Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1134/S0024490221010041

Ключевые слова: manganese ores, carbonates, oxides, isotopic composition, carbon, oxygen, karst depressions, yenisei ridge

Аннотация: The chemical and isotopic compositions of manganese carbonate and oxide ores and host dolomites of the Porozhinsk deposit are studied. Manganese carbonates are characterized by low values of delta C-13 (-19.0 to -8.4 parts per thousand, PDB) and delta O-18 (8.8 to 27.3 parts per thousand, SMOW). These data indicate the participation in their formation of the isotopically light carbon from oxidized organic matter, and the water of ore-depositing solutions was most likely meteogenic. The host dolomites (Pod"emsk Formation, Chapa Group) are characterized by a heavier isotopic composition of carbon (2.3-2.6 parts per thousand) and oxygen (22.5-31.3 parts per thousand) that are typical of marine sedimentary carbonates in the Late Proterozoic sedimentation basin. The simplest organisms played a significant role in the genesis of manganese ores. Microbial structures were preserved in manganese carbonates and oxides.

Журнал: LITHOLOGY AND MINERAL RESOURCES

Выпуск журнала: Vol. 56, Is. 3

Номера страниц: 248-265

ISSN журнала: 00244902

Место издания: NEW YORK

Издатель: PLEIADES PUBLISHING INC

• Kuleshov V.N. (Russian Acad Sci, Geol Inst, Moscow 119017, Russia)
• Sviridov L.I (Siberian Fed Univ, Inst Oil & Gas, Krasnoyarsk 660041, Russia)
• Petrov O.L. (Russian Acad Sci, Geol Inst, Moscow 119017, Russia)

• Web of Science Core Collection
• Scopus