Summary: Deep-sea coral aragonite as a recorder for the neodymium
isotopic composition of seawater
Tina van de Flierdt a,b,
, Laura F. Robinson c
, Jess F. Adkins d
Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, Exhibition Road, London SW7 2AZ, UK
Lamont-Doherty Earth Observatory and Department of Earth and Environmental Sciences, Columbia University, 61 Route 9W,
Palisades, NY 10964, USA
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
California Institute of Technology, MS100-23, 1200 E. California Boulevard, Pasadena, CA 91125, USA
Received 15 March 2010; accepted in revised form 27 July 2010; available online 6 August 2010
Deep-sea corals have been shown to be useful archives of rapid changes in ocean chemistry during the last glacial cycle.
Their aragonitic skeleton can be absolutely dated by UTh data, freeing radiocarbon to be used as a water-mass proxy. For
certain species of deep-sea corals, the growth rate allows time resolution that is comparable to ice cores. An additional proxy
is needed to exploit this opportunity and turn radiocarbon data into rates of ocean overturning in the past.