Citation:

odp.proc.sr.117.169.1991

Name: Uranium and strontium concentrations of ODP Hole 117-722B (Appendix B)
Published: 1991
License: https://creativecommons.org/licenses/by/3.0/

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

High resolution sampling of the upper 10 m of Hole 722B has provided information on the extent of 234U/230Th disequilibrium in Owen Ridge sediments accumulating over the last 250 k.y. High biological productivity in surface waters is sustained by seasonal upwelling driven by the Southwest Monsoon. Evidence from the Owen Ridge suggests that there has been significant variation in this productivity over the late Pleistocene, and that greater biological production occurred during interglacial episodes. The resulting organic matter flux drives a variety of redox-related reactions in the sediment, including the reduction and fixing of U. High precision measurements of U/Th trace the paleoproductivity record of enhanced organic matter input during the interglacials. Sedimentary 230Th, produced by 234U decay in the water column, is a sensitive indicator of water column scavenging by particulates, and sediment winnowing and focusing. The decay-corrected flux of excess 230Th at the Owen Ridge is substantially less than that recorded at other upwelling margins. The historical record of 230Th flux suggests that erosion and winnowing of fine sediment has occurred at the ridge site by active intermediate water circulation, and that this was most prevalent during mid isotope Stage 5 to Stage 3.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 16.621800 * Longitude: 59.795300

Date/Time Start: 1987-09-08T12:00:00 * Date/Time End: 1987-09-13T10:15:00

Minimum DEPTH, sediment/rock: 0.07 m * Maximum DEPTH, sediment/rock: 9.87 m

Event(s):

117-722B * Latitude: 16.621800 * Longitude: 59.795300 * Date/Time Start: 1987-09-08T12:00:00 * Date/Time End: 1987-09-13T10:15:00 * Elevation: -2033.0 m * Penetration: 565.6 m * Recovery: 385.8 m * Location: Arabian Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 59 cores; 565.1 m cored; 0 m drilled; 68.3 % recovery

Comment:

Corrected for salt contribution and dilution. Stratigraphy from Clemens and Prell (pers. comm., March 1989).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Shimmield, Graham	DSDP/ODP/IODP sample designation
2	DEPTH, sediment/rock	Depth sed	m			Geocode
3	AGE	Age	ka BP			Geocode
4	Uranium-238	238U	dpm/g	Shimmield, Graham
5	Uranium-238, standard deviation	238U std dev	±	Shimmield, Graham
6	Uranium-234	234U	dpm/g	Shimmield, Graham
7	Uranium-234, standard deviation	234U std dev	±	Shimmield, Graham
8	Thorium-232	232Th	dpm/g	Shimmield, Graham
9	Thorium-232, standard deviation	232Th std dev	±	Shimmield, Graham
10	Thorium-230	230Th	dpm/g	Shimmield, Graham
11	Thorium-230, standard deviation	230Th std dev	±	Shimmield, Graham

License:

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

Size:

