Hostname: page-component-7c8c6479df-995ml Total loading time: 0 Render date: 2024-03-28T19:28:03.539Z Has data issue: false hasContentIssue false

14C Ages of Ostracodes from Pleistocene Lake Sediments of the Western Great Basin, Usa—Results of Progressive Acid Leaching

Published online by Cambridge University Press:  18 July 2016

Irka Hajdas*
Affiliation:
PSI, ETH Hönggerberg, 8093 Zürich, Switzerland.
Georges Bonani
Affiliation:
Institut für Teilchenphysik, ETH Hönggerberg, 8093 Zürich, Switzerland.
Susan Herrgesell Zimmerman
Affiliation:
LDEO, Columbia University, New York, USA.
Millie Mendelson
Affiliation:
LDEO, Columbia University, New York, USA.
Sidney Hemming
Affiliation:
LDEO, Columbia University, New York, USA.
*
Corresponding author. Email: hajdas@phys.ethz.ch.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Progressive dissolution experiments were performed on samples of ostracode shells from lacustrine sediments from the western Great Basin to remove contamination of the surface by secondary calcite. The observed age differences between the external and residual fractions were as great as 2000 to 6000 yr. A “plateau” in ages of the last fractions was obtained only for 1 sample; however, results of repeated experiments resulted in very good agreement of the final ages. A comparison with previously published chronologies based on bulk radiocarbon ages of ostracodes from Wilson Creek (Benson et al. 1990) shows that leaching is imperative for dating samples older than 20 ka B P. This study focuses on the problem of contamination and its removal. However, the final chronology of the Wilson Creek Formation (and other late Pleistocene lacustrine sediments) will require additional dating of other sections as well as establishment of a reservoir effect correction.

Type
Articles
Copyright
Copyright © 2004 by the Arizona Board of Regents on behalf of the University of Arizona 

References

Benson, LV, Currey, DR, Dorn, RI, Lajoie, KR, Oviatt, CG, Robinson, SW, Smith, GI, Stine, S. 1990. Chronology of expansion and contraction of 4 Great Basin lake systems during the past 35,000 years. Palaeogeography Palaeoclimatology Palaeoecology 78(3–4):241–86.Google Scholar
Benson, LV, Lund, SP, Burdett, JW, Kashgarian, M, Rose, TP, Smoot, JP, Schwartz, M. 1998. Correlation of late-Pleistocene lake-level oscillations in Mono Lake, California, with North Atlantic climate events. Quaternary Research 49(1):110.CrossRefGoogle Scholar
Benson, LV, Liddicoat, JC, Smoot, J, Sarna-Wojcicki, A, Negrini, RM, Lund, S. 2003. Age of the Mono Lake excursion and associated tephra. Quaternary Science Reviews 22(2–4):135–40.CrossRefGoogle Scholar
Bonani, G, Beer, J, Hofmann, H, Synal, HA, Suter, M, Wölfli, W, Pfleiderer, C, Junghans, C, Münnich, KO. 1987. Fractionation, precision and accuracy in 14C and 13C measurements. Nuclear Instruments and Methods in Physics Research B 29:8790.CrossRefGoogle Scholar
Bond, G, Showers, W, Cheseby, M, Lotti, R, Almasi, P, de-Menocal, P, Priore, P, Cullen, H, Hajdas, I, Bonani, G. 1997. A pervasive millennial-scale cycle in North Atlantic Holocene and glacial climates. Science 278(5341):1257–66.CrossRefGoogle Scholar
Broecker, WS, Orr, PC. 1958. Radiocarbon chronology of Lake Lahontan and Lake Bonneville. Geological Society of America Bulletin 69(8):1009–32.CrossRefGoogle Scholar
Broecker, WS, Walton, A. 1959. The geochemistry of C-14 in freshwater systems. Geochimica et Cosmochimica Acta 16(1–3):1538.CrossRefGoogle Scholar
Broecker, WS, Wanninkhof, R, Mathieu, G, Peng, TH, Stine, S, Robinson, S, Herczeg, A, Stuiver, M. 1988. The radiocarbon budget for Mono Lake—an unsolved mystery. Earth and Planetary Science Letters 88(1–2):1626.Google Scholar
Burr, GS, Edwards, RL, Donahue, DJ, Druffel, ERM, Taylor, FW. 1992. Mass spectrometric 14C and U-Th measurements in coral. Radiocarbon 34(3):611–8.Google Scholar
Kent, DV, Hemming, SR, Turrin, BD. 2002. Laschamp excursion at Mono Lake? Earth and Planetary Science Letters 197(3–4):151–64.Google Scholar
Libby, WF. 1955. Radiocarbon Dating. Chicago: University Chicago Press. 175 p.Google Scholar
Liddicoat, JC, Coe, RS. 1979. Mono Lake Geomagnetic Excursion. Journal of Geophysical Research 84(NB1):261–71.Google Scholar
Liddicoat, JC. 1996. Mono Lake Excursion in the Lahontan Basin, Nevada. Geophysical Journal International 125(2):630–5.CrossRefGoogle Scholar
Lin, JC, Broecker, WS, Hemming, SR, Hajdas, I, Anderson, RF, Smith, GI, Kelley, M, Bonani, G. 1998. A reassessment of U-Th and C-14 ages for late-glacial high-frequency hydrological events at Searles Lake, California. Quaternary Research 49(1):1123.Google Scholar
Stuiver, M, Polach, HA. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.Google Scholar
Vogel, JS, Southon, JR, Nelson, DE, Brown, TA. 1984. Performance of catalytically condensed carbon for use in accelerator mass spectrometry. Nuclear Instruments and Methods in Physics Research B 5:289–93.Google Scholar