O możliwości wykorzystania porfirów Trógarbu jako potasowego surowca skaleniowego

Abstract

ON POSSIBILITY OF USING THE TRÓJGARB PORPHYRIES AS POTASSIUM FELDSPATHIC RAW MATERNAL Summary The Trójgarb massif, situated in the northern part of the Intra-Sudetic depression, is built up of young Palaeozoic felsite porphyries characterized by aphanite texture. Geochemical examinations have demonstrated that the porphyries are characterized by a high potassium content (about 7% K2O), by a considerable potassium/sodium ratio (K2O:Na2O – about 14%), as well as by a low iron content (Fe2O3 - below 1%). The chemical composition of these porphyries suggests that the rocks here considered may be used as potassium feldspathic raw material.