Application of tandem accelerator mass-spectrometer dating to late pleistocene-holocene sediments of the East Antarctic continental shelf

E. W. Domack, A.J. Timothy Jull, J. B. Anderson, T. W. Linick, C. R. Williams

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Glacial recession from the Antarctic continental shelf is recorded by glacial-marine diamictons, sands, and overlying siliceous oozes. In order to clarify the chronology for this sequence, use was made of the University of Arizona tandem accelerator mass-spectrometer (TAMS) for 14C dating. Small samples of benthic and planktonic foraminifera were selectively removed from diamictons, graded sands, and surface sediments which were recovered from the Wilkes Land continental shelf and slope, East Antarctica. Organic carbon was also utilized as a source for TAMS dating of the siliceous oozes and muds. Uncorrected ages varied from 14,260 ± 140 to 3230 ± 200 yr B.P. Carbon fixed by phytoplankton and foraminifera is strongly influenced by old, glacial-derived CO2. Thus, reservoir corrections of up to 5500 yr are needed for the 14C dates. Iceberg turbation reworks foraminifera so that dates from resulting deposits (diamictons) are interpreted as maximum ages. The consistency of corrected ages from the shelf, along with the sedimentologic interpretation, suggests a rather recent recession, perhaps mid-Holocene for this portion of the East Antarctic ice sheet. Further application of the TAMS method should help clarify other problems concerning the late Quaternary glacial history of Antarctica.

Original languageEnglish (US)
Pages (from-to)277-287
Number of pages11
JournalQuaternary Research
Volume31
Issue number2
DOIs
StatePublished - 1989

Fingerprint

diamicton
continental shelf
spectrometer
Holocene
Pleistocene
foraminifera
sediment
glacial history
sand
iceberg
planktonic foraminifera
benthic foraminifera
continental slope
ice sheet
chronology
mud
organic carbon
phytoplankton
carbon
dating

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Earth-Surface Processes

Cite this

Application of tandem accelerator mass-spectrometer dating to late pleistocene-holocene sediments of the East Antarctic continental shelf. / Domack, E. W.; Jull, A.J. Timothy; Anderson, J. B.; Linick, T. W.; Williams, C. R.

In: Quaternary Research, Vol. 31, No. 2, 1989, p. 277-287.

Research output: Contribution to journalArticle

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