longitude: 13.989944 * Date/Time: 1997-09-26T00:00:00 * Elevation: -1713.1 m * Penetration: 925.2 m * Recovery: 921 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 99 cores; 925.2 m cored; 0 m drilled; 99.5% recovery
Comment:
Depth sediment and error are given in mbsf.
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1087 data points
Data
1 Event | 2 DL | 3 Age [ka BP] | 4 Depth sed [m] | 5 Error | 6 Age min [ka] | 7 Age max [ka] | 8 Depth top [m] | 9 Depth bot [m] | 10 Depth comp top [mcd] | 11 Depth comp bot [mcd] | 12 SR [cm/ka] | 13 Poros [% vol] | 14 CaCO3 [%] | 15 Acc rate CaCO3 [g/cm2/ka] | 16 TOC [%] | 17 Acc rate TOC [g/cm2/ka] |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
175-1082 | T G. caribbeanica acme | 260 | 26 | 1 | 0 | 250 | 0 | 25 | 0 | 25 | 10.0 | 76 | 50.3 | 3.26 | 5.0 | 0.32 |
175-1082 | T P. lacunosa | 460 | 41 | 2 | 250 | 500 | 25 | 45 | 25 | 50 | 10.0 | 72 | 62.8 | 4.75 | 3.6 | 0.27 |
175-1082 | Brunhes (o) | 780 | 74 | 500 | 750 | 45 | 67 | 50 | 76 | 10.4 | 73 | 36.8 | 2.79 | 6.9 | 0.52 | |
175-1082 | T R. asanoi | 830 | 68 | 2 | 750 | 1000 | 67 | 97 | 76 | 111 | 14.0 | 74 | 37.0 | 3.64 | 5.3 | 0.52 |
175-1082 | Jaramillo (t) | 990 | 97 | 1000 | 1250 | 97 | 120 | 111 | 136 | 10.0 | 74 | 33.1 | 2.32 | 4.9 | 0.34 | |
175-1082 | Jaramillo (o) | 1070 | 105 | 1250 | 1500 | 120 | 138 | 136 | 154 | 7.2 | 74 | 38.1 | 1.93 | 4.3 | 0.22 | |
175-1082 | Cobb Mountain | 1200 | 118 | 1500 | 1750 | 138 | 165 | 154 | 181 | 10.8 | 74 | 36.4 | 2.76 | 4.2 | 0.32 | |
175-1082 | T H. sellii | 1250 | 117 | 2 | 1750 | 2000 | 165 | 190 | 181 | 206 | 10.0 | 75 | 18.3 | 1.24 | 4.9 | 0.33 |
175-1082 | T C. macintyrei | 1670 | 149 | 4 | 2000 | 2250 | 190 | 238 | 206 | 254 | 19.2 | 74 | 28.5 | 3.84 | 4.6 | 0.62 |
175-1082 | Olduvai (t) | 1770 | 165 | 2250 | 2500 | 238 | 270 | 254 | 286 | 12.8 | 76 | 31.2 | 2.59 | 3.6 | 0.30 | |
175-1082 | T C. pliocenica | 1830 | 188 | 5 | 2500 | 2750 | 270 | 280 | 286 | 296 | 4.0 | 77 | 30.0 | 0.75 | 3.7 | 0.09 |
175-1082 | Olduvai (o) | 1950 | 182 | 2750 | 3000 | 280 | 305 | 296 | 321 | 10.0 | 76 | 35.2 | 2.28 | 2.7 | 0.17 | |
175-1082 | T D. brouweri | 1950 | 207 | 6 | 3000 | 3250 | 305 | 335 | 321 | 351 | 12.0 | 74 | 39.8 | 3.35 | 3.1 | 0.26 |
175-1082 | T T. convexa | 2190 | 257 | 5 | 3250 | 3500 | 335 | 376 | 351 | 392 | 16.4 | 69 | 37.2 | 5.11 | 3.7 | 0.51 |
175-1082 | Gauss (t) | 2500 | 270 | 3500 | 3750 | 376 | 405 | 392 | 421 | 11.6 | 65 | 54.9 | 6.02 | 2.2 | 0.24 | |
175-1082 | B C. davisiana | 2700 | 277 | 3 | 3750 | 4000 | 405 | 410 | 421 | 426 | 2.0 | 61 | 67.0 | 1.41 | 1.8 | 0.04 |
