UDC 551.442(437) Katarína Bónová, Pavel Bella, Ján Bóna, Ján Spišiak, Martin Kováčik, Martin Kováčik & Ľubomír Petro: Heavy minerals in sediments from the Mošnica Cave: Implications for the preQuaternary evolution of the middle-mountain allogenic karst in the Nízke Tatry Mts., Slovakia The cave deposits from the Mošnica Cave located on the northern slope of the Nízke Tatry Mts. were analysed by sedimentological, petrographical and mineralogical methods. Based on mineralogical study the cave sediments are composed of dolomite, quartz, muscovite, amphibole, chlorite, calcite, Kfeldspar and plagioclase. Heavy mineral assemblage is formed by garnet, zircon, apatite, monazite, tourmaline, staurolite, rutile, titanite, epidote, sillimanite, allanite, andalusite and barite. Opaque minerals are represented by ilmenite, pyrite, magnetite, Cr-spinel, Fe-oxyhydroxides and chalcopyrite. Detailed research of chemical composition of the heavy minerals points to their source rocks formed by granitoids, amphibolites and amphibolite gneisses representing the crystalline basement and probably by Triassic cover sediments of the Lúžna Formation. Presence of the allochthonous minerals in the cave from metamorphic complex recently occurred on the opposite southern slope of the Nízke Tatry Mts. indicates a past larger catchment area of the allogenic karst of Mošnica Valley on the pre-Quaternary less dissected terrain. A change of watershed boundary leading through the central range of the Nízke Tatry Mts. was probably connected with the tilting of this mountain range
IzvlečekUDK 551.442(437) Katarína Bónová, Pavel Bella, Ján Bóna, Ján Spišiak, Martin Kováčik, Martin Kováčik & Ľubomír Petro: Težki minerali v sedimentih iz jame Mošnica: implikacije za predkvartarni razvoj srednjegorskega alogenega krasa v Nizkih Tatrah, Slovaška Jamski sediment iz jame Mošnica, ki se nahaja na severnem pobočju Nizkih Tater, so bili analizirani z sedimentološkimi, petrografskimi in mineraloškimi metodami. Na podlagi mineraloških raziskav jamske sedimente sestavljajo dolomit, kremen, muskovit, amfibol, klorit, kalcit, K-glinenec in plagioklaz. Težko mineralno frakcijo predstavljajo granat, cirkon, apatit, monazit, turmalin, staurolit, rutil, titanit, epidot, sillmanit, allanit, andaluzit in barit. Neprozorni minerali so zastopani z ilmenitom, piritom, magnetitom, Cr-spinelom, Fe-oksihidroksidi in halkopiritom. Detajlna analiza kemične sestave težkih mineralov je nakazala njihov izvor iz granitov, amfibolitov in amfibolitnih gnajsov, ki predstavljajo kristalinsko podlago in iz triasnih krovnih sedimentov Lužna formacije. Prisotnost alohtonega materiala iz metamorfnega kompleksa, ki so bili najdeni v jami na nasprotnem južnem pobočju Nizkih Tater nakazuje nekdanje večje območje porečja alogenega krasa v dolini Mošnice na predkvartarnim manj razčlenjenim terenu. Sprememba meje porečja, ki poteka skozi osrednje območje Nizkih Tater je bila verjetno povezana z nagibanjem tega pogorja proti severu zaradi kompresijskega tektonskega režima v času poznega ...