Złoże kwarcu żyłowego w Olesznej Podgórskiej na tle innych złóż kwarcu w północnej odkrywce granitu Karkonoszy
Abstract
VEIN QUARTZ DEPOSIT AT OLESZNA PODGÓRSKA COMPARED WITH THE OTHER QUARTZ DEPOSITS IN THE NORTHERN GRANITE OUTCROP OF THE KARKONOSZE MTS.
Summary
Deposit discovered by the present author at Oleszna Podgórska was formed in a tensionally, gaping fissure, within a dislocation zone at the boundary of the Pogórze Izerskie gneissose complex and the Kaczawskie Góry schist series. The deposit consists of coarse-grained, milky-white quartz that almost completely lacks any ingrowths of other minerals and reveals iron hydroxide incrustation of fracture planes. Simple chemical cleaning allows us to obtain milled product that, in terms, of Fe2O3, TiO2 and Al2O3 contents, corresponds to the rock crystal exploited in Brazil. It is also the purest product so far obtained in Poland from home mineral raw materials. The quality of the mineral raw materials from Oleszna Podgórska is a result of its genetical dissimilarity, as compared with the other quartz deposits in the area of West Sudetes. Quartzite that is exploited in the area of Izerskie Garby was formed as a result of metasomatic replacement of rocks by quartz in the dislocation zone. On the other hand, conformable quartzite intercalations in gneisses in the vicinity at Barcinek and other similar forms are of polygenic nature and, most probably, may be related to acid pyroclastic rocks.
Summary
Deposit discovered by the present author at Oleszna Podgórska was formed in a tensionally, gaping fissure, within a dislocation zone at the boundary of the Pogórze Izerskie gneissose complex and the Kaczawskie Góry schist series. The deposit consists of coarse-grained, milky-white quartz that almost completely lacks any ingrowths of other minerals and reveals iron hydroxide incrustation of fracture planes. Simple chemical cleaning allows us to obtain milled product that, in terms, of Fe2O3, TiO2 and Al2O3 contents, corresponds to the rock crystal exploited in Brazil. It is also the purest product so far obtained in Poland from home mineral raw materials. The quality of the mineral raw materials from Oleszna Podgórska is a result of its genetical dissimilarity, as compared with the other quartz deposits in the area of West Sudetes. Quartzite that is exploited in the area of Izerskie Garby was formed as a result of metasomatic replacement of rocks by quartz in the dislocation zone. On the other hand, conformable quartzite intercalations in gneisses in the vicinity at Barcinek and other similar forms are of polygenic nature and, most probably, may be related to acid pyroclastic rocks.