The Pacific Equatorial Age Transect: Cenozoic Ocean and Climate History (Integrated Ocean Drilling Program Expeditions 320 & 321)

Heiko Pälike, Mitchell W. Lyle, Hiroshi Nishi, Isabella Raffi

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Integrated Ocean Drilling Program Expeditions 320 & 321, "Pacific Equatorial Age Transect" (PEAT) (Sites U1331-U1338), recovered a continuous Cenozoic record of the equatorial Pacific by coring above the paleoposition of the Equator at successive crustal ages on the Pacific plate. These sediments record the evolution of the equatorial climate system throughout most of the Cenozoic. PEAT allowed the reconstruction of extreme changes of the calcium carbonate compensation depth across major geological boundaries during the last 53. million years. The expeditions obtained a biogenic sediment archive from the early Eocene greenhouse, the Eocene cooling, the Eocene-Oligocene transition, the "one cold pole" Oligocene, the Oligocene-Miocene transition, and the middle Miocene cooling and Pliocene, including two excellent Neogene sections. Together with previous ocean drilling and seismic stratigraphy in the equatorial Pacific, the results allow a synoptic view on the climatic evolution of the Pacific. In this chapter, we summarize the results published so far, and focus on the overall aim of obtaining a Cenozoic "megasplice," which is a high-resolution record of Cenozoic climate and environmental conditions from a small set of closely related sites from the paleoequatorial Pacific.

Original languageEnglish
Title of host publicationDevelopments in Marine Geology
PublisherElsevier B.V.
Pages329-357
Number of pages29
DOIs
Publication statusPublished - 2014 Jan 1

Publication series

NameDevelopments in Marine Geology
Volume7
ISSN (Print)1572-5480

Keywords

  • Cenozoic
  • Global carbon cycle
  • Integrated bio-magneto-cyclostratigraphy
  • Integrated ocean drilling program
  • Pacific ocean

ASJC Scopus subject areas

  • Oceanography
  • Geology
  • Geochemistry and Petrology
  • Palaeontology

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