The glacial-interglacial variation of seawater osmium isotopes as recorded in Santa Barbara Basin

Gwyneth Gordon, K. K. Turekian

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The Pleistocene deposits of Santa Barbara Basin (SBB) show laminations during interglacial periods typical of an anoxic or suboxic depositional environment and more sporadically laminated deposits during glacial times, indicating a more oxic environment of deposition. The 187Os/188Os value of sediment leaches varies as a function of climate, consistent with a more radiogenic Os signal during interglacial times and less radiogenic Os values more typical of glacial times. The signal is confounded by contributions from a high Os detrital component with a variable 187Os/188Os value, but generally agrees with prior result from deposits from other marine environments.

Original languageEnglish (US)
Pages (from-to)379-389
Number of pages11
JournalEarth and Planetary Science Letters
Volume228
Issue number3-4
DOIs
StatePublished - Dec 15 2004

Keywords

  • Glacial-interglacial climate change
  • Os/Os
  • Paleoclimate
  • Santa Barbara Basin
  • Varved sediment

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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