Citation:

PANGAEA.760778, Supplement to: Kuptsov, VM; Sharay, IV (1993): Rates of recent accumulation of sediments on shelf of West Equatorial Africa near Congo mouth. Oceanology, 33(3), 353-358

Name: (Table 1) Distribution of 210Pb in the surface layer of shelf sediments near the Congo mouth and sedimentation rates
Published: 1993
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

A constant concentration model was used in conjunction with the nonequilibrium 210Pb method in determining mean sedimentation rates of bottom sediments sampled during Cruise 20 of R/V Vityaz-II in a test range occurred on the Atlantic shelf near the Congo mouth. 210Pb distribution was analyzed at 16 stations located within a canyon, which is an extension of the Congo channel, and on its shoulders. On the canyon floor at depths 1 km within 12-15 cm sampled sediment monoliths it was possible to detect sediments re-deposited from the canyon walls characterized by high 210Pb concentrations. Sedimentation rates of the surface layer of sediments vary in the range 0.065-0.290 cm/year with the mean value 0.141+/-0.083 cm/year. At most stations the analysis of 210Pb distribution indicates presence of re-deposited matter. Integral activity of 210Pb was used to mark five stations with sediment accumulation regime close to that in the adopted model. Sedimentation rate for these five stations is 0.082+/-0.024 cm/year.

Project(s):

Archive of Ocean Data (ARCOD)

Coverage:

Median Latitude: -5.936875 * Median Longitude: 12.004187 * South-bound Latitude: -6.050000 * West-bound Longitude: 11.810000 * North-bound Latitude: -5.720000 * East-bound Longitude: 12.210000

Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.175 m

Event(s):

Vy20-3180 * Latitude: -5.750000 * Longitude: 11.817000 * Elevation: -60.0 m * Location: East Atlantic * Method/Device: Multiple investigations (MULT)

Vy20-3183 * Latitude: -6.010000 * Longitude: 12.210000 * Elevation: -545.0 m * Location: East Atlantic * Method/Device: Okean Grab (OKEAN)

Vy20-3184 * Latitude: -6.020000 * Longitude: 12.180000 * Elevation: -1130.0 m * Location: East Atlantic * Method/Device: Multiple investigations (MULT)

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	DEPTH, sediment/rock	Depth sed	m			Geocode
5	Depth, top/min	Depth top	m	Kuptsov, Vladimir M
6	Depth, bottom/max	Depth bot	m	Kuptsov, Vladimir M
7	Lead-210 activity per mass	210Pb	Bq/kg	Kuptsov, Vladimir M	Radiochemical purification and beta-counting
8	Lead-210, standard deviation	210Pb std dev	±	Kuptsov, Vladimir M	Calculated
9	Lead-210 excess	210Pb xs	Bq/kg	Kuptsov, Vladimir M	Calculated
10	Lead-210 excess, standard deviation	210Pb xs std dev	±	Kuptsov, Vladimir M	Calculated
11	Sedimentation rate per year	SR	cm/a	Kuptsov, Vladimir M	Calculated
12	Accumulation rate per year	Acc rate	g/cm²/a	Kuptsov, Vladimir M	Calculated
13	Activity, integral	Activity int	Bq/cm²	Kuptsov, Vladimir M	Beta radiometer

