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Bibliographic Details
Main Authors: Sano, Sakae, Hayasaka, Yasutaka
Format: Dataset Open Access
Language:en
Published: PANGAEA 2004
Subjects:
191-1179D; Barium; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Estimated; Joides Resolution; Leg191; Mass spectrometer Finnigan MAT 262; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; North Pacific Ocean; Ocean Drilling Program; ODP; Potassium oxide; Rubidium; Sample code/label; Strontium; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error; ε-Neodymium
Online Access:https://doi.org/10.1594/PANGAEA.779490
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Table of Contents:
  • Sr and Nd isotopic compositions of 19 basalts from Hole 1179D, Leg 191 were analyzed to determine ridge and plume interaction. 87Sr/86Sr and 143Nd/144Nd ratios of the basalts ranged from 0.7029 to 0.7040 and from 0.5131 to 0.5132 (epsilon Nd0 = 9.3 ~ 10.8), respectively. Calculated initial isotopic compositions at 129 Ma, the age of magnetic Anomaly M8, are 87Sr/86Sri = 0.7026 ~ 0.7033 and epsilon NdT = 9.2 ~ 10.6. The initial Sr isotope ratio is higher than that of normal mid-ocean-ridge basalts (MORBs) from the East Pacific Rise and Mesozoic MORBs. They are similar to those of the Shatsky Rise, suggesting a plume component was involved in the formation.

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