600 data points

Data

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

1 Sample label	2 Depth sed [m]	3 Age [ka BP]	4 238U [dpm/g]	5 238U std dev [±]	6 234U [dpm/g]	7 234U std dev [±]	8 232Th [dpm/g]	9 232Th std dev [±]	10 230Th [dpm/g]	11 230Th std dev [±]
117-722B-1H-1,6-8	0.07	6.0	3.084	0.140	3.486	0.156	0.337	0.027	2.052	0.100
117-722B-1H-1,26-28	0.27	9.0	2.684	0.126	3.000	0.139	0.554	0.037	1.831	0.091
117-722B-1H-1,46-48	0.47	11.5	1.901	0.101	2.058	0.108	0.554	0.038	1.737	0.088
117-722B-1H-1,66-68	0.67	14.0	2.893	0.133	3.235	0.147	0.580	0.039	1.933	0.096
117-722B-1H-1,86-88	0.87	16.1	3.142	0.153	3.402	0.164	0.630	0.046	2.062	0.109
117-722B-1H-1,96-98	0.97	17.2	2.371	0.122	2.534	0.129	0.575	0.044	1.691	0.093
117-722B-1H-1,106-108	0.07	19.2	2.656	0.141	3.018	0.157	0.616	0.045	1.869	0.099
117-722B-1H-1,116-118	0.17	21.2	1.904	0.103	2.103	0.111	0.611	0.046	1.677	0.093
117-722B-1H-1,126-128	0.27	22.3	2.021	0.101	2.087	0.104	0.590	0.041	1.708	0.090
117-722B-1H-1,136-138	0.37	25.5	1.941	0.096	2.174	0.105	0.594	0.040	1.724	0.089
117-722B-1H-1,146-148	0.47	27.7	1.980	0.097	2.149	0.104	0.670	0.052	1.681	0.098
117-722B-1H-2,6-8	0.57	29.8	2.969	0.136	3.174	0.144	0.565	0.037	2.160	0.104
117-722B-1H-2,16-18	0.67	31.9	2.155	0.109	2.379	0.119	0.582	0.040	1.766	0.093
117-722B-1H-2,26-28	0.77	34.0	2.194	0.109	2.374	0.117	0.387	0.030	1.790	0.092
117-722B-1H-2,36-38	0.87	36.0	2.355	0.117	2.485	0.123	0.660	0.047	2.044	0.109
117-722B-1H-2,46-48	0.97	38.1	2.163	0.104	2.387	0.113	0.493	0.034	1.756	0.086
117-722B-1H-2,66-68	2.17	42.1	2.910	0.136	3.195	0.147	0.502	0.080	2.071	0.183
117-722B-1H-2,76-78	2.27	44.1	2.638	0.072	2.881	0.077	0.573	0.026	2.126	0.063
117-722B-1H-2,86-88	2.37	46.2	2.743	0.129	3.028	0.140	0.553	0.039	2.211	0.109
117-722B-1H-2,96-98	2.47	48.2	3.056	0.144	3.569	0.165	0.559	0.045	2.373	0.126
117-722B-1H-2,106-108	2.57	50.3	2.205	0.074	2.481	0.081	0.536	0.033	1.885	0.069
117-722B-1H-2,116-118	2.67	52.3	2.234	0.080	2.287	0.082	0.532	0.027	1.804	0.061
117-722B-1H-2,126-128	2.77	54.3	2.434	0.120	2.745	0.133	0.570	0.038	1.974	0.099
117-722B-1H-2,136-138	2.87	56.3	2.386	0.117	2.613	0.126	0.504	0.035	2.000	0.098
117-722B-1H-2,146-148	2.97	58.4	2.066	0.109	2.262	0.116	0.652	0.042	1.859	0.086
117-722B-1H-3,6-8	3.07	60.4	1.289	0.062	1.329	0.063	0.593	0.033	1.365	0.060
117-722B-1H-3,16-18	3.17	62.5	2.025	0.100	2.286	0.109	0.696	0.079	1.867	0.141
117-722B-1H-3,26-28	3.27	65.1	1.869	0.080	2.105	0.088	0.522	0.031	1.643	0.070
117-722B-1H-3,36-38	3.37	67.7	3.533	0.157	3.799	0.168	0.762	0.046	2.879	0.133
117-722B-1H-3,46-48	3.47	70.1	2.720	0.133	2.913	0.141	0.851	0.052	2.381	0.119
117-722B-1H-3,56-58	3.57	73.2	2.854	0.128	3.193	0.141	0.559	0.036	2.554	0.117
117-722B-1H-3,66-68	3.67	76.2	2.917	0.132	3.206	0.143	0.440	0.031	2.548	0.118
