(Table S1) Results of Nd measurements on uncleaned, mixed-planktonic foraminiera, bulk sediment leachates and detrital material ...

Combined seawater radiogenic hafnium (Hf) and neodymium (Nd) isotope compositions were extracted from bulk sediment leachates and foraminifera of Site 1088, ODP Leg 177, 2082 m water depth on the Agulhas Ridge. The new data provide a continuous reconstruction of long and short-term changes in ocean...

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Bibliographic Details
Main Authors: Dausmann, Veit, Frank, Martin, Gutjahr, Marcus, Rickli, Jörg Dominik
Format: Dataset
Language:English
Published: PANGAEA 2017
Subjects:
Sample code/label
Method comment
DEPTH, sediment/rock
AGE
Neodymium-143/Neodymium-144 ratio
Neodymium-143/Neodymium-144 ratio, standard deviation
ε-Neodymium
ε-Neodymium, standard deviation
Hafnium-176/Hafnium-177
Hafnium-176/Hafnium-177, standard deviation
ε-Hafnium
ε-Hafnium, standard deviation
Northern Component Water
Drilling/drill rig
DSDP/ODP/IODP sample designation
Leg177
Joides Resolution
Ocean Drilling Program ODP
Antarc*
Antarctic
NADW
North Atlantic Deep Water
North Atlantic
Southern Ocean
Online Access:https://dx.doi.org/10.1594/pangaea.871943
https://doi.pangaea.de/10.1594/PANGAEA.871943
Description
Summary:Combined seawater radiogenic hafnium (Hf) and neodymium (Nd) isotope compositions were extracted from bulk sediment leachates and foraminifera of Site 1088, ODP Leg 177, 2082 m water depth on the Agulhas Ridge. The new data provide a continuous reconstruction of long and short-term changes in ocean circulation and continental weathering inputs since the Mid-Miocene. Due to its intermediate water depth the sediments of this core sensitively recorded changes in admixture of North Atlantic Deep Water (NADW) to the Antarctic Circumpolar Current (ACC) as a function of the strength of the Atlantic Meridional Overturning Circulation (AMOC).Nd isotope compositions (epsilon-Nd) range from -7 to -11 with glacial values generally 1 to 3 units more radiogenic than during the interglacials of the Quaternary. The data reveal episodes of significantly increased AMOC strength during late Miocene and Pliocene warm periods whereas peak radiogenic epsilon-Nd values mark a strongly diminished AMOC during the major ... : Supplement to: Dausmann, Veit; Frank, Martin; Gutjahr, Marcus; Rickli, Jörg Dominik (2017): Glacial reduction of AMOC strength and long term transition in weathering inputs into the Southern Ocean since the Mid Miocene: Evidence from radiogenic Nd and Hf isotopes. Paleoceanography, 32(3), 265-283 ...

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