Nd, Sm and carbon isotopic data for samples from ODP Legs 115, 145, 171, and 207

Late Cretaceous fish debris from Demerara Rise exhibits a dramatic positive excursion of 8 e-Nd units during ocean anoxic event 2 (OAE2) that is superimposed on extremely low e-Nd(t) values (-14 to -16.5) observed throughout the rest of the studied interval. The OAE2 e-Nd excursion is the largest ye...

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Bibliographic Details
Main Authors: MacLeod, Kenneth G, Martin, Ellen E, Blair, Susanna W
Format: Dataset
Language:English
Published: PANGAEA 2008
Subjects:
115-711A
145-886C
171-1050C
207-1258A
207-1258B
207-1258C
207-1259B
207-1260A
Blake Nose
North Atlantic Ocean
DRILL
Drilling/drill rig
Joides Resolution
Leg115
Leg145
Leg171B
Leg207
North Pacific Ocean
Ocean Drilling Program
ODP
South Indian Ridge
South Indian Ocean
Pacific
Indian
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.722613
https://doi.org/10.1594/PANGAEA.722613
Description
Summary:Late Cretaceous fish debris from Demerara Rise exhibits a dramatic positive excursion of 8 e-Nd units during ocean anoxic event 2 (OAE2) that is superimposed on extremely low e-Nd(t) values (-14 to -16.5) observed throughout the rest of the studied interval. The OAE2 e-Nd excursion is the largest yet documented in marine sediments, and the majority of the shift is estimated to have occurred over <20 k.y. Low background e-Nd values on Demerara Rise are explained as the Nd isotopic signature of the South American craton, whereas eruptions of the Caribbean large igneous province or enhanced mixing of intermediate waters in the North Atlantic could have caused the excursion.

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