Vol 34, (1991)

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Category: Vol 34, (1991)

• Miocene
• brown coal
• geology
• Cheb
• Sokolov
• Krkonoše
• Piedmont Basin
• Cypris serie
• Most

Authors: Oldřich Malán & Norbert Volkmann

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 Abstract: The paper presents the first essay on geological prospection and petrological evaluation or the four indisputably most important deposits of bituminous shales in the North-Western part (Krušné hory Basins) and the Northern part (Krkonoše Piedmont Basin) of the massif. While the three localities of bituminous shales of miocene age in the basins of Krušné hory (the Basins of Cheb and Sokolov) contain brownish to chocolade-brown lacustrine laminites, lacking pyrite, whose organic matter is mostly derived from the tel- as well lamalginites, the black, laminar to hair-like schistosed Permo-Carboniferous bituminous and coaly-bituminous shales from the Krkonoše Piedmont Basin of the same lacustrine origin (strongly calciferous), contain predominantly the liptinitic macerals, derived from the both "arts" of alginite as well as from sporinite and bituminite (I and II). The huminitic material play a much more important role here. All the studied localities can be designed as poor with tar yields (T_s K^d) between 6-8%. An exception can be observed in the top of the Cypris serie as well as in the Miocene seam (Sm) of a maar origin in the Southern part of the Basin of Most (NW Bohemia) – 7–11% of tar. The paper deals with the usually employed petrological analytics in comparing those deposits with others in the world.