Journal article
Using the 14C bomb pulse to date young speleothems
E Hodge, J McDonald, M Fischer, D Redwood, Q Hual, V Levchenko, R Drysdale, C Waring, D Fink
Radiocarbon | Published : 2011
Abstract
Three modern speleothems were sampled at high resolution for radiocarbon analysis to identify their bombpulse signatures and to construct chronologies. Each speleothem exhibited a different 14C response, presumed to be related to site characteristics such as vegetation, temperature, rainfall, depth below the surface, and water pathway through the aquifer. Peak 14C activity for WM4 is 134.1 pMC, the highest cited thus far in the literature and suggestive of a lower inertia at this site. Dead carbon fractions for each stalagmite were calculated and found to be relatively similar for the 3 speleothems and lower than those derived from Northern Hemisphere speleothems. An inverse modeling techniq..
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Awarded by Australian Institute of Nuclear Science and Engineering (AINSE)
Funding Acknowledgements
We thank DECCW, Jenolan Caves Trust, and National Parks for permission to collect the speleothems, accommodation, and field support. The authors thank other members of the AMS group, Australian Nuclear Science and Technology Organisation (ANSTO) for helping with sample preparation and <SUP>14</SUP>C measurement. We gratefully acknowledge funding from the Australian Institute of Nuclear Science and Engineering (AINSE) for high-precision AMS 14C measurements (Grant 06/054 and AINSTU1007), ANSTO's Cosmogenic climate Archives of the Southern Hemisphere (CcASH) Project, the Sydney Catchment Authority, and the Australian Research Council.