Oxygen and carbon isotopic variation in Pliocene benthic foraminifers of the equatorial Atlantic

W. B. Curry, K. G. Miller

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Large changes in benthic foraminiferal δ18O and δ13C occurred during the Pliocene (between 3.0 and 2.0 Ma) at Hole 665A. Oxygen isotopic compositions increased to maximum values at 2.4 Ma. Benthic foraminiferal δ13C values are much lower at Hole 665A than at Hole 552A, approaching the low values observed in the Pliocene Pacific Ocean. This geographic distribution of δ13C suggests that the equatorial Atlantic Ocean was dominated during the Pliocene by deep water that originated in the Southern Ocean and had chemical characteristics very similar to the Pacific Ocean. Reduced O2 values were probably associated with low δ13C values and contributed to increased preservation of organic carbon during enriched 18O intervals of the Pliocene equatorial Atlantic. -from Authors

Original languageEnglish (US)
Pages (from-to)157-166
Number of pages10
JournalUnknown Journal
DOIs
StatePublished - 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Oxygen and carbon isotopic variation in Pliocene benthic foraminifers of the equatorial Atlantic'. Together they form a unique fingerprint.

Cite this