Przestrzenne rozmieszczenie minerałów miedzionośnych w dolnocechsztyńskich utworach synkliny bolesławieckiej

Abstract

SPATIAL DISTRIBUTION OF COPPER-BEARING MINERALS IN THE LOWER ZECHSTEIN FORMATIONS OF THE BOLESŁAWIEC SYNCLINESummaryThe Bolesławiec syncline represents one of the tectonic elements of the North-Sudetic trough, and constitutes its northern  limb. The copper deposit occurs in the southern part of the syncline and is related to the near-shore facies of the Lower Zechstein geological formation. This formation is underlain with the sandstones and conglomerates of the Rotliegendes. The deposit is cut by numerous faults, particularly in its north-western and south-eastern portions. The middle portion, that comprises the area of the mines “Konrad I” and “Konrad II”, is only slightly disturbed by tectonic processes. Lithologically the formation has been subdivided into the following horizons (Fig. 1A): 1 - boundary sandstones and conglomerates (average thickness about 0,60 m), 2 - basal limestone (average thickness about 0,80 m), 3 - Kaczawa marles (average thickness about 3,10 m), 4 - marly limestones (average thickness about 11,70 m), 5 - dolomitic limestones (average thickness about 29,0 m). Mineralized are both the Kaczawa marls, except for those with red, ferruginous stains and streaks, and, subordinately, the basal portions of marly limestones with the series of basal limestone.