DBPapers
DOI: 10.5593/SGEM2014/B11/S1.012

FORMS AND DISTRIBUTION OF SULPHUR AND SULPHUR-CONTAINING MINERALS AS RELATED TO THE ENVIRONMENTS OF COAL DEPOSITION IN EASTERN PART OF THE UPPER SILESIAN COAL BASIN – POLAND

S. Pusz
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, 93-100 pp

ABSTRACT

Detailed knowledge about quantity and modes of occurrence of sulphur in coals makes possible the choice of proper cleaning and conversion technologies and can help in reconstruction of geological history of coal deposits. The general aim of this study was to provide detailed characteristics of the nature (quantity, distribution and modes of occurrence) of sulphur, iron sulphides and sulphates in low rank bituminous coals from the seams of Laziskie Beds of the Upper Silesian Coal Basin in Poland. The following methods were applied to study the coal samples: optical microscopy, scanning electron microscopy (SEM), X-ray diffraction, Mossbauer spectroscopy and chemical and technical analyses and low temperature ashing (LTA). Based on the results of these investigations, two different regions were distinguished in the studied area, the eastern and the western, differentiated by the character of both the mineral and the organic matter. Two stages of sulphur mineralization: syngenetic and epigenetic were observed in the coal seams. In the eastern region coals are clearly less metamorphosed with greater amount of total sulphur and sulphur minerals, i.e. Fe-sulphides as well as sulphates, mostly of the epigenetic origin. In the western area the rank of coal is higher and sulphur minerals, predominantly pyrite, are less abundant and rather of the syngenetic origin. Thus, the character of differentiation of sulphur mineralization in the eastern and western part of the studied area is mainly the effect of epigenetic stage of the development of coal deposit. Clear relationship was found between geological structure of coal deposit, forms of occurrence of sulphur minerals and rank of the coals studied. It revealed that the differentiation of the subsidence rate in the eastern and western part of the area under investigation began at the end of the syngenetic stage of development.

Keywords:bituminous coal, sulphur, iron sulphides

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