Unique siderite occurrence in Baltic Sea: a clue to siderite-water oxygen isotope fractionation at low temperatures

• Autorzy: Hałas S. , Chlebowski R.
• Języki publikacji: EN

Abstrakty

EN

electron microprobe (determination of major cation content) and mass spectrometry (delta13 C and delta18 O analysis). The siderite was interpreted as having formed from metallic iron partly protected from free oxygen access by wood tar with delta13 C = -24 0/00 and from biogenic CO2 produced from this organic matter. Inasmuch as the siderite has highly positive delta3 C values ranging from 8.05 to 15.41 0/00, we deduced that extremely isotopically heavy CO2 was generated in the process of biogenic decomposition of the organic matter. It was found that the delta18 O values of siderite (26.58 to 27.74‰ vs. VSMOW) fit very well to the recalculated curve of Becker (1971) [formula] and to published extrapolated experimental data.

Słowa kluczowe

EN

Baltic Sea; siderite; oxygen isotopes; isotope equilibrium; low temperatures; water

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Geological Quarterly
• Rocznik: 2004
• Tom: Vol. 48, No 4
• Strony: 317--322
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Hałas S.

• Mass Spectrometry Laboratory, Institute of Physics, Maria Curie-Skłodowska University, PL-20-031 Lublin, Poland

autor

Chlebowski R.

• Institute of Geochemistry, Mineralogy and Petrology, Warsaw University, Żwirki i Wigury 93, PL-02-089 Warsaw, Poland

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