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

569 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Latitude	3 Longitude	4 Depth sed [m]	5 Depth top [m]	6 Depth bot [m]	7 210Pb [Bq/kg]	8 210Pb std dev [±]	9 210Pb xs [Bq/kg]	10 210Pb xs std dev [±]	11 SR [cm/a]	12 Acc rate [g/cm²/a]	13 Activity int [Bq/cm²]
Vy20-3180	-5.75	11.82	0.005	0.00	0.01	205	3	47	4
Vy20-3180	-5.75	11.82	0.015	0.01	0.02	598	7	440	8
Vy20-3180	-5.75	11.82	0.025	0.02	0.03	258	4	100	5
Vy20-3180	-5.75	11.82	0.030	0.01	0.05					0.160	0.0286	0.32
Vy20-3180	-5.75	11.82	0.035	0.03	0.04	308	5	150	6
Vy20-3180	-5.75	11.82	0.045	0.04	0.05	274	4	116	5
Vy20-3180	-5.75	11.82	0.175	0.15	0.20	158	3
Vy20-3183	-6.01	12.21	0.005	0.00	0.01	678	2	447	20
Vy20-3183	-6.01	12.21	0.015	0.01	0.02	384	9	153	10
Vy20-3183	-6.01	12.21	0.025	0.00	0.05					0.065	0.0116	0.21
Vy20-3183	-6.01	12.21	0.025	0.02	0.03	503	6	272	7
Vy20-3183	-6.01	12.21	0.035	0.03	0.04	340	8	109	8
Vy20-3183	-6.01	12.21	0.045	0.04	0.05	267	8	36	8
Vy20-3183	-6.01	12.21	0.165	0.15	0.18	231	3
Vy20-3184	-6.02	12.18	0.005	0.00	0.01	653	11
Vy20-3184	-6.02	12.18	0.015	0.01	0.02	837	12
Vy20-3184	-6.02	12.18	0.025	0.02	0.03	629	10
Vy20-3184	-6.02	12.18	0.035	0.03	0.04	728	11
Vy20-3184	-6.02	12.18	0.045	0.04	0.05	693	5
Vy20-3184	-6.02	12.18	0.130	0.12	0.14	671	5
Vy20-3185	-6.05	12.19	0.005	0.00	0.01	685	13	451	13
Vy20-3185	-6.05	12.19	0.015	0.01	0.02	526	8	294	8
Vy20-3185	-6.05	12.19	0.020	0.00	0.04					0.070	0.0125	0.22
Vy20-3185	-6.05	12.19	0.025	0.02	0.03	363	7	129	7
Vy20-3185	-6.05	12.19	0.035	0.03	0.04	318	7	84	7
Vy20-3185	-6.05	12.19	0.045	0.04	0.05	526	10	292	10
Vy20-3185	-6.05	12.19	0.135	0.12	0.15	234	2
Vy20-3186	-6.05	12.04	0.005	0.00	0.01	245	7	196	7
Vy20-3186	-6.05	12.04	0.015	0.01	0.02	303	7	254	7
Vy20-3186	-6.05	12.04	0.025	0.00	0.05					0.290	0.0520	0.46
Vy20-3186	-6.05	12.04	0.025	0.02	0.03	303	8	254	8
Vy20-3186	-6.05	12.04	0.035	0.03	0.04	285	3	236	4
Vy20-3186	-6.05	12.04	0.045	0.04	0.05	198	2	149	3
Vy20-3186	-6.05	12.04	0.125	0.10	0.15	49	2
Vy20-3187	-6.01	12.05	0.005	0.00	0.01	282	5	220	5
Vy20-3187	-6.01	12.05	0.015	0.01	0.02	281	5	219	5
Vy20-3187	-6.01	12.05	0.025	0.00	0.05					0.128	0.0230	0.23
Vy20-3187	-6.01	12.05	0.025	0.02	0.03	284	5	222	5
Vy20-3187	-6.01	12.05	0.035	0.03	0.04	209	5	147	5
Vy20-3187	-6.01	12.05	0.045	0.04	0.05	141	2	79	2
Vy20-3187	-6.01	12.05	0.125	0.10	0.15	62	1
Vy20-3188	-6.00	12.04	0.005	0.00	0.01	328	6
Vy20-3188	-6.00	12.04	0.015	0.01	0.02	296	6
Vy20-3188	-6.00	12.04	0.025	0.02	0.03	397	7
Vy20-3188	-6.00	12.04	0.035	0.03	0.04	280	2
Vy20-3188	-6.00	12.04	0.045	0.04	0.05	351	3
Vy20-3188	-6.00	12.04	0.165	0.15	0.18	398	7
Vy20-3189	-5.97	12.04	0.005	0.00	0.01	588	7	322	7
Vy20-3189	-5.97	12.04	0.015	0.01	0.02	487	7	221	7
Vy20-3189	-5.97	12.04	0.025	0.00	0.05					0.068	0.0122	0.24
