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Anomalous Radiocarbon Ages Found in Campanian Ignimbrite Deposit of the Mediterranean Deep-Sea Core CT85-5

Published online by Cambridge University Press:  18 July 2016

Irka Hajdas ,
Carla Taricco ,
Georges Bonani ,
Jürg Beer ,
Stefano M Bernasconi  and
Lukas Wacker
Irka Hajdas*
Affiliation:
Laboratory of Ion Beam Physics, ETH, Schafmattstrassc 20, 8093 Zürich, Switzerland.
Carla Taricco
Affiliation:
Department of Physics, University of Turin and IFSI-INAF, Turin, Italy.
Georges Bonani
Affiliation:
Laboratory of Ion Beam Physics, ETH, Schafmattstrassc 20, 8093 Zürich, Switzerland.
Jürg Beer
Affiliation:
Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland.
Stefano M Bernasconi
Affiliation:
Department of Geology, ETH, Sonneggstrasse 5, 8092 Zürich, Switzerland.
Lukas Wacker
Affiliation:
Laboratory of Ion Beam Physics, ETH, Schafmattstrassc 20, 8093 Zürich, Switzerland.
*
Corresponding author. Email: hajdas@phys.ethz.ch.
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Abstract

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A detailed radiocarbon chronology has been established for the deep-sea core CT85-5 from the Tyrrhenian Sea. This chronology, which is based on the analysis of foraminifera shells, shows a set of reversed 14C ages for sediments deposited during the eruption of the Campanian Ignimbrite (∼40 ka cal BP). The anomalous young 14C ages coincide with elevated concentrations of 10Bc measured in the same core. Although reversals in 14C ages have been previously found in other records at 40 ka cal BP, such extreme changes have not been observed elsewhere. The enhancement in 14C concentration in CT85-5 sediments associated with the Campanian Ignimbrite is equivalent to an apparent age ∼15 ka younger than the age for the sediments deposited shortly before the eruption. Here, we present consistent results of repeated measurements showing no analytical problems that can explain the observed rapid changes in 14C of this particular record.

Type
Articles
Information
Radiocarbon , Volume 53 , Issue 4 , 2011 , pp. 575 - 583
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona 

