Isotope Compositions (δ13C, δ18O) of Manganese Carbonates of the Porozhinsk Deposit (Yenisei Ridge, Krasnoyarsk Region)

New carbon and oxygen isotope data are reported on carbonate ores and host dolomites (upper Pod”emsk subformation) of the Porozhinsk manganese deposit. Manganese carbonates filling the karst depression of the Porozhinsk area are characterized by low δ 13 C (–14.6…–9.5‰, PDB) and δ 18 O (18.8…22.1‰,...

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Bibliographic Details
Published in:Lithology and Mineral Resources 2018-11, Vol.53 (6), p.525-532
Main Author: Kuleshov, V. N.
Format: Article
Language:English
Subjects:
Carbon
Carbonate sediments
Carbonates
Composition
Earth and Environmental Science
Earth Sciences
Isotopes
Karst
Manganese
Manganese deposits
Mineral Resources
Mineralogy
Minerals
Ores
Organic matter
Oxygen isotopes
Sedimentology
Sediments
Solutions
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Summary:New carbon and oxygen isotope data are reported on carbonate ores and host dolomites (upper Pod”emsk subformation) of the Porozhinsk manganese deposit. Manganese carbonates filling the karst depression of the Porozhinsk area are characterized by low δ 13 C (–14.6…–9.5‰, PDB) and δ 18 O (18.8…22.1‰, SMOW). These data indicate that the carbonate formation was contributed by the isotopically light carbon, which was released during the decomposition of organic matter, while waters of the ore-precipitating solutions were presumably of meteoric origin. Host dolomites (Porozhinsk and Mokhovoi areas) are characterized by the heavier carbon (–1.9…2.0‰) and oxygen (23.3…27.7‰) isotope compositions, which are presumably typical of carbonate sediments of the Late Neoproterozoic sea basin.
ISSN:0024-4902
1608-3229
1573-8892
DOI:10.1134/S0024490218060056