Rapid radiocarbon (14C) analysis of coral and carbonate samples using a continuous-flow accelerator mass spectrometry (CFAMS) system
Table S1: The data from the initial survey of 18 benthic corals from the Drake Passage in the southern Atlantic Ocean and 2 from the New England Seamounts in the northern Atlantic Ocean. (6.794Kb)
Table S2: The data for the repeat triplicate analysis of 5 selected coral from the initial survey and a standard. (6.575Kb)
McIntyre, Cameron P.
Roberts, Mark L.
Burton, Joshua R.
McNichol, Ann P.
Robinson, Laura F.
von Reden, Karl F.
Jenkins, William J.
MetadataShow full item record
Radiocarbon analyses of carbonate materials provide critical information for understanding the last glacial cycle, recent climate history and paleoceanography. Methods that reduce the time and cost of radiocarbon (14C) analysis are highly desirable for large sample sets and reconnaissance type studies. We have developed a method for rapid radiocarbon analysis of carbonates using a novel continuous-flow accelerator mass spectrometry (CFAMS) system. We analyzed a suite of deep-sea coral samples and compared the results with those obtained using a conventional AMS system. Measurement uncertainty is <0.02 Fm or 160 Ryr for a modern sample and the mean background was 37,800 Ryr. Radiocarbon values were repeatable and in good agreement with those from the conventional AMS system. Sample handling and preparation is relatively simple and the method offered a significant increase in speed and cost effectiveness. We applied the method to coral samples from the Eastern Pacific Ocean to obtain an age distribution and identify samples for further analysis. This paper is intended to update the paleoceanographic community on the status of this new method and demonstrate its feasibility as a choice for rapid and affordable radiocarbon analysis.
Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 26 (2011): PA4212, doi:10.1029/2011PA002174.
Showing items related by title, author, creator and subject.
Comment on "Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th/234U/238U and 14C dates on pristine corals" by R.G. Fairbanks et al. (Quaternary Science Reviews 24 (2005) 1781-1796), and "Extending the radiocarbon calibration beyond 26,000 years before present using fossil corals" by T.-C. Chiu et al. (Quaternary Science Reviews 24 (2005) 1797-1808). Reimer, Paula J.; Baillie, Mike G. L.; Bard, Edouard; Beck, J. Warren; Blackwell, Paul G.; Buck, Caitlin E.; Burr, George S.; Edwards, R. Lawrence; Friedrich, Michael; Guilderson, Thomas P.; Hogg, Alan G.; Hughen, Konrad A.; Kromer, Bernd; McCormac, Gerry; Manning, Sturt; Reimer, Ron W.; Southon, John R.; Stuiver, Minze; van der Plicht, Johannes; Weyhenmeyer, Constanze E. (2006-02)A recently published radiocarbon calibration curve extending to 50,000 cal BP (Fairbanks et al. 2005) is purportedly superior to that generated by the IntCal working group beyond the end of the tree-ring data at 12,400 ...
Constraining circulation changes through the last deglaciation with deep-sea coral radiocarbon and sedimentary 231Pa/230Th Burke, Andrea (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-02)Radioactive isotopes can be used in paleoceanography both for dating samples and as tracers of ocean processes. Here I use radiocarbon and uranium series isotopes to investigate the ocean’s role in climate change over ...
Mollenhauer, Gesine; Montlucon, Daniel B.; Eglinton, Timothy I. (Dept. of Geosciences, University of Arizona, 2005)We evaluate potential process blanks associated with radiocarbon measurement of microgram to milligram quantities of alkenones at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. Two strategies to ...