Sprawa poszukiwań ropy naftowej w Hercynidach

Abstract

SEARCH AFTER CRUDE OIL IN THE HERCYNIDESThe greatest number of oil bearing strata have been prouved in marine deposits of the type of fore-deeps and geosynclinal seas.On the basis of recent drillings it may be assumed that bitumina should likewise be looked for in the Hercynides, especially in orogenic branches tectonically less affected.In the area of Poland, the Hercynides extend probably in arcs and are extensions of arcs indicated on German territory by H. Stille (1927-1928) and S. Bubnoff (1956). In the east and north, these arcs presumably embrace the area of the Western Sudeten Mountains, the Upper Silesian Coal Basin and the Kielce region of the Swięty Krzyż Mountains (J. Znosko, 1960).Zones of a tectonically less affected orogeny have been determined in the northern and eastern periphery of the Upper Silesian Coal Basin; within these zones, traces of bitumina have been discovered.At the point of the most marked flexure of the orogeny arc, embracing both the Sudeten and the Święty Krzyż Mountains, the Polish Coal Basin is spread out. A similar coal basin may also be expected to exist on the forefield of the arc extending across the Cracow area in the region where the Carpathian Mountains have been overthrusted (S. Bukowy, 1958, 1960).Since coal deposits overlain by a truck series of Flysch deposits may contain large quantities of natural gas, the probability exists of the latter area containing bitumina too.