Nowe obszary perspektywiczne występowania trzeciorzędowych piasków formierskich

Abstract

NEW PROMISING OCCURRENCE AREAS OF TERTIARY FOUNDRY SANDSSummaryIn South Poland, north of Częstochowa, a dozen or so of outcrops of Tertiary deposits were discovered from 1964 to 1966. These deposits can be used as foundry masses in metallurgy. They rest on the Upper Jurassic limestones, on the Albian sandstones, or on the surface of the Upper Cretaceous carbonate rocks, filling in at places various karst forms. The profile of the Tertiary deposits consists of weathered loams, limestone debris, flints and cherts, sands, clay sands, arenaceous loams, clays, silts and brown coals. A more comprehensive description of the Tertiary formations and of the Quaternary ones found to occur in the overburden has been presented in a special paper (S. Skompski, 1971). Among the Tertiary deposits mentioned above only sands, clay sands and arenaceous loams can be useful in the foundry process. The thickness of these deposits ranges widely, from 0,5 m to 30,0 m. Most of the fourteen outcrops here discussed (Fig. 1) are characterized by favourable exploitation conditions. A deposit situated at Nowa Wieś, described more in detail, has been presented in the light of the geological structure illustrated by a map and a geological cross section (Figs 2 and 3), its value being supported by an analysis (Fig. 4, Tab. 1). For further research works a special field method is suggested (field routes, probing, test pits, etc.) tested within another area (M. Błaszak, 1962, 1970).