175-1082 | B R. praebergonii | 3120 | 313 | 1 | 4000 | 4250 | 410 | 420 | 426 | 436 | 4.0 | 60 | 50.4 | 2.18 | 2.9 | 0.13 |
175-1082 | Mammoth | 3270 | 340 | 4250 | 4500 | 420 | 440 | 436 | 456 | 8.0 | 61 | 49.8 | 4.20 | 2.2 | 0.19 | |
175-1082 | Gilbert (t) | 3580 | 390 | 4500 | 4750 | 440 | 457 | 456 | 473 | 6.8 | 58 | 57.5 | 4.43 | 1.3 | 0.10 | |
175-1082 | T Sphenolithus spp. | 3660 | 401 | 5 | 4750 | 5000 | 457 | 475 | 473 | 491 | 7.2 | 57 | 55.3 | 4.62 | 2.5 | 0.21 |
175-1082 | Cochiti | 4180 | 415 | |||||||||||||
175-1082 | Sidujfall | 4800 | 460 | |||||||||||||
175-1082 | Thvera | 4980 | 475 | |||||||||||||
175-1084 | T G. caribbeanica acme | 260 | 49 | 1 | 0 | 250 | 0 | 50 | 0 | 58 | 23.2 | 80 | 32.2 | 4.03 | 7.9 | 0.99 |
175-1084 | T P. lacunosa | 460 | 78 | 1 | 250 | 500 | 50 | 85 | 58 | 100 | 16.8 | 72 | 57.8 | 7.34 | 5.1 | 0.65 |
175-1084 | T Small Gephyrocapsa acme | 600 | 97 | 2 | 500 | 750 | 85 | 132 | 100 | 156 | 22.4 | 73 | 38.7 | 6.32 | 6.6 | 1.08 |
175-1084 | Brunhes (o) | 780 | 147 | 750 | 1000 | 85 | 185 | 156 | 214 | 23.2 | 74 | 25.3 | 4.12 | 6.9 | 1.12 | |
175-1084 | T B. quadrangula | 800 | 139 | 4 | 1000 | 1250 | 185 | 232 | 214 | 261 | 18.8 | 70 | 23.4 | 3.56 | 9.7 | 1.48 |
175-1084 | T R. asanoi | 830 | 140 | 2 | 1250 | 1500 | 232 | 260 | 261 | 289 | 11.2 | 72 | 27.1 | 2.29 | 6.3 | 0.53 |
175-1084 | Jaramillo (t) | 990 | 185 | 1500 | 1750 | 260 | 290 | 289 | 319 | 12.0 | 72 | 26.8 | 2.43 | 6.2 | 0.56 | |
175-1084 | B R. asanoi | 1060 | 207 | <1 | 1750 | 2000 | 290 | 322 | 319 | 351 | 12.8 | 74 | 23.9 | 2.15 | 5.3 | 0.48 |
175-1084 | Jaramillo (o) | 1070 | 200 | 2000 | 2250 | 322 | 370 | 351 | 399 | 19.2 | 77 | 12.1 | 1.44 | 4.8 | 0.57 | |
175-1084 | T H. sellii | 1250 | 233 | 1 | 2250 | 2500 | 370 | 415 | 399 | 444 | 18.0 | 78 | 17.3 | 1.85 | 4.3 | 0.46 |
175-1084 | T C. macintyrei | 1670 | 283 | 1 | 2500 | 2750 | 415 | 448 | 444 | 477 | 13.2 | 78 | 26.6 | 2.09 | 3.0 | 0.24 |
175-1084 | Olduvai (t) | 1770 | 293 | 2750 | 3000 | 448 | 465 | 477 | 494 | 6.8 | 75 | 35.2 | 1.62 | 2.8 | 0.13 | |
175-1084 | T C. pliocenica | 1830 | 288 | 5 | 3000 | 3250 | 465 | 490 | 494 | 519 | 10.0 | 70 | 39.1 | 3.17 | 4.1 | 0.33 |
175-1084 | Olduvai (o) | 1950 | 315 | 3250 | 3500 | 490 | 525 | 519 | 554 | 14.0 | 64 | 37.2 | 5.06 | 4.8 | 0.65 | |
175-1084 | TD. Brouweri | 1950 | 314 | 9 | 3500 | 3750 | 525 | 550 | 554 | 579 | 10.0 | 61 | 47.5 | 5.00 | 4.0 | 0.42 |
175-1084 | T D. surculus | 2550 | 426 | 4 | 3750 | 4000 | 550 | 562 | 579 | 591 | 4.8 | 61 | 40.4 | 2.04 | 3.1 | 0.15 |
175-1084 | Gauss (t) | 2580 | 430 | 4000 | 4250 | 562 | 583 | 591 | 612 | 8.4 | 60 | 43.8 | 3.97 | 2.8 | 0.25 | |
