Sarnthein, M.

Vogelsang, E.

English

Electronic Publication Information Center

Core no. 12329-4 B.C. N 19° 22.0 ' W 19° 55.8 ': 3315 m b.s.l.12329-6 S.C. 3320 m b.s.l.Age control: Date: 28/06/1991• Pyrgo  d18O record (Koopmann, 1979), G. ruber, G. inflata  and C. wuellerstorfi records (Winn et al., 1991).• 14C ages of the total organic fraction (Geyh, 1979).• 14C age of carbonate coarse fraction (H. Erlenkeuser, unpubl. data).• AMS 14C analogue stratigraphy.Core fit :• 9 cm in core -4  0 cm in core -6, based on %CaCO3.Surface sediment age :• Zero, assuming no sediment loss at surface of B.C. -4.Age/depth correlation :Comp.depth14C age Error±CalendaryearsSed.rate    a)Original interval/material/Coreno.Remarks[cm] [ky BP] [ka] [cm/ky] 18O stratigraphy0 0 - . - - 414 2.045 230 1.64 b) - . - 1- 10 cmorganic carbon- 6 ignored,mixed layer28.5 9.1 9.8 b) 2.91 AMS 14C analogue - 632.5 9.48 350 10.56 b) - . - 23- 24 cmcarbonate >200µm- 6 good, butignored32.5 9.76 430 11.12 b) - . - 23- 24 cmcarbonate <200µm- 6 ignored50 14.8 18.3 b) 2.53 AMS 14C analogue - 684 27.85 +2200/-1700?31.35 b) - . - 73- 77 cmcarbonate >125µm- 6 good, butignored87 26.58 +1280/-111030.08 b) - . - 76- 80 cmcarbonate >125µm- 6 ignored94 26 29.5 b) 3.93 AMS 14C analogue - 6a) calculated between AMS analogue ages, pelagic sediments only.b) corrected after Bard et al. (1990).Remarks :• Corg, CO2/Alk, Ntotal data (12329-4) from Hartmann et al. (1976).• 230Th-flux rates indicate sedimentation rates ranging from 2 cm/ka in d18O Stage 1 to 4 cm/ka in Stage 6 (Mangini &Diester-Haass, 1983).• Sample thickness: 3 cm between 0-26 cm; 4 cm between 26-38 cm; 6 cm between 38-50 cm and 10 cm below 50 cm(Diester-Haass archive samples).• Erroneous PDB correction in Pyrgo data set below 3.1 m.Original references:• Sarnthein, M., Winn, K., Jung, S.J.A., Duplessy, J.-A., Labeyrie, L., Erlenkeuser, H. & Ganssen, G. (1994): Changes ineast Atlantic deepwater circulation over the last 30,000 years: Eight time slice reconstructions.- Paleoceanography, 9,209-267.• Winn, K., Sarnthein, M. & Erlenkeuser, H. (1991): d18O stratigraphy and chronology of Kiel sediment cores from theEast Atlantic.- Ber.-Rep. Geol. Paläont. Inst. Univ. Kiel, 45, 99 pp.• Zahn-Knoll, R. (1986): Spätquartäre Entwicklung von Küstenauftrieb und Tiefenwasserzirkulation im Nordost-Atlantik. Rekonstruktion anhand stabiler Isotope kalkschaliger Foraminiferen.- Diss. Univ. Kiel, 111 pp.•  Koopmann, B. (1979): Saharastaub in den Sedimenten des subtropisch-tropischen Nordatlantik während der letzten20.000 Jahre.- Diss. Univ. Kiel, 107 pp.• Geyh, M.A. (1979): 14C routine dating of marine sediments. In: A. Berger & H.E. Suess (eds.), Radiocarbon dating:Proceedings, 9th International conference, Los Angeles (La Jolla), 1976.- Univ. California Press, Berkeley, 470-491.• Hartmann, M, Müller, P.J., Suess, E. & van der  Wejden, C.H. (1976): Chemistry of Late Quaternary sediments andtheir interstitial waters from the northwest African continental margin.- Meteor Forsch.-Ergebn., C24, 1-67.LGM time slice:• GLAMAP: 50-59 cm comp. depth = 41-50 cm orig. depth in core (-6)• EPILOG: 52-62 cm comp. depth = 43-53 cm orig. depth in core (-6)LGM foraminifera counts: Pflaumann (UP)• GLAMAP: (in core -6) 42, 49 cm orig. depth.• EPILOG: (in core -6) 49 cm orig. depth.References for faunal analysis:• Pflaumann, U.  (1975): Late Quaternary stratigraphy based on planktonic foraminifera off Senegal. - "Meteor” Forsch.Ergebn. C, 23, 1-46.DDD D D D D DDDDDDD DD D DDDDFFF FFFFFFF FFFFFFFFFF54320-1-2δ18OC. wuellerstorfi12329-4/6(‰)δ18O(‰)G. ruberEPILOGGLAMAPJ JJ JJJJJJ J J JJ J JJE EEEEE EE E E E EE E EE121620240 20 40 60 80 100Composite depth (cm)° Csummerwinter

Age control of sediment cores GIK12329-4 and GIK12329-6

Abstract

Similar works

Full text

Available Versions

Electronic Publication Information Center