Abstract

Paired Mg/Ca and δ 18 O determinations on planktonic foraminifer shells are now widely used to isolate temperature and seawater δ 18 O influences on shell chemistry. The isolation of these influences permits the reconstruction of ocean temperature and salinity from marine sediment cores. Here we present the results of a sediment trap study conducted near the Pigmy Basin in the northern Gulf of Mexico between January and December 2010. The sediment trap is located at 27.5 N and 90.3 W in~ 1150 m of water depth and the trap is positioned at 700 m on the mooring. We analyzed the Mg/Ca and δ 18 O of the planktonic foraminifer Globigerinoides ruber (212-300μm, pink and white varieties), a surface-dwelling species often used in paleoceanographic reconstructions. Both the foraminifer Mg/Ca and δ 18 O records capture a strong seasonal signal. The foraminifer δ 18 O values range from-0.48‰ in March to-2 …

Date

January 1, 1970

Authors

D Khider, TM Quinn, C Reynolds

Journal

AGU Fall Meeting Abstracts

Volume

2012

Pages

PP43A-2008