50 KB5549 KB42 KB200020242010Dozet, StevoGodec, Matjažštevilka:4letnik:44str. 173-183ISSN:1580-2949COBISSID:816554URN:URN:NBN:SI:doc-BSYBDAHTenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeDinaridiEDS analizaelektronska mikroskopijakaolinitkarbonatne kamnineSloveniaSlovenijasrednji triasvulkanske kamnineXRDMiddle triassic dry-land phases in southern Slovenia| Srednjetriasne kopenske faze v južni Sloveniji|In the Middle Triassic lithostratigraphic sequence of southern Slovenia and neighbouring Gorski Kotar, Croatia, three dry-land phases have been recognized: 1 - between the Lower and Middle Triassic, 2 - in between the Anisian stratigraphic sequence, and 3 - between the Anisian and Ladinian beds. Traces of the Anisian volcanism have also been discovered. The dry-land episodes of the non-deposition and volcanic activity are ascribed to synsedimentary tectonic movements of the Alpine tectonic cycle. However, new data enable a new approach to the paleogeographical evolution of the area. In the Triassic "Dolomite" Complex, lenses of kaolinite deposits occur, representing an important correlation horizon for the basal Ladinian beds. They consist chiefly of kaolinite and quartz admixed in smaller quantities by hematite, goethite, nontronite, gibbsite, groutite and montmorillonite. The kaolinite deposits were formed in a marsh with weathering of the pyroclastic materialsV srednjetriasnem litostratigrafskem zaporedju južne Slovenije in sosednjega Gorskega Kotarja (Hrvaška) so ugotovljene tri okopnitve, in sicer: 1 - med spodnjim in srednjim triasom, 2 - v aniziju ter 3 - med anizijem in ladinijem. Odkriti so tudi sledovi anizijskega vulkanizma. Okopnitve in vulkanizem povezujemo s sočasnimi tektonskimi premiki Alpidskega tektonskega cikla. Novi podatki omogočajo nov pogled na paleogeografski razvoj obravnavanega ozemlja. V triasnem dolomitnem kompleksu se pojavljajo leče kaolinitnih usedlin, ki so pomemben korelacijski horizont za bazalne ladinijske plasti. Sestojijo v glavnem iz kaolinita in kremena, katerima so v manjših količinah primešani hematit, goethit, nontronit, gibbsit, groutit in montomorilonit. Kaolinitne usedline so nastale v močvirju pri razpadu piroklastičanega