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Hathorne, Ed; Felis, Thomas; James, Rachael H; Thomas, Alexander L (2011): Geochemical data for drilled powder samples from two fossil Porites corals from Integrated Ocean Drilling Program Expedition 310. doi:10.1594/PANGAEA.756560,
Supplement to: Hathorne, E et al. (2011): Laser ablation ICP-MS screening of corals for diagenetically affected areas applied to Tahiti corals from the last deglaciation. Geochimica et Cosmochimica Acta, 75, 1490-1506, doi:10.1016/j.gca.2010.12.011

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Abstract:
Fossil corals are unique archives of past seasonal climate variability, providing vital information about seasonal climate phenomena such as ENSO and monsoons. However, submarine diagenetic processes can potentially obscure the original climate signals and lead to false interpretations. Here we demonstrate the potential of laser ablation ICP-MS to rapidly detect secondary aragonite precipitates in fossil Porites colonies recovered by Integrated Ocean Drilling Program (IODP) Expedition 310 from submerged deglacial reefs off Tahiti. High resolution (100 µm) measurements of coralline B/Ca, Mg/Ca, S/Ca, and U/Ca ratios are used to distinguish areas of pristine skeleton from those afflicted with secondary aragonite. Measurements of coralline Sr/Ca, U/Ca and oxygen isotope ratios, from areas identified as pristine, reveal that the seasonal range of sea surface temperature in the tropical south Pacific during the last deglaciation (14.7 and 11 ka) was similar to that of today.
Coverage:
Median Latitude: -17.626935 * Median Longitude: -149.477640 * South-bound Latitude: -17.765770 * West-bound Longitude: -149.551130 * North-bound Latitude: -17.488100 * East-bound Longitude: -149.404150
Date/Time Start: 2005-10-15T10:35:00 * Date/Time End: 2005-11-15T00:43:00
Minimum DISTANCE: 0.250 cm * Maximum DISTANCE: 11.775 cm
Event(s):
310-M0007B (TAH-03A-3A) * Latitude: -17.765770 * Longitude: -149.551130 * Date/Time Start: 2005-10-15T10:35:00 * Date/Time End: 2005-10-16T05:34:00 * Elevation: -41.6 m * Penetration: 48.23 m * Recovery: 27.02 m * Location: Tahiti, offshore Maraa * Campaign: Exp310 (Tahiti Sea Level) * Basis: DP Hunter * Device: Drilling/drill rig (DRILL) * Comment: Coordinate system: WGS84, Time zone: UTC -10
310-M0025B (TAH-02A-5H) * Latitude: -17.488100 * Longitude: -149.404150 * Date/Time Start: 2005-11-14T13:58:00 * Date/Time End: 2005-11-15T00:43:00 * Elevation: -100.8 m * Penetration: 20.5 m * Recovery: 13.81 m * Location: Tahiti, offshore Tiarei * Campaign: Exp310 (Tahiti Sea Level) * Basis: DP Hunter * Device: Drilling/drill rig (DRILL) * Comment: Coordinate system: WGS84, Time zone: UTC -10
Comment:
The corals were sampled from the top (youngest) part to the bottom (oldest) part [DISTANCE]
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Sample code/labelLabelHathorne, EdODP sample designationIODP sample label
3Sample code/label 2Label 2Hathorne, EdLaboratory label
4DISTANCEDistancecmGeocode
5Boron/Calcium ratioB/Caµmol/molHathorne, EdICP-MS, Inductively coupled plasma - mass spectrometry
6Magnesium/Calcium ratioMg/Cammol/molHathorne, EdICP-MS, Inductively coupled plasma - mass spectrometry
7Manganese/Calcium ratioMn/Cammol/molHathorne, EdICP-MS, Inductively coupled plasma - mass spectrometry
8Strontium/Calcium ratioSr/Cammol/molHathorne, EdICP-MS, Inductively coupled plasma - mass spectrometry
9Uranium/Calcium ratioU/Caµmol/molHathorne, EdICP-MS, Inductively coupled plasma - mass spectrometry
10delta 13C, skeletal carbonated13C skel carbper mil PDBHathorne, EdMass spectrometry
11delta 18O, skeletal carbonated18O skel carbper mil PDBHathorne, EdMass spectrometry
Size:
1038 data points

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