175-1084 | B C. davisiana | 2700 | 445 | 6 | 4250 | 4500 | 583 | 610 | 612 | 639 | 10.8 | 62 | 49.7 | 5.50 | 2.8 | 0.31 |
175-1084 | B R. praebergonii | 3120 | 474 | 4 | 4500 | 4750 | ||||||||||
175-1084 | Gilbert (t) | 3580 | 535 | 4750 | 5000 | |||||||||||
175-1084 | T R. pseudoumbilicus | 3820 | 553 | <1 | 0 | 0 | ||||||||||
175-1084 | Cochiti (t) | 4180 | 575 | 0 | 0 | |||||||||||
175-1084 | Cochiti (o) | 4290 | 585 | 0 | 0 | |||||||||||
175-1085 | B E. huxleyi acme | 90 | 5 | 1 | 0 | 250 | 0 | 7 | 0 | 9 | 3.6 | 69 | 70.6 | 2.13 | 0.8 | 0.02 |
175-1085 | T G. caribbeanica acme | 260 | 8 | 2 | 250 | 500 | 7 | 21 | 9 | 24 | 6.0 | 66 | 78.7 | 4.33 | 1.6 | 0.09 |
175-1085 | T P. lacunosa | 460 | 15 | 1 | 500 | 750 | 21 | 38 | 24 | 44 | 8.0 | 67 | 74.4 | 5.30 | 1.0 | 0.07 |
175-1085 | T Small Gephyrocapsa acme | 600 | 33 | 2 | 750 | 1000 | 38 | 47 | 44 | 52 | 3.2 | 65 | 72.6 | 2.20 | 2.1 | 0.06 |
175-1085 | Brunhes (o) | 780 | 40 | 1000 | 1250 | 47 | 56 | 52 | 64 | 4.8 | 63 | 64.4 | 3.09 | 1.8 | 0.09 | |
175-1085 | T R. asanoi | 830 | 40 | 2 | 1250 | 1500 | 56 | 65 | 64 | 72 | 3.2 | 62 | 58.7 | 1.93 | 1.0 | 0.03 |
175-1085 | T Small Gephyrocapsa acme | 960 | 46 | 3 | 1500 | 1750 | 65 | 80 | 72 | 89 | 6.8 | 61 | 61.9 | 4.43 | 2.8 | 0.20 |
175-1085 | Jaramillo (t) | 990 | 47 | 1750 | 2000 | 80 | 92 | 89 | 102 | 5.2 | 62 | 65.3 | 3.48 | 0.7 | 0.04 | |
175-1085 | T H. sellii | 1250 | 56 | 2 | 2000 | 2250 | 92 | 97 | 102 | 107 | 2.0 | 63 | 66.8 | 1.33 | 0.8 | 0.02 |
175-1085 | T C. macintyrei | 1670 | 71 | 2 | 2250 | 2500 | 97 | 110 | 107 | 121 | 5.6 | 62 | 73.3 | 4.21 | 0.7 | 0.04 |
175-1085 | Olduvai (t) | 1770 | 80 | 2500 | 2750 | 110 | 120 | 121 | 133 | 4.8 | 61 | 74.7 | 3.78 | 0.7 | 0.04 | |
175-1085 | Olduvai (o) | 1950 | 90 | 2750 | 3000 | 120 | 135 | 133 | 150 | 6.8 | 61 | 72.2 | 5.17 | 0.7 | 0.05 | |
175-1085 | T D. brouweri | 1950 | 91 | 1 | 3000 | 3250 | 135 | 152 | 150 | 168 | 7.2 | 60 | 67.2 | 5.23 | 1.1 | 0.09 |
175-1085 | T T. convexa | 2190 | 94 | 4 | 3250 | 3500 | 152 | 168 | 168 | 184 | 6.4 | 60 | 71.5 | 4.94 | 0.9 | 0.06 |
175-1085 | T D. surculus | 2550 | 113 | 5 | 3500 | 3750 | 168 | 185 | 184 | 200 | 6.4 | 60 | 69.4 | 4.80 | 0.9 | 0.06 |
175-1085 | Gauss (t) | 2580 | 113 | 3750 | 4000 | 185 | 203 | 200 | 221 | 8.4 | 59 | 61.2 | 5.69 | 0.9 | 0.08 | |
175-1085 | T D. tamalis | 2830 | 123 | 5 | 4000 | 4250 | 203 | 222 | 221 | 242 | 8.4 | 58 | 63.9 | 6.09 | 0.8 | 0.08 |
175-1085 | Gilbert (t) | 3580 | 174 | 4250 | 4500 | 222 | 236 | 242 | 258 | 6.4 | 57 | 63.5 | 4.72 | 1.2 | 0.09 | |
175-1085 | T R. pseudoumbilicus | 3820 | 189 | 5 | 4500 | 4750 | 236 | 260 | 258 | 287 | 11.6 | 56 | 65.6 | 9.04 | 1.1 | 0.15 |
