Holocene history of the Larsen - A Ice Shelf constrained by geomagnetic paleointensity dating

Stefanie Brachfeld, Eugene Domack, Catherine Kissel, Carlo Laj, Amy Leventer, Scott Ishman, Robert Gilbert, Angelo Camerlenghi, Lorraine B. Eglinton

Research output: Contribution to journalArticleResearchpeer-review

90 Citations (Scopus)

Abstract

A sedimentary record collected from beneath the former Larsen-A Ice Shelf reveals the Holocene history of the Larsen-A region. The record begins with the transition from grounded ice to a floating ice shelf, completed by 10.7 ± 0.5 ka, and ends with the modern recession. The record contains several late Holocene diatomaceous ooze layers that suggest proximity to productive open-water events. Radiocarbon ages obtained from these sediments were complicated by the presence of detrital and reworked carbon. We have eliminated these complications and constructed a chronology for the Larsen-A Ice Shelf history via tuning of the geomagnetic field paleointensity record with a reference curve. This approach provides chronological control to sediment sequences that lack appropriate material for radiocarbon dating. Geomagnetic paleointensity features with wavelengths of 2-3 k.y. can be recognized and interhemispherically correlated, illustrating the potential to use geomagnetic paleointensity variations as a global correlation and dating tool at sub-Milankovitch time scales.

Original languageEnglish
Pages (from-to)749-752
Number of pages4
JournalGeology
Volume31
Issue number9
DOIs
StatePublished - 1 Sep 2003

Fingerprint

ice shelf
Holocene
history
floating ice
ooze
radiocarbon dating
open water
geomagnetic field
sediment
chronology
wavelength
timescale
ice
dating
carbon

Keywords

  • Antarctic Peninsula
  • Geomagnetic paleointensity
  • Holocene
  • Larsen Ice Shelf

Cite this

Brachfeld, S., Domack, E., Kissel, C., Laj, C., Leventer, A., Ishman, S., ... Eglinton, L. B. (2003). Holocene history of the Larsen - A Ice Shelf constrained by geomagnetic paleointensity dating. Geology, 31(9), 749-752. https://doi.org/10.1130/G19643.1
Brachfeld, Stefanie ; Domack, Eugene ; Kissel, Catherine ; Laj, Carlo ; Leventer, Amy ; Ishman, Scott ; Gilbert, Robert ; Camerlenghi, Angelo ; Eglinton, Lorraine B. / Holocene history of the Larsen - A Ice Shelf constrained by geomagnetic paleointensity dating. In: Geology. 2003 ; Vol. 31, No. 9. pp. 749-752.
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Brachfeld, S, Domack, E, Kissel, C, Laj, C, Leventer, A, Ishman, S, Gilbert, R, Camerlenghi, A & Eglinton, LB 2003, 'Holocene history of the Larsen - A Ice Shelf constrained by geomagnetic paleointensity dating', Geology, vol. 31, no. 9, pp. 749-752. https://doi.org/10.1130/G19643.1

Holocene history of the Larsen - A Ice Shelf constrained by geomagnetic paleointensity dating. / Brachfeld, Stefanie; Domack, Eugene; Kissel, Catherine; Laj, Carlo; Leventer, Amy; Ishman, Scott; Gilbert, Robert; Camerlenghi, Angelo; Eglinton, Lorraine B.

In: Geology, Vol. 31, No. 9, 01.09.2003, p. 749-752.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Domack, Eugene

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AU - Laj, Carlo

AU - Leventer, Amy

AU - Ishman, Scott

AU - Gilbert, Robert

AU - Camerlenghi, Angelo

AU - Eglinton, Lorraine B.

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