DBPapers
DOI: 10.5593/SGEM2014/B11/S1.003

CARBONATE POSTSEDIMENTATION PROCESSES STUDIES BY ELECTRON PARAMAGNETIC RESONANCE

N. M. Khasanova, N. M. Nizamutdinov, R. A. Khasanov, R. I. Salimov
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-07-0 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 1, 19-26 pp

ABSTRACT
The purpose of this study was to show possibilities of the electron paramagnetic
resonance (EPR) method on the example of carbonate rocks Lodemskoy area
Zimnebrezhnogo diamond district by separating inhomogeneities in them and
identifying indicators going changes. In calcite ions Mn2+ replace Ca2+, and in dolomite occupy positions as Ca2+ as well as Mg2+ positions. Although the basic form of the iron presence in carbonates is Fe2+, but with an increase in the medium oxidation potential some part of the impurity iron as Fe3+ is included a Ca2+ position in calcite and position Mg2+ in dolomite. EPR spectrometer X-band PS 100X (ADANI, Minsk) for recording the spectra at room temperature was used with including Al2O3:Cr3+ crystal in the side hole of the cavity as internal standard lines. Postsedimentary processes carbonates may be explained by the fact that in this area developed ultrabasic rocks (kimberlitic), which is a hotbed for ions Cr, Mn, Fe, Mg which migrate as a true solution and diffuse into the structure of the carbonates, the cations occupying the position that resulted in neoplasm of calcite and dolomite.

Keywords:calcite, dolomite, electron paramagnetic resonance, organic matter,
annealing

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