On the Variations in the Relative Abundance of the Carbon Isotopes in Carbonate Minerals

Wickman, Frans E.; Blix, Ragnar; Ubisch, H. von

doi:10.1086/625833

Cited by 30 publications

(2 citation statements)

References 3 publications

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“…The very small difference in isotopic composition between the coal and the graphitised coal (samples no. 53993 and 20910), seen in connection with the geological evidence of contact metamorphism, is in agreement with previous investigations (RANKAMA 1954, WICKMAN 1953, and WICKMAN et al 1951 which show that 'thermal metamorphism , and graphitisation cause no change in the isotopic composition and that The high values of about -32 0 / 00 for the samples no. 20909,20910,20911,20912,52972,52993, suggest the accumulation of organic material under extreme reducing conditions (JEFFERyet al 1955).…”

Section: The Results Of the Investigationsupporting

confidence: 92%

Precambrian organisms and the isotopic composition of organic remains in the Ketilidian of South-West Greenland

Bondesen¹,

Pedersen²,

Jørgensen³

1967

bullggu

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The geological setting of organic remnants from well preserved Ketilidian rocks of SW Greenland is presented. The absolute age (2000? m. y.) of the rocks is discussed and compared to that of other regions. Many types of organic remnants have been found in these low-metamorphic rocks. Most of the organic remnants are microscopic globules and fragments with cell-like structures. The type which is best preserved is a complex globular structure on about 1/2mm in diameter. This structure is established as a new monotypic form genus Vallenia erlingi (Raunsgaard Pedersen) n. gen. et sp. Stromatolithes and other macro-structures of possible organic origin are also found. A coal-graphite layer indicates that large-scale accumulation of organic matter has taken place. The organic remnants are so well preserved that it has been possible to extract small amounts of paraffines (n-C11 to n-C31 with maximum about n-C18 to n-C20) and other organic compounds. The carbon-isotope composition from carbonaceous matter and carbonates from a number of samples has been determined. The analytical procedure is described. The result of this investigation shows δ C13-values which indicate that the carbonaceous material is probably of organic origin.

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Section: The Results Of the Investigationsupporting

confidence: 92%

Precambrian organisms and the isotopic composition of organic remains in the Ketilidian of South-West Greenland

Bondesen¹,

Pedersen²,

Jørgensen³

1967

bullggu

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“…Similar results. 'have been reported by Wickman & co-workers (47,48) and by Mars (49). From these data the experimental a between atmospheric CO2 and carbonate was calculated.…”

Section: Specific Activity Of Natural Radiocarbonmentioning

confidence: 54%

The Production and Distribution of Natural Radiocarbon

Anderson¹

1953

Annu. Rev. Nucl. Sci.

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Die Fraktionierung der Kohlenstoffisotopen bei der Absorption von Kohlendioxyd

Baertschi

1952

Helvetica Chimica Acta

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Es wird experimentell festgestellt, dass bei der Absorption von CO2 aus einem Gasgemisch durch Lösungen von Alkalien die Aufnahme von 12CO2 um den Faktor 1,014 schneller erfolgt als diejenige von 13CO2. Ein ähnlicher Fraktionierungsfaktor von 1,011 ergibt sich auch bei der Absorption reiner CO2. Der Effekt lässt sich am besten auf die um den Faktor 1,011 voneinander verschiedenen gaskinetischen Auftreffwahrscheinliehkeiten der 12CO2‐ und 13CO2‐Molekeln bezüglich der absorbierenden Flüssigkeitsoberfläche zurückführen.

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On the Variations in the Relative Abundance of the Carbon Isotopes in Carbonate Minerals

Cited by 30 publications

References 3 publications

Precambrian organisms and the isotopic composition of organic remains in the Ketilidian of South-West Greenland

Precambrian organisms and the isotopic composition of organic remains in the Ketilidian of South-West Greenland

The Production and Distribution of Natural Radiocarbon

Die Fraktionierung der Kohlenstoffisotopen bei der Absorption von Kohlendioxyd

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