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


Autoria(s): MacLeod, Kenneth G; Martin, Ellen E; Blair, Susanna W
Cobertura

MEDIAN LATITUDE: 16.386191 * MEDIAN LONGITUDE: -71.518793 * SOUTH-BOUND LATITUDE: 9.265800 * WEST-BOUND LONGITUDE: -168.240000 * NORTH-BOUND LATITUDE: 44.689700 * EAST-BOUND LONGITUDE: -54.199080 * DATE/TIME START: 1992-09-05T00:30:00 * DATE/TIME END: 2003-10-28T10:10:00

Data(s)

25/06/2008

Resumo

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.

Formato

application/zip, 8 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.722613

doi:10.1594/PANGAEA.722613

Idioma(s)

en

Publicador

PANGAEA

Relação

Supplementary material - Materials and methods (URI: ftp://rock.geosociety.org/pub/reposit/2008/2008208.pdf)

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: MacLeod, Kenneth G; Martin, Ellen E; Blair, Susanna W (2008): Nd isotopic excursion across Cretaceous ocean anoxic event 2 (Cenomanian-Turonian) in the tropical North Atlantic. Geology, 36(10), 811-814, doi:10.1130/G24999A.1

Palavras-Chave #115-711A; 143Nd/144Nd; 143Nd/144Nd e; 145-886C; 147Sm/144Nd; 171-1050C; 207-1258A; 207-1258B; 207-1258C; 207-1259B; 207-1260A; Age; AGE; Blake Nose, North Atlantic Ocean; d13C; delta 13C; Depth; Depth, composite; DEPTH, sediment/rock; Depth comp; DRILL; Drilling/drill rig; e-Nd(0); e-Nd(T); e-Nd std dev; epsilon-Neodymium, standard deviation; epsilon-Neodymium (0); epsilon-Neodymium (T); Instrument; Isotope ratio mass spectrometry; Joides Resolution; Leg115; Leg145; Leg171B; Leg207; modified; Neodymium 143/Neodymium 144; Neodymium 143/Neodymium 144, error; North Atlantic Ocean; North Pacific Ocean; Ocean Drilling Program; ODP; ODP sample designation; Samarium 147/Neodymium 144 ratio; Sample code/label; South Indian Ridge, South Indian Ocean; vs. VPDB
Tipo

Dataset