TY - JOUR
T1 - Rapid, high-resolution 14C chronology of ooids
AU - Beaupré, Steven R.
AU - Roberts, Mark L.
AU - Burton, Joshua R.
AU - Summons, Roger E.
PY - 2015
Y1 - 2015
N2 - Ooids are small, spherical to ellipsoidal grains composed of concentric layers of CaCO3 that could potentially serve as biogeochemical records of the environments in which they grew. Such records, however, must be placed in the proper temporal context. Therefore, we developed a novel acidification system and employed an accelerator mass spectrometer (AMS) with a gas accepting ion source to obtain radiocarbon (14C) chronologies extending radially through ooids within one 8-h workday. The method was applied to ooids from Highborne Cay, Bahamas and Shark Bay, Australia, yielding reproducible 14C chronologies, as well as constraints on the rates and durations of ooid growth and independent estimates of local 14C reservoir ages.
AB - Ooids are small, spherical to ellipsoidal grains composed of concentric layers of CaCO3 that could potentially serve as biogeochemical records of the environments in which they grew. Such records, however, must be placed in the proper temporal context. Therefore, we developed a novel acidification system and employed an accelerator mass spectrometer (AMS) with a gas accepting ion source to obtain radiocarbon (14C) chronologies extending radially through ooids within one 8-h workday. The method was applied to ooids from Highborne Cay, Bahamas and Shark Bay, Australia, yielding reproducible 14C chronologies, as well as constraints on the rates and durations of ooid growth and independent estimates of local 14C reservoir ages.
UR - http://www.scopus.com/inward/record.url?scp=84927509842&partnerID=8YFLogxK
U2 - 10.1016/j.gca.2015.03.009
DO - 10.1016/j.gca.2015.03.009
M3 - Article
AN - SCOPUS:84927509842
VL - 159
SP - 126
EP - 138
JO - Geochimica et Cosmochimica Acta
JF - Geochimica et Cosmochimica Acta
SN - 0016-7037
ER -