Hostname: page-component-848d4c4894-nmvwc Total loading time: 0 Render date: 2024-06-25T07:15:09.817Z Has data issue: false hasContentIssue false
  • English
  • Français

Sea-Level Changes and δ18O Record for the Past 34,000 yr from Mayotte Reef, Indian Ocean

Published online by Cambridge University Press:  20 January 2017

Michel Colonna ,
Joel Casanova ,
Wolf-Christian Dullo  and
Gilbert Camoin
Michel Colonna
Affiliation:
Department of Geochemistry, BRGM, 45060, Orleans Cedex 02, France
Joel Casanova
Affiliation:
Department of Geochemistry, BRGM, 45060, Orleans Cedex 02, France
Wolf-Christian Dullo
Affiliation:
GEOMAR, Wichhofstrasse, 1-3, D-24148, Kiel, Germany
Gilbert Camoin
Affiliation:
CNRS, CEREGE, University Aix-Marseille III, France
Get access Rights & Permissions [Opens in a new window]

Abstract

New sea-level and δ18O curves for the past 34,000 yr, based on uranium–thorium chronology, are proposed for the southwestern part of the Indian Ocean. The archives include cores drilled from onshore coral reefs and submersed samples from foreslope corals of Mayotte in the Comoro Islands. The Mayotte sea-level curve shows a lowstand of 145 ± 5 m below the present level during the last glacial maximum dated at 18,400 yr. This lowstand is supported by the maximum18O enrichment in the coral colonies. The residual signal (Δδ18O), controlled by sea-surface temperature changes, indicates that surface waters 18,400 yr ago were approximately 5°C cooler than present. The deglacial sea-level rise is clearly recorded, with a mean rate of about 1.7 cm yr−1between 18,400 and 10,000 yr ago. The deglaciation phase is characterized by a strong18O depletion marked by two pulses related to meltwater discharges into the North Atlantic Ocean but also characterized by responses specific to the tropical Indian Ocean.

Type
Short Paper
Information
Quaternary Research , Volume 46 , Issue 3 , November 1996 , pp. 335 - 339
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bard, E., Hamelin, B., and Fairbanks, R. G., (1990). U–Th ages obtained by mass spectrometry in corals from Barbados: Sea-level during the past 130,000 yr. Nature 346, 456–458.Google Scholar
Chappell, J., and Shackleton, N. J., (1986). Oxygen isotopes and sea level. Nature 324, 137–140.CrossRefGoogle Scholar
Colonna, M., (1994). “Chronologie des variations du niveau marin au cours du dernier cycle climatique (0–140 000 ans B.P). dans la partie sud-occidentaledel'OcéanIndien:Implicationspaléoclimatiquesetpaléocéano-graphiques.” Unpublished Ph.D. dissertation, Provence University, France.Google Scholar
Colonna, M., (1996). Reconstitution des variations du niveau marin dans la partie sud-occidentale de l'Océan Indien dans la partie sud-occidentale de l'Océan Indien. Comptes Rendus de l'Académie des Sciences, Paris, Série II 322, 653–660.Google Scholar
Detrick, V., and Crough, V., (1978). Island subsidence, hot spots and lith-ospheric thinning. Journal of Geophysical Research 83, 1236–1244.CrossRefGoogle Scholar
Dullo, W.-Ch., Camoin, G.F., Blomeier, D., Casanova, J., Colonna, M., Eisenhauer, T., Faure, G., and Thomassin, B. A., (in press). Sea level changes and evolution of the foreslopes of Mayotte, Comoro Islands. Coral Reefs.Google Scholar
Duplessy, J.C., Bard, E., Arnold, M., Shackleton, N.J., Duprat, J., and Labeyrie, L., (1991). How fast did the ocean–atmosphere system run during the last deglaciation? Earth and Planetary Science Letters 103, 27–40.Google Scholar
Fairbanks, R. G., (1989). A 17,000-year glacio-eustatic sea-level record: Influence of glacial melting rates on the Younger Dryas event and deep-ocean circulation. Nature 342, 637–642.CrossRefGoogle Scholar
Guilderson, T.P., Fairbanks, R.G., and Rubenstone, J. L., (1994). Tropical temperature variations since 20,000 yr ago: Modulating interhemispheric climate change. Science 263, 663–665.CrossRefGoogle Scholar
Labeyrie, L.D., Duplessy, J.C., and Blanc, P. L., (1987). Variations in mode of formation and temperature of oceanic deep waters over the past 125,000 yr. Nature 327, 477–482.Google Scholar
Peltier, W. R., (1991). The ICE-3G model of late Pleistocene deglaciation: Construction, verification, and applications. In “Isostasy, Sea-Level and Mantle Rheology” (Sabadini , R., et al., Eds), NATO ASI Ser., C, pp. 95– 119.Google Scholar
Rostek, F., Ruhland, G., Bassinot, F.C., Mu¨ller, P.J., Labeyrie, L.D., Lancelot, Y., and Bard, E., (1993). Reconstructing sea surface temperature and salinity using δ18O and alkenone records. Nature 364, 319–321.Google Scholar
Weber, J.N., and Woodhead, P. M. J., (1972). Temperature dependence of oxygen-18 concentration in reef coral carbonates. Journal of Geophysical Research 77, 463–472.Google Scholar