The nature of scattered and concretion pyrite in the Upper Abalak Formation of the Salym oil field (Western Siberia)
- Authors: Iurchenko A.I.1, Takahata N.2, Tanaka K.2, Sano Y.2, Balushkina N.S.1, Kalmykov G.A.1
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Affiliations:
- Moscow State University
- Tokyo University
- Issue: Vol 71, No 6 (2016)
- Pages: 466-471
- Section: Brief Communications
- URL: https://journals.rcsi.science/0145-8752/article/view/174351
- DOI: https://doi.org/10.3103/S0145875216060132
- ID: 174351
Cite item
Abstract
Dispersed and concretionary pyrite in chert–clay–carbonate and carbonate rocks of the Abalak Formation (Salym oil field) have been studied. The study was conducted using Scanning Electron Microscopy (SEM), Electron Probe Microanalysis (EPMA), and high spatial resolution Secondary Ion Mass Spectrometry (Nano-SIMS). As a result, three morphological groups of pyrite have been distinguished: large cubic crystals, framboidal pyrite, and fine-crystal aggregates that replace organic remnants. The sulphur isotope ratio allows one to distinguish two genetic types of pyrite. The source of the sulphur for the first genetic group was H2S produced by bacterial sulphate reduction, while the second group pyrite was formed with sulphur as a product of thermochemical sulphate reduction.
About the authors
A. Iu. Iurchenko
Moscow State University
Author for correspondence.
Email: annette1988@inbox.ru
Russian Federation, Moscow
N. Takahata
Tokyo University
Email: annette1988@inbox.ru
Japan, Tokyo
K. Tanaka
Tokyo University
Email: annette1988@inbox.ru
Japan, Tokyo
Y. Sano
Tokyo University
Email: annette1988@inbox.ru
Japan, Tokyo
N. S. Balushkina
Moscow State University
Email: annette1988@inbox.ru
Russian Federation, Moscow
G. A. Kalmykov
Moscow State University
Email: annette1988@inbox.ru
Russian Federation, Moscow