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Eisele, Markus Hermann; Frank, Norbert; Wienberg, Claudia; Hebbeln, Dierk; López Correa, Matthias; Douville, Eric; Freiwald, André (2011): (Table 1) Details on the Uranium/Thorium age determinations carried out on core GeoB11569-2. PANGAEA, https://doi.org/10.1594/PANGAEA.806677, Supplement to: Eisele, MH et al. (2011): Productivity controlled cold-water coral growth periods during the last glacial off Mauritania. Marine Geology, 280(1-4), 143-149, https://doi.org/10.1016/j.margeo.2010.12.007

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Abstract:
Cold-water corals are widely distributed along the Atlantic continental margin with varying growth patterns in relation to their specific environment. Here, we investigate the long-term development of cold-water corals that once thrived on a low-latitude (17°40'N) cold-water coral mound in the Banda Mound Province off Mauritania during the last glacial-interglacial cycle. U/Th dates obtained from 20 specimens of the cold-water coral Lophelia pertusa, revealed three distinct periods of coral growth during the last glacial at 65 to 57 kyr BP, 45 to 32 kyr BP and 14 kyr BP, thus comprising the cool periods of Marine Isotopic Stages (MIS) 2-4. These coral growth periods occur during periods of increased productivity in the region, emphasizing that productivity seems to be the major steering factor for coral growth off Mauritania, which is one of the major upwelling regions in the world. This pattern differs from the well studied coral mounds off Ireland, where the current regime predominantly influences the prosperity of the cold-water corals. Moreover, coral growth off Ireland takes place during rather warm interglacial and interstadial periods, whereas off Mauritania coral growth is restricted to glacial and stadial periods. However, the on-mound sedimentation patterns off Mauritania largely resemble the observations reported from the Irish mounds. The bulk of the preserved sediments derives from periods of coral growth, whereas during periods without corals hardly any net sedimentation or mound growth took place.
Coverage:
Latitude: 17.666800 * Longitude: -16.672200
Date/Time Start: 2007-01-08T09:30:00 * Date/Time End: 2007-01-08T09:30:00
Minimum DEPTH, sediment/rock: 0.130 m * Maximum DEPTH, sediment/rock: 5.005 m
Event(s):
GeoB11569-2 (POS346_69-2) * Latitude: 17.666800 * Longitude: -16.672200 * Date/Time: 2007-01-08T09:30:00 * Elevation: -444.0 m * Location: off Mauritania * Campaign: POS346 (POS-346) * Basis: Poseidon * Method/Device: Gravity corer (GC)
Comment:
U-series ages of 20 samples of Lophelia pertusa from a gravity core obtained from the flank of a cold-water-coral mound in the Banda Mound Province on the Mauritanian slope.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Request/Laboratory codeReq/Lab codeEisele, Markus Hermann
2Sample code/labelSample labelEisele, Markus Hermann
3DEPTH, sediment/rockDepthmGeocode
4Uranium 238238Umg/kgEisele, Markus HermannICP-QMS, ThermoFisher, X-Series
5Uranium 238, standard deviation238U std dev±Eisele, Markus HermannError
6Thorium 232232Thmg/kgEisele, Markus HermannICP-QMS, ThermoFisher, X-Series
7Thorium 232, standard deviation232Th std dev±Eisele, Markus HermannError
8δ234 Uraniumδ234UEisele, Markus HermannICP-QMS, ThermoFisher, X-Seriesd234UM
9δ234 Uranium, standard deviationδ234U std dev±Eisele, Markus HermannError
10Thorium 230/Uranium 238 ratio230Th/238UEisele, Markus HermannICP-QMS, ThermoFisher, X-Series
11Thorium 230/Uranium 238, error, relative230Th/238U e%Eisele, Markus HermannICP-QMS, ThermoFisher, X-Series
12Thorium 230/Thorium 232 ratio230Th/232ThEisele, Markus HermannICP-QMS, ThermoFisher, X-Series
13Thorium 230/Thorium 232 ratio error230Th/232Th e±Eisele, Markus HermannICP-QMS, ThermoFisher, X-Series
14Age, datedAge datedkaEisele, Markus HermannAge, 230Th/U Thorium-Uranium
15Age, errorAge e±Eisele, Markus Hermann
16δ234 Uraniumδ234UEisele, Markus HermannICP-QMS, ThermoFisher, X-Seriesd234UT
17δ234 Uranium, standard deviationδ234U std dev±Eisele, Markus HermannICP-QMS, ThermoFisher, X-SeriesError
Size:
320 data points

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