Palynological and petrographical reconstruction of peat accumulation in the Trans-Carpathians and in the Pannonian Basin at Ilnitsa and Visonta coalfields

摘要

The study of petrographic composition, quality, and spore and pollen complexes of brown coals allows the reconstruction of palaeoconditions of peat accumulation at Ilnitsa and Visonta coalfields. The objective of this research is to provide comparative characteristics of Late Miocene - Pliocene coals in the Trans-Carpathians (Ukraine) and in the Great Hungarian Plain (Hungary) to reconstruct the accumulation conditions in the palaeopeat-bogs by petrographic composition, proximal analysis and palynological data. The results show the predominance of the vitrinite group, in average 79% of the organic substances for Ilnitsa and 86% - for Visonta. The liptinite content is 14% (Ilnitsa) and 10% (Visonta); the inertinite content is 7% and 4%, accordingly. The mineral component amounts are ranging from 1 to 29% in Ilnitsa coals and from 11 to 19% in Visonta. The presence of admixtures of tuff material and opal in the mineral matter are typical in the Ilnitsa coals.