References

Alessio, M, Bella, F, Improta, S, Belluomini, G, Cortesi, C, Turi, B. 1973. University of Rome carbon-14 dates X. Radiocarbon 15(1): 165–78.Google Scholar
Alessio, M, Bella, F, Improta, S, Belluomini, G, Calderoni, G, Cortesi, C, Turi, B. 1974. University of Rome carbon-14 dates XII. Radiocarbon 16(3):358–67.CrossRefGoogle Scholar
Barberi, F, Innocenti, F, Lirer, L, Munno, R, Santacroce, R. 1978. The Campanian Ignimbrite: a major prehistoric eruption in the Neapolitan area (Italy). Bulletin of Volcanology 41(1):10–31.CrossRefGoogle Scholar
Baumgartner, S, Beer, J, Masarik, J, Wagner, G, Meynadier, L, Synal, H-A. 1998. Geomagnetic modulation of the 36Cl flux in the GRIP ice core, Greenland. Science 279(5355):1330–2.Google Scholar
Bonani, G, Beer, J, Hofmann, H, Synal, H-A, 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(1–2):87–90.Google Scholar
Bonhommet, N, Zähringer, J. 1969. Paleomagnetism and potassium argon age determinations of the Laschamp geomagnetic polarity event. Earth and Planetary Science Letters 6(1):43–6.Google Scholar
Castagnoli, GC, Bonino, G, Provenzale, A, Serio, M, Callegari, E. 1992. The CaCO3 profiles of deep and shallow Mediterranean Sea cores as indicators of past solarterrestrial relationships. Nuovo Cimento della Societa Italiana di Fisica C-Geophysics and Space Physics 15(5):547–63.Google Scholar
Castagnoli, GC, Albrecht, A, Beer, J, Bonino, G, Shen, C, Callegari, E, Taricco, C, Dittrich-Hannen, B, Kubik, P, Suter, M, Zhu, GM. 1995. Evidence for enhanced 10Be deposition in Mediterranean sediments 35 kyr BP. Geophysical Research Letters 22(6):707–10.CrossRefGoogle Scholar
Castagnoli, GC, Bonino, G, Taricco, C, Lehman, B. 1998. Cosmogenic isotopes and geomagnetic signals in a Mediterranean sea sediment at 35 000 y BP. Nuovo Cimento della Societa Italiana di Fisica C-Geophysics and Space Physics 21(2):243–6.Google Scholar
De Vivo, B, Rolandi, G, Gans, PB, Calvert, A, Bohrson, WA, Spera, FJ, Belkin, HE. 2001. New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy). Mineralogy and Petrology 73(1–3):47–65.Google Scholar
Giaccio, B, Hajdas, I, Peresani, M, Fedele, FG, Isaia, R. 2006. The Campanian Ignimbrite tephra and its relevance for the timing of the Middle to Upper Palaeolithic shift. In: Conard, NJ, editor. When Neanderthals and Modern Humans Met. Tübingen: Kerns Verlag. p 343–75.Google Scholar
Hajdas, I, Bonani, G, Hergessell Zimmerman, S, Mendelson, M, Hemming, S. 2004a. 14C ages of ostracodes from Pleistocene lake sediments of the Western Great Basin, USA—results of progressive acid leaching. Radiocarbon 46(1):189–200.CrossRefGoogle Scholar
Hajdas, I, Bonani, G, Thut, J, Leone, G, Pfenninger, R, Maden, C. 2004b. A report on sample preparation at the ETH/PSI AMS facility in Zurich. Nuclear Instruments and Methods in Physics Research B 223–224:267–71.Google Scholar
Hughen, K, Lehman, S, Southon, J, Overpeck, J, Marchal, O, Herring, C, Turnbull, J. 2004. 14C activity and global carbon cycle changes over the past 50,000 years. Science 303(5655):202–7.Google Scholar
Laj, C, Kissel, C, Mazaud, A, Channell, JET, Beer, J. 2000. North Atlantic palaeointensity stack since 75 ka (NAPIS-75) and the duration of the Laschamp event. Philosophical Transactions of the Royal Society of London Series A 358(1768):1009–25.Google Scholar
Laj, C, Kissel, C, Mazaud, A, Michel, E, Muscheler, R, Beer, J. 2002. Geomagnetic field intensity, North Atlantic Deep Water circulation and atmospheric Δ14C during the last 50 kyr. Earth and Planetary Science Letters 200(1–2):177–90.Google Scholar
McHargue, LR, Damon, PE, Donahue, DJ. 1995. Enhanced cosmic-ray production of 10Be coincident with the Mono Lake and Laschamp geomagnetic excursions. Geophysical Research Letters 22(5):659–62.Google Scholar