175-1085 | Cochiti | 4230 | 220 | 4750 | 5000 | 260 | 272 | 287 | 299 | 4.8 | 57 | 78.2 | 4.36 | 0.8 | 0.04 | |
175-1085 | Nunivak (t) | 4480 | 235 | |||||||||||||
175-1085 | T A. tricorniculatus | 4500 | 227 | 5 | ||||||||||||
175-1085 | Nunivak (o) | 4620 | 245 | |||||||||||||
175-1085 | Sidujfall (t) | 4800 | 265 | |||||||||||||
175-1085 | Sidujfall (o) | 5230 | 280 | |||||||||||||
175-1087 | T G. caribbeanica acme | 260 | 6 | 2 | 0 | 250 | 0 | 6 | 0 | 6 | 2.4 | 66 | 81.8 | 1.78 | 0.8 | 0.02 |
175-1087 | T P. lacunosa | 460 | 13 | 1 | 250 | 500 | 6 | 14 | 6 | 15 | 3.6 | 65 | 77.5 | 2.64 | 1.3 | 0.04 |
175-1087 | T Small Gephyrocapsa acme | 600 | 16 | 2 | 500 | 750 | 14 | 23 | 15 | 25 | 4.0 | 67 | 76.2 | 2.72 | 2.1 | 0.07 |
175-1087 | Brunhes (o) | 780 | 27 | 750 | 1000 | 23 | 32 | 25 | 35 | 4.0 | 65 | 76.5 | 2.89 | 1.3 | 0.05 | |
175-1087 | T R. asanoi | 830 | 26 | 1 | 1000 | 1250 | 32 | 38 | 35 | 44 | 3.6 | 64 | 81.6 | 2.90 | 1.2 | 0.04 |
175-1087 | T H. sellii | 1250 | 38 | 2 | 1250 | 1500 | 38 | 50 | 44 | 57 | 5.2 | 61 | 68.0 | 3.72 | 1.6 | 0.09 |
175-1087 | T C. macintyrei | 1670 | 50 | 1 | 1500 | 1750 | 50 | 62 | 57 | 71 | 5.6 | 60 | 69.5 | 4.20 | 1.7 | 0.10 |
175-1087 | Olduvai (t) | 1770 | 63 | 1750 | 2000 | 62 | 70 | 71 | 80 | 3.6 | 60 | 65.4 | 2.54 | 1.7 | 0.07 | |
175-1087 | Olduvai (o) | 1950 | 68 | 2000 | 2250 | 70 | 80 | 80 | 91 | 4.4 | 60 | 68.0 | 3.23 | 2.0 | 0.09 | |
175-1087 | T D. brouweri | 1950 | 61 | 5 | 2250 | 2500 | 80 | 90 | 91 | 102 | 4.4 | 60 | 68.9 | 3.24 | 1.6 | 0.08 |
175-1087 | T D. surculus | 2550 | 79 | 5 | 2500 | 2750 | 90 | 105 | 102 | 119 | 6.8 | 62 | 80.2 | 5.67 | 0.9 | 0.06 |
175-1087 | Gauss (t) | 2580 | 93 | 2750 | 3000 | 105 | 121 | 119 | 136 | 6.8 | 61 | 72.4 | 5.18 | 1.3 | 0.09 | |
175-1087 | T D. tamalis | 2830 | 99 | 5 | 3000 | 3250 | 121 | 141 | 136 | 158 | 8.8 | 59 | 74.6 | 7.27 | 1.5 | 0.14 |
175-1087 | Kaena (o) | 3110 | 128 | 3250 | 3500 | 141 | 165 | 158 | 191 | 13.2 | 60 | 75.9 | 10.82 | 1.5 | 0.21 | |
175-1087 | Mammoth (o) | 3330 | 147 | 3500 | 3750 | 165 | 178 | 191 | 204 | 5.2 | 60 | 75.7 | 4.25 | 1.5 | 0.08 | |
175-1087 | Gilbert (t) | 3580 | 173 | 3750 | 4000 | 178 | 183 | 204 | 214 | 4.0 | 60 | 69.9 | 3.06 | 0.9 | 0.04 | |
175-1087 | T R. pseudoumbilicus | 3820 | 174 | 6 | 4000 | 4250 | 183 | 189 | 214 | 220 | 2.4 | 60 | 77.5 | 2.03 | 1.2 | 0.03 |
175-1087 | T A. tricorniculatus | 4500 | 194 | 5 | 4250 | 4500 | 189 | 194 | 220 | 225 | 2.0 | 58 | 71.4 | 1.62 | 1.0 | 0.02 |
175-1087 | T D. quinqueramus | 5540 | 211 | 3 | 4500 | 4750 | 194 | 198 | 225 | 229 | 1.6 | 58 | 72.2 | 1.29 | 0.7 | 0.01 |
175-1087 | 4750 | 5000 | 198 | 203 | 229 | 234 | 2.0 | 58 | 77.4 | 1.73 | 0.8 | 0.02 |