Vy20-3189	-5.97	12.04	0.025	0.02	0.03	566	9	300	9
Vy20-3189	-5.97	12.04	0.035	0.03	0.04	551	8	285	8
Vy20-3189	-5.97	12.04	0.045	0.04	0.05	310	2	44	3
Vy20-3189	-5.97	12.04	0.165	0.15	0.18	266	2
Vy20-3190	-5.92	12.03	0.005	0.00	0.01	351	5	278	5
Vy20-3190	-5.92	12.03	0.015	0.01	0.02	246	4	173	5
Vy20-3190	-5.92	12.03	0.025	0.02	0.03	292	6	219	6
Vy20-3190	-5.92	12.03	0.035	0.03	0.04	297	2	224	3
Vy20-3190	-5.92	12.03	0.045	0.04	0.05	237	5	164	5
Vy20-3190	-5.92	12.03	0.165	0.15	0.18	73	2
Vy20-3191	-5.79	12.05	0.005	0.00	0.01	340	6	237	6
Vy20-3191	-5.79	12.05	0.015	0.01	0.02	294	6	191	6
Vy20-3191	-5.79	12.05	0.025	0.00	0.05					0.091	0.0163	0.16
Vy20-3191	-5.79	12.05	0.025	0.02	0.03	213	5	110	5
Vy20-3191	-5.79	12.05	0.035	0.03	0.04	182	4	79	4
Vy20-3191	-5.79	12.05	0.045	0.04	0.05	145	2	42	3
Vy20-3191	-5.79	12.05	0.165	0.15	0.18	103	2
Vy20-3192	-5.72	11.92	0.005	0.00	0.01	681	9	639	9
Vy20-3192	-5.72	11.92	0.015	0.01	0.02	494	7	452	7
Vy20-3192	-5.72	11.92	0.025	0.00	0.05					0.124	0.0223	0.54
Vy20-3192	-5.72	11.92	0.025	0.02	0.03	437	6	395	6
Vy20-3192	-5.72	11.92	0.035	0.03	0.04	442	7	400	7
Vy20-3192	-5.72	11.92	0.045	0.04	0.05	221	2	179	3
Vy20-3192	-5.72	11.92	0.175	0.15	0.20	42	2
Vy20-3193	-5.91	11.90	0.005	0.00	0.01	481	8	345	8
Vy20-3193	-5.91	11.90	0.015	0.01	0.02	309	7	173	7
Vy20-3193	-5.91	11.90	0.025	0.00	0.05					0.267	0.0479	0.41
Vy20-3193	-5.91	11.90	0.025	0.02	0.03	289	6	153	6
Vy20-3193	-5.91	11.90	0.035	0.03	0.04	301	7	165	7
Vy20-3193	-5.91	11.90	0.045	0.04	0.05	272	3	136	4
Vy20-3193	-5.91	11.90	0.150	0.12	0.18	136	2
Vy20-3194	-5.98	11.93	0.005	0.00	0.01	312	6
Vy20-3194	-5.98	11.93	0.015	0.01	0.02	262	6
Vy20-3194	-5.98	11.93	0.025	0.02	0.03	260	5
Vy20-3194	-5.98	11.93	0.035	0.03	0.04	295	6
Vy20-3194	-5.98	11.93	0.045	0.04	0.05	280	2
Vy20-3194	-5.98	11.93	0.135	0.12	0.15	281	2
Vy20-3195	-5.97	12.01	0.005	0.00	0.01	369	7	298	7
Vy20-3195	-5.97	12.01	0.015	0.01	0.02	357	6	286	6
Vy20-3195	-5.97	12.01	0.025	0.00	0.05					0.225	0.0403	0.42
Vy20-3195	-5.97	12.01	0.025	0.02	0.03	251	5	180	5
Vy20-3195	-5.97	12.01	0.035	0.03	0.04	315	5	244	5
Vy20-3195	-5.97	12.01	0.045	0.04	0.05	219	2	148	2
Vy20-3195	-5.97	12.01	0.135	0.12	0.15	71	1
Vy20-3197	-6.03	11.85	0.005	0.00	0.01	334	4	207	5
Vy20-3197	-6.03	11.85	0.015	0.01	0.02	363	4	236	5
Vy20-3197	-6.03	11.85	0.025	0.02	0.03	344	3	217	4
Vy20-3197	-6.03	11.85	0.035	0.03	0.04	477	6	350	7
Vy20-3197	-6.03	11.85	0.045	0.04	0.05	418	5	291	1
Vy20-3197	-6.03	11.85	0.175	0.15	0.20	127	3
Vy20-3199	-5.81	11.81	0.005	0.00	0.01	443	5	393	5
Vy20-3199	-5.81	11.81	0.015	0.01	0.02	297	3	247	3
Vy20-3199	-5.81	11.81	0.025	0.00	0.05					0.068	0.0122	0.22
Vy20-3199	-5.81	11.81	0.025	0.02	0.03	236	3	186	3
Vy20-3199	-5.81	11.81	0.035	0.03	0.04	208	3	158	3
Vy20-3199	-5.81	11.81	0.045	0.04	0.05	163	2	113	2
Vy20-3199	-5.81	11.81	0.165	0.15	0.18	50	1