McHargue, LR, Donahue, D, Damon, PE, Sonett, CP, Biddulph, D, Burr, G. 2000. Geomagnetic modulation of the late Pleistocene cosmic-ray flux as determined by 10Be from Blake Outer Ridge marine sediments. Nuclear Instruments and Methods in Physics Research B 172(1–4):555–61.Google Scholar
Nowaczyk, NR, Antonow, M, Knies, J, Spielhagen, RF. 2003. Further rock magnetic and chronostratigraphic results on reversal excursions during the last 50 ka as derived from northern high latitudes and discrepancies in precise AMS 14C dating. Geophysical Journal International 155(3):1065–80.Google Scholar
Oeschger, H, Siegenthaler, U, Schotterer, U, Gugelmann, A. 1975. A box diffusion model to study carbon dioxide exchange in nature. Tellus 27(2):168–92.Google Scholar
Paterne, M, Kallel, N, Labeyrie, L, Vautravers, M, Duplessy, J-C, Rossignol-Strick, M, Cortijo, E, Arnold, M, Fontugne, M. 1999. Hydrological relationship between the North Atlantic Ocean and the Mediterranean Sea during the past 15–75 kyr. Paleoceanography 14(5):626–38.CrossRefGoogle Scholar
Raisbeck, GM, Yiou, F, Bourles, D, Lorius, C, Jouzel, J, Barkov, NI. 1987. Evidence for 2 intervals of enhanced 10Be deposition in Antarctic Ice during the Last Glacial period. Nature 326(6110):273–7.Google Scholar
Reimer, PJ, Brown, TA, Reimer, RW. 2004. Discussion: reporting and calibration of post-bomb 14C data. Radiocarbon 46(3):1299–304.Google Scholar
Reimer, PJ, Baillie, MGL, Bard, E, Bayliss, A, Beck, JW, Blackwell, PG, Bronk Ramsey, C, Buck, CE, Burr, GS, Edwards, RL, Friedrich, M, Grootes, PM, Guilderson, TP, Hajdas, I, Heaton, TJ, Hogg, AG, Hughen, KA, Kaiser, KF, Kromer, B, McCormac, FG, Manning, SW, Reimer, RW, Richards, DA, Southon, JR, Talamo, S, Turney, CSM, van der Plicht, J, Weyhenmeyer, CE. 2009. IntCal09 and Marine09 radiocarbon age calibration curves, 0–50,000 years cal BP. Radiocarbon 51(4):1111–50.Google Scholar
Robinson, C, Raisbeck, GM, Yiou, F, Lehman, B, Laj, C. 1995. The relationship between 10Be and geomagnetic field strength records in central North Atlantic sediments during the last 80 ka. Earth and Planetary Science Letters 136(3–4):551–7.Google Scholar
Singer, BS, Guillou, H, Jicha, BR, Laj, C, Kissel, C, Beard, BL, Johnson, CM. 2009. 40Ar/39Ar, K-Ar and 230Th-238U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies. Earth and Planetary Science Letters 286(1–2):80–8.CrossRefGoogle Scholar
Synal, H-A, Stocker, M, Suter, M. 2007. MICADAS: a new compact radiocarbon AMS system. Nuclear Instruments and Methods in Physics Research B 259(1):7–13.Google Scholar
Ton-That, T, Singer, B, Paterne, M. 2001. 40Ar/39Ar dating of latest Pleistocene (41 ka) marine tephra in the Mediterranean Sea: implications for global climate records. Earth and Planetary Science Letters 184(3–4):645–58.Google Scholar
Valet, J-P, Plenier, G, Guérin, G, Lefèvre, JC, LeGoff, M, Carter-Stiglitz, B. 2007. Origin and age of the directions recorded during the Laschamp event in the Chaîne des Puys (France). Earth and Planetary Science Letters 259(3–4):414–31.Google Scholar
Voelker, AHL, Grootes, PM, Nadeau, M-J, Sarnthein, M. 2000. Radiocarbon levels in the Iceland Sea from 25–53 kyr and their link to the earth's magnetic field intensity. Radiocarbon 42(3):437–52.Google Scholar
Wagner, G, Beer, J, Laj, C, Kissel, C, Masarik, J, Muscheler, R, Synal, H-A. 2000. Chlorine-36 evidence for the Mono Lake event in the Summit GRIP ice core. Earth and Planetary Science Letters 181(1–2):1–6.Google Scholar
Wulf, S, Kraml, M, Brauer, A, Keller, J, Negendank, JFW. 2004. Tephrochronology of the 100ka lacustrine sediment record of Lago Grande di Monticchio (southern Italy). Quaternary International 122(1):7–30.Google Scholar
Yiou, F, Raisbeck, GM, Baumgartner, S, Beer, J, Hammer, C, Johnsen, S, Jouzel, J, Kubik, PW, Lestringuez, J, Stiévenard, M, Suter, M, Yiou, P. 1997. Beryllium 10 in the Greenland Ice Core Project ice core at Summit, Greenland. Journal of Geophysical Research 102(C12):26,783–94.Google Scholar