Data Description

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Citation:
Raitzsch, M et al. (2011): (Table 1) Elemental composition of benthic foraminifera from South Atlantic core top samples. Unpublished dataset #762797,
Supplement to: Raitzsch, Markus; Kuhnert, Henning; Hathorne, Ed C; Groeneveld, Jeroen; Bickert, Torsten (2011): U/Ca in benthic foraminifers: A proxy for the deep-sea carbonate saturation. Geochemistry Geophysics Geosystems, 12(6), doi:10.1029/2010GC003344
Abstract:
The ocean plays a major role in the global carbon cycle, and attempts to reconstruct past changes in the marine carbonate system are increasing. The speciation of dissolved uranium is sensitive to variations in carbonate system parameters, and previous studies have shown that this is recorded in the uranium-to-calcium ratio (U/Ca) of the calcite shells of planktonic foraminifera. Here we test whether U/Ca ratios of deep-sea benthic foraminifera are equally suited as an indicator of the carbonate system. We compare U/Ca in two common benthic foraminifer species (Planulina wuellerstorfi and Cibicidoides mundulus) from South Atlantic core top samples with the calcite saturation state (Delta [CO3**2-] = [CO3**2-]in situ - [CO3**2-]sat) of the ambient seawater and find significant negative correlations for both species. Compared with planktonic foraminifera, the sensitivity of U/Ca in benthic foraminifera to changes in Delta [CO3**2-] is about 1 order of magnitude higher. Although Delta [CO3**2-] exerts the dominant control on the average foraminiferal U/Ca, the intertest and intratest variability indicates the presence of additional factors forcing U/Ca.
Project(s):
Center for Marine Environmental Sciences (MARUM) *
Coverage:
Median Latitude: -29.611049 * Median Longitude: -24.916945 * South-bound Latitude: -48.013333 * West-bound Longitude: -58.518200 * North-bound Latitude: -1.665000 * East-bound Longitude: 13.828333
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 0.0 m
Event(s):
GeoB1041-1 * * Latitude: -3.480000 * Longitude: -7.591667 * Date/Time: 1988-03-12T00:00:00 * Elevation: -4035.0 m * Penetration: 0.42 m * Location: Walvis Ridge * * Campaign: M6/6 * * Basis: Meteor (1986) * * Device: Giant box corer * * Comment: Karb.-schl., Forams
GeoB1105-3 * * Latitude: -1.665000 * Longitude: -12.428330 * Date/Time: 1989-01-26T00:00:00 * Elevation: -3231.0 m * Recovery: 0.32 m * Penetration: 0.36 m * Location: Equatorial Atlantic * * Campaign: M9/4 * * Basis: Meteor (1986) * * Device: Giant box corer * * Comment: Karbonatschlamm
GeoB1118-2 * * Latitude: -3.560000 * Longitude: -16.431667 * Date/Time: 1989-01-07T00:00:00 * Elevation: -4675.0 m * Recovery: 0.47 m * Penetration: 0.48 m * Location: Brazil Basin * * Campaign: M9/4 * * Basis: Meteor (1986) * * Device: Giant box corer * * Comment: Karbonatschlamm, Foram.
+
Comment:
standard deviation=standard error of the mean.
Partition coefficient DU = (U/Cashell)/(U/Caseawater) using a U/Caseawater = 1390 nmol/mol [Ku et al., 1977].
*Outlier not used in regressions.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventMetadata
2LATITUDE *LatitudeGeocode
3LONGITUDE *LongitudeGeocode
4Elevation of eventElevationmMetadata
5DEPTH, sediment/rock *DepthmGeocode
6Depth, top/min *Depth topmRaitzsch, Markus *
7Depth, bottom/max *Depth botmRaitzsch, Markus *
8Carbonate ion concentration *CO3**2-µmol/kgRaitzsch, Markus *
9delta carbonate ion content *dCO3**2-µmol/kgRaitzsch, Markus *Calculated from WOCE, using the equation of Jansen et al. 2002 *
10Planulina wuellerstorfi, Uranium/Calcium ratio *P. wuellerstorfi U/Canmol/molRaitzsch, Markus *see reference(s) *
11Planulina wuellerstorfi, Uranium/Calcium ratio, standard deviation *P. wuellerstorfi U/Ca std dev±Raitzsch, Markus *
12Planulina wuellerstorfi, partition coefficient *P. wuellerstorf, DURaitzsch, Markus *see comment *
13Planulina wuellerstorfi, Manganese/Calcium ratio *P. wuellerstorfi Mn/Caµmol/molRaitzsch, Markus *see reference(s) *
14Planulina wuellerstorfi, Manganese/Calcium ratio, standard deviation *P. wuellerstorfi Mn/Ca std dev±Raitzsch, Markus *
15Planulina wuellerstorfi, Aluminium/Calcium ratio *P. wuellerstorfi Al/Caµmol/molRaitzsch, Markus *see reference(s) *
16Planulina wuellerstorfi, Aluminium/Calcium ratio, standard deviation *P. wuellerstorfi Al/Ca std dev±Raitzsch, Markus *
17Cibicidoides mundulus, Uranium/Calcium ratio *C. mundulus U/Canmol/molRaitzsch, Markus *see reference(s) *
18Cibicidoides mundulus, Uranium/Calcium ratio, standard deviation *C. mundulus U/Ca std dev±Raitzsch, Markus *
19Cibicidoides mundulus, partition coefficient *C. mundulus, DURaitzsch, Markus *see comment *
20Cibicidoides mundulus, Manganese/Calcium ratio *C. mundulus Mn/Caµmol/molRaitzsch, Markus *see reference(s) *
21Cibicidoides mundulus, Manganese/Calcium ratio, standard deviation *C. mundulus Mn/Ca std dev±Raitzsch, Markus *
22Cibicidoides mundulus, Aluminium/Calcium ratio *C. mundulus Al/Caµmol/molRaitzsch, Markus *see reference(s) *
23Cibicidoides mundulus, Aluminium/Calcium ratio, standard deviation *C. mundulus Al/Ca std dev±Raitzsch, Markus *
Size:
337 data points

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