Citation:

odp.proc.sr.133.222.1993

Name: (Table 1) Geochemical analyses of ostracode shells from ODP Site 133-822
Creator: Thierry Corrège
Published: 1993
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1993 (exact date unknown) • DOI registered: 2012-08-03

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Abstract:

Analyses of living benthic ostracodes collected in the Coral Sea show a direct relationship between water temperature and the Mg/Ca ratio in the ostracode shells. Fossil ostracodes from Hole 822A (western edge of the Queensland Trough) were analyzed for their Mg and Ca content, and paleotemperatures are inferred using equations derived from the modern material. The bottom-water temperature record from Site 822, spanning the last 120,000 yr, indicates substantial cooling during glacial periods. It also documents important variations during an interval that is considered to correspond to isotopic stage 5. Although still preliminary, these results show that trace-element analyses of ostracode shells have a great potential for paleoceanographic studies.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: -16.423000 * Longitude: 146.215000

Date/Time Start: 1990-09-17T00:00:00 * Date/Time End: 1990-09-20T00:00:00

Minimum DEPTH, sediment/rock: 0.10 m * Maximum DEPTH, sediment/rock: 27.00 m

Event(s):

133-822 * Latitude: -16.423000 * Longitude: 146.215000 * Date/Time Start: 1990-09-17T00:00:00 * Date/Time End: 1990-09-20T00:00:00 * Elevation: -967.0 m * Penetration: 433.9 m * Recovery: 387.5 m * Location: Coral Sea * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 47 cores; 433.9 m cored; 0 m drilled; 89.3% recovery

Comment:

Sediment depth is given in mbsf. When more than one valve was analyzed in a sample, the mean Mg/Ca and the associated standard deviation were calculated. For these samples, the paleotemperature was calculated from the mean Mg/Ca.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	DEPTH, sediment/rock	Depth sed	m		Geocode
2	Sample code/label	Sample label		Corrège, Thierry
3	Magnesium cation	Mg2+	meq/l	Corrège, Thierry
4	Calcium cation	Ca2+	meq/l	Corrège, Thierry
5	Magnesium/Calcium ratio	Mg/Ca		Corrège, Thierry
6	Magnesium/Calcium ratio	Mg/Ca		Corrège, Thierry	mean
7	Magnesium/Calcium ratio, standard deviation	Mg/Ca std dev	±	Corrège, Thierry	mean
8	Temperature, calculated	T cal	°C	Corrège, Thierry

License:

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

Size:

331 data points

Data

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

1 Depth sed [m]	2 Sample label	3 Mg2+ [meq/l]	4 Ca2+ [meq/l]	5 Mg/Ca	6 Mg/Ca (mean)	7 Mg/Ca std dev [±] (mean)	8 T cal [°C]
0.10	K1A	0.000534	0.039743	0.013426	0.013082	0.000345	3.49
0.10	K1B	0.000595	0.046736	0.012737
1.00	K3A	0.000406	0.027840	0.014569	0.014569		4.18
1.50	B5A	0.001134	0.035840	0.031627	0.031180	0.002290	4.90
1.50	B5B	0.001448	0.042928	0.033734
1.50	B5C	0.001127	0.040008	0.028178
1.75	K6A	0.000911	0.066450	0.013716	0.013716		3.79
2.00	K7A	0.001277	0.111958	0.011405	0.011405		2.72
3.75	K10A	0.000608	0.052625	0.011546	0.011546		2.78
4.00	K11B	0.000745	0.059408	0.012538	0.012538		3.24
4.00	B11A	0.001138	0.040282	0.028254	0.027962	0.000292	3.73
4.00	BUB	0.001365	0.049326	0.027670
4.25	K12A	0.000975	0.058355	0.016702	0.014837	0.002446	4.31
4.25	K12B	0.000813	0.076302	0.010651
4.25	K12C	0.000645	0.039444	0.016343
4.25	K12D	0.000325	0.020793	0.015650
5.00	B13A	0.001712	0.068017	0.025168	0.025168		2.71
5.25	K14A	0.001208	0.095074	0.012701	0.012701		3.32
5.50	K15A	0.000802	0.061734	0.012990	0.012990		3.45
6.25	K16A	0.000827	0.067349	0.012274	0.015123	0.002706	4.44
6.25	K16B	0.000583	0.031074	0.018760
6.25	K16C	0.000680	0.047444	0.014335
6.50	K17A	0.000659	0.050958	0.012923	0.013239	0.000316	3.57
6.50	K17B	0.000800	0.059049	0.013555
6.50	B17A	0.002452	0.088241	0.027788	0.027788		3.66
6.75	B18A	0.001821	0.083280	0.021870	0.022012	0.000142	1.56
6.75	B18B	0.001366	0.061679	0.022153
7.50	B20A	0.002210	0.100015	0.022096	0.022230	0.000102	1.64
7.50	B20B	0.001710	0.076547	0.022343
7.50	B20C	0.002830	0.127176	0.022252
8.00	K21A	0.000836	0.078364	0.010666	0.010666		2.38
8.25	K22A	0.000592	0.055465	0.010677	0.010677		2.38
8.25	B22A	0.002691	0.098996	0.027184	0.026522	0.000662	3.20
8.25	B22B	0.003300	0.127620	0.025860
8.75	K23A	0.000481	0.029297	0.016424	0.016424		5.04
9.00	K24A	0.000600	0.039040	0.015367	0.014904	0.001071	4.34
9.00	K24B	0.000635	0.043027	0.014767
9.00	K24C	0.000802	0.060416	0.013274
9.00	K24D	0.000443	0.027311	0.016207
9.25	K25A	0.000862	0.068651	0.012557	0.012557		3.25
9.25	B25A	0.002344	0.107686	0.021768	0.021768		1.47
9.50	K26A	0.000620	0.052410	0.011829	0.011601	0.000228	2.81
9.50	K26B	0.000635	0.055869	0.011373
9.75	K27B	0.000620	0.039379	0.015743	0.015743		4.73
9.75	B27A	0.002872	0.094305	0.030450	0.030450		4.63
10.50	B29A	0.002216	0.076193	0.029086	0.029086		4.14
11.25	K31A	0.000861	0.065926	0.013053	0.013321	0.000268	3.60
11.25	K31B	0.001147	0.084438	0.013589
17.14	K41A	0.000478	0.034707	0.013775	0.013775		3.81
17.50	K42A	0.000358	0.024720	0.014473	0.014473		4.14
18.25	K44A	0.000648	0.049047	0.013206	0.012342	0.000865	3.15
18.25	K44B	0.000527	0.045957	0.011477
18.75	K45A	0.000424	0.028663	0.014796	0.014796		4.29
19.90	K46A	0.002745	0.091375	0.030042	0.030042		4.49
21.00	B47A	0.003455	0.143426	0.024086	0.024086		2.32
22.50	K48B	0.000962	0.063835	0.015075			4.42
23.50	K49A	0.000575	0.040896	0.014066	0.016134	0.002068	4.91
23.50	K50B	0.000831	0.045668	0.018202
24.00	B51A	0.001038	0.039683	0.026154	0.026154		3.07
27.00	K59A	0.000601	0.054117	0.011114	0.011114		2.58