117-722B-1H-3,86-88	3.87	84.1	2.696	0.138	2.846	0.144	0.587	0.039	2.441	0.120
117-722B-1H-3,106-108	4.07	93.5	2.241	0.119	2.448	0.129	0.444	0.033	2.055	0.109
117-722B-1H-3,116-118	4.17	98.0	2.652	0.123	2.928	0.134	0.576	0.038	2.631	0.123
117-722B-1H-3,136-138	4.37	107.5	2.124	0.101	2.414	0.113	0.377	0.028	1.978	0.095
117-722B-1H-4,6-8	4.57	116.8	3.559	0.170	3.822	0.180	0.532	0.036	3.469	0.157
117-722B-1H-4,26-28	4.77	122.8	3.316	0.151	3.683	0.166	0.376	0.032	3.239	0.157
117-722B-1H-4,36-38	4.87	124.1	2.491	0.132	2.399	0.128	0.715	0.049	2.460	0.127
117-722B-1H-4,46-48	4.97	126.0	2.019	0.127	2.108	0.131	0.634	0.061	2.130	0.250
117-722B-1H-4,66-68	5.17	129.2	2.495	0.147	2.843	0.162	0.561	0.054	2.448	0.142
117-722B-2H-1,06-08	5.62	135.8	2.496	0.141	2.707	0.149	0.576	0.054	2.300	0.133
117-722B-2H-1,26-28	5.77	138.2	2.040	0.128	2.137	0.132	0.597	0.057	2.060	0.130
117-722B-2H-1,46-48	5.97	142.6	2.133	0.108	2.288	0.113	0.568	0.063	1.845	0.127
117-722B-2H-1,66-68	6.17	145.2	2.113	0.100	2.221	0.104	0.849	0.051	2.226	0.110
117-722B-2H-1,76-78	6.27	147.6	2.095	0.100	2.227	0.110	0.864	0.050	2.154	0.110
117-722B-2H-1,86-88	6.37	149.4	2.285	0.110	2.427	0.120	0.738	0.050	2.262	0.110
117-722B-2H-1,96-98	6.47	151.2	2.594	0.110	2.681	0.120	0.734	0.040	2.509	0.110
117-722B-2H-1,106-108	6.57	152.7	2.426	0.120	2.495	0.120	0.718	0.050	2.338	0.120
117-722B-2H-1,116-118	6.67	154.2	2.004	0.090	2.107	0.100	0.750	0.040	2.020	0.090
117-722B-2H-1,126-128	6.77	156.2	2.902	0.130	3.076	0.130	0.743	0.050	3.016	0.210
117-722B-2H-1,136-138	6.87	158.0	1.989	0.100	2.174	0.110	0.840	0.050	2.123	0.110
117-722B-2H-1,146-148	6.97	159.5	2.468	0.150	2.623	0.150	0.683	0.060	2.489	0.140
117-722B-2H-2,16-18	7.17	163.2	2.052	0.110	2.058	0.110	0.690	0.060	2.190	0.230
117-722B-2H-2,26-28	7.27	165.0	2.461	0.120	2.782	0.130	0.591	0.050	2.332	0.120
117-722B-2H-2,46-48	7.47	168.7	2.383	0.080	2.588	0.080	0.664	0.030	2.406	0.080
117-722B-2H-2,66-68	7.67	172.8	2.145	0.110	2.290	0.110	0.622	0.060	1.998	0.120
117-722B-2H-2,86-88	7.87	177.6	3.068	0.140	3.253	0.150	0.755	0.080	3.216	0.190
117-722B-2H-2,106-108	8.07	182.0	2.265	0.120	2.408	0.130	0.589	0.050	2.283	0.130
117-722B-2H-2,126-128	8.27	186.2	2.096	0.120	2.327	0.130
117-722B-2H-2,146-148	8.47	189.7	1.704	0.060	2.137	0.070
117-722B-2H-3,16-18	8.67	193.2	2.037	0.100	2.123	0.110
117-722B-2H-3,36-38	8.87	200.8	2.335	0.100	2.447	0.100	0.313	0.020	2.320	0.100
117-722B-2H-3,56-58	9.07	208.0	1.351	0.050	1.475	0.070	0.592	0.030	1.567	0.060
117-722B-2H-3,76-78	9.27	215.0	2.390	0.110	2.470	0.110	0.664	0.040	2.496	0.100
117-722B-2H-3,96-98	9.47	222.1	3.121	0.160	3.376	0.170	0.636	0.040	2.524	0.130
117-722B-2H-3,116-118	9.67	229.8	2.700	0.140	2.850	0.150	0.524	0.040	2.781	0.130
117-722B-2H-3,136-138	9.87	237.0	1.799	0.130	2.016	0.140	0.337	0.030	2.010	0.090