Przykłady zastosowania racjonalnych metod regionalnego poszukiwania kruszywa naturalnego

Abstract

ON RATIONAL METHODS OF REGIONAL PROSPECTING FOR NATURAL BALLAST STONE

Summary

Since considerable expenditure on building industry inPolandis planned for the years 1976–1990, suitable reserves of natural ballast stone have to be found.

Thus prospecting for deposits of proper raw materials and studies of these deposits have to be intensified. In order to ensure the proper evaluation of natural ballast stone reserves in this country the Deparment of Non-Metallic Mineral Deposits at the Geological Institute inWarsawhas prepared a study on “Methods of Geological and Prospecting Works Concerning Natural Ballast Stone.” This study covers all kinds of problems connected with the proper research concepts, planning and realization of regional geological research and prospecting work in this field.

In accordance with the methods mentioned above, regional prospecting for deposits of natural ballast stone was made in the following areas: the ancient valley of the Noteć-Warta, Mazovia and Koszalin District. The areas of research and prospecting works were selected on the basis of an analysis of the relationship between the accumulation forms of coarse-clastic raw materials and the geological structure of the following morphogenetic units: end-moraine zones, outwash areas, ancient valleys, river valleys, marginal valleys and tunnel valleys. These research concepts let to the discovery of new prospective areas. In the area of the ancientNotec-WartaValley, the largest deposits of ballast stone are connected with alluvial fans of outwash valleys, flowing into the ancientNoteć-WartaValley, and with fossil horizons of fluvioglacial accumulation. Thus reserves of natural ballast stone, estimated at about 150 million tons, were found in the alluvial fan of the outwashvalleyofMyśla, in the area of Kaleńsko (Figs. 1, 2).

It has been found that new deposits of natural ballast stone in Mazovia are most likely to occur in fossil accumulation horizons of the Wisła,Narewand Bug river valleys (Figs. 3, 4). Besides, prospective areas may also be found in the fossil horizons of fluvioglacial accumulation and of marginal valleys on high grounds (Fig. 3).

In the Koszalin District, the most prospective areas of natural ballast stone were found within surface morphogenetic forms (end-moraines, outwash fields, tunnel valleys) and in fossil horizons of fluvioglacial accumulation (Fig. 5).

In the program of prospecting by means of the new methods described above, the possibility of finding new reserves of raw materials is based on detailed biological documentation. Thus further geological and prospecting investigations can be rationally planned. New programs of prospecting for these raw materials in other parts ofPolandare being prepared by the Geological Institute.