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(Supplement Table S2) Results of 230Th/U-dating

2016

We compared the suitability of two skeletal materials of the Atlantic brain coral Diploria strigosa for 230Th/U-dating: the commonly used bulk material comprising all skeletal elements and the denser theca wall material. Eight fossil corals of presumably Last Interglacial age from Bonaire, southern Caribbean Sea, were investigated, and several sub-samples were dated from each coral. For four corals, both the ages and the activity ratios of the bulk material and theca wall agree within uncertainty. Three corals show significantly older ages for their bulk material than for their theca wall material as well as substantially elevated 232Th content and (230Th/238U) ratios. The bulk material sam…

Hand drillUranium 238Thorium 230 Uranium 238 activity ratioThorium-230/Uranium-238 activity ratioUranium-238Thorium-230/Uranium-238 activity ratio standard deviationAGECenter for Marine Environmental Sciences MARUMMulti collector inductively coupled plasma mass spectrometer MC ICP MSCenter for Marine Environmental Sciences (MARUM)Thorium 232Thorium 232 Uranium 238 activity ratioThorium-232/Uranium-238 activity ratio standard deviationEvent labelCommentUranium 234 Uranium 238 activity ratioUranium-234/Uranium-238 activity ratioDrilling/drill rigAge 230Th/U Thorium-UraniumAge standard deviationDrilling drill rigThorium-232/Uranium-238 activity ratioUranium-234/Uranium-238 activity ratio standard deviationThorium-232230Th U Thorium UraniumEarth System ResearchGroupMulti-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)standard deviation
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