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Vienna Radium Institute Radiocarbon Dates XVI (1987)

Felber, Heinz

Cambridge University Press

In: Radiocarbon. 1987; 29(3): 389-396. Published 1987 Jan 01. doi: 10.1017/s0033822200043782.

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Publikationsdatum: 1987-01-01

Beschreibung: Measurements have continued with the same proportional counter system, pretreatment procedure, methane preparation and measurement, and calculation, as described previously (R, 1970, v 12, no. 1, p 298–318). Uncertainties quoted are single standard deviations. No 13C/12C ratios were measured. Sample descriptions have been prepared in cooperation with submitters. Some dates have been calibrated using the correction tables of Klein et al (1982) and are reported as “cal” ages in the comment.

Print ISSN: 0033-8222

Digitale ISSN: 1945-5755

Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

Publiziert von Cambridge University Press

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2

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Measurement of Small Volume Oceanic 14C Samples by Accelerator Mass Spectrometry (1987)

Schlosser, Peter ; Pfleiderer, Christoph ; Kromer, Bernd ; [weitere]

Cambridge University Press

In: Radiocarbon. 1987; 29(3): 347-352. Published 1987 Jan 01. doi: 10.1017/s0033822200043757.

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Publikationsdatum: 1987-01-01

Beschreibung: A technique for 14C measurement of small volume (0.5L) oceanic water samples by Accelerator Mass Spectrometry (AMS) is described. Samples were taken from a CTD/rosette system used for standard hydrographic work. After CO2 extraction and target preparation, the samples were measured at the Zürich tandem accelerator facility. On the basis of 14C data from samples collected on a station in the northern Weddell Sea, the precision of the measurements is estimated to ca ±8‰. The error in the present AMS results is dominated by the statistical error in 14C detection. From results of duplicate targets, it is concluded that a precision of ±5° can be reached. The 14C data are discussed in relation to the Weddell Sea hydrography.

Print ISSN: 0033-8222

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

Publiziert von Cambridge University Press

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3

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Discussion Comments on Multiple Dating of a Long Flowstone Profile (1987)

Grün, Rainer ; Schwarcz, Henry P

Cambridge University Press

In: Radiocarbon. 1987; 29(1): 148-152. Published 1987 Jan 01. doi: 10.1017/s0033822200043629.

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Publikationsdatum: 1987-01-01

Beschreibung: We strongly welcome the investigation by Geyh and Hennig (1986) and agree with their conclusion that the boundaries of the interglacial periods cannot be determined exactly using the methods applied so far in the Heggen cave. However, since we have been engaged for several years in the application of these methods (except 14C), and since the paper gives a very different interpretation of the ESR results from that presented by one of us (Grün, 1985), we feel the need to make some comments on this paper.

Print ISSN: 0033-8222

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

Publiziert von Cambridge University Press

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4

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The Impact of Bioturbation on Ams 14C Dates On Handpicked Foraminifera: A Statistical Model (1987)

Andree, Michael

Cambridge University Press

In: Radiocarbon. 1987; 29(2): 169-175. Published 1987 Jan 01. doi: 10.1017/s0033822200056927.

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Publikationsdatum: 1987-01-01

Beschreibung: When single species of foraminifera picked from marine sediments are 14C dated with Accelerator Mass Spectrometry (AMS), bioturbation puts limits on the minimal sample size to be used, as uncertainty is added to the result by statistics of the picking process. The model presented here simulates the additional statistical uncertainty introduced into the measurement by the coupling of bioturbation and small sample amounts. As there is no general solution for this problem, we present two simple cases only. The model can also be used to simulate more complicated situations occurring in sediments.

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

Publiziert von Cambridge University Press

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5

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Antwerp University Radiocarbon Dates IV (1987)

Vanhoorne, R ; Dubois, A D

Cambridge University Press

In: Radiocarbon. 1987; 29(1): 57-60. Published 1987 Jan 01. doi: 10.1017/s0033822200043563.

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Publikationsdatum: 1987-01-01

Beschreibung: Samples processed since the last list was published (R, 1978, v 20, no. 3, p 192–199) are reported here. The dates were obtained by liquid scintillation counting of benzene, using laboratory procedures outlined in previous articles (R, 1976, v 18, no. 2, p 151–160; R, 1977, v 19, no. 3, p 383–388).

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

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6

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Reply (1987)

Geyh, Mebus A ; Hennig, G J

Cambridge University Press

In: Radiocarbon. 1987; 29(1): 153-155. Published 1987 Jan 01. doi: 10.1017/s0033822200043630.

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Publikationsdatum: 1987-01-01

Print ISSN: 0033-8222

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

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7

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Index Volume 29, Nos. 1 to 3, 1987: Geologic Samples (1987)

Cambridge University Press

In: Radiocarbon. 1987; 29(3): 441-443. Published 1987 Jan 01. doi: 10.1017/s0033822200043836.

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Publikationsdatum: 1987-01-01

Print ISSN: 0033-8222

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

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8

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Harwell Radiocarbon Measurements V (1987)

Walker, A J ; Keyzor, R S ; Otlet, R L

Cambridge University Press

In: Radiocarbon. 1987; 29(1): 78-99. Published 1987 Jan 01. doi: 10.1017/s0033822200043587.

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Publikationsdatum: 1987-01-01

Beschreibung: The results presented in this list include some recently measured samples (1984) but mostly ones from our earlier years of operation which had not been previously published in RADIOCARBON. It is the first of a number of special lists prepared over the last year so that the backlog of unpublished dates of this laboratory will be cleared. The samples are all archaeologic from the United Kingdom most of which have originated from “rescue”-type excavations.

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

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9

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Radiocarbon Content of Tropospheric CO2 at China Lake, California 1977–1983 (1987)

Berger, Rainer ; Jackson, T B ; Michael, Robert ; [weitere]

Cambridge University Press

In: Radiocarbon. 1987; 29(1): 18-23. Published 1987 Jan 01. doi: 10.1017/s0033822200043526.

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Publikationsdatum: 1987-01-01

Beschreibung: The measurements reported here are a continuation of tropospheric radiocarbon measurements in carbon dioxide carried out since 1961 at our China Lake, California collection facility. The data show a continued decrease in radiocarbon activity from ca 330‰ in 1977 to 215‰ in 1983 in agreement with similar analyses in Europe for the same time interval.

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

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10

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Tbilisi Radiocarbon Dates IV (1987)

Burchuladze, A A ; Togonidze, G I

Cambridge University Press

In: Radiocarbon. 1987; 29(2): 239-262. Published 1987 Jan 01. doi: 10.1017/s0033822200056964.

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Publikationsdatum: 1987-01-01

Beschreibung: Results presented below were obtained by the Radiocarbon Laboratory of Tbilisi State University from 1976 to 1983. Throughout that period dates were determined not only for archaeologic samples but also for samples of mineral waters, soil humus, and geologic origin. Georgian wines of 1909–1975 were also analyzed but the results obtained are not discussed in this paper as they were published elsewhere (Burchuladze et al, 1977, 1979, 1980, 1982).

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Thema: Klassische Archäologie , Energietechnik , Geologie und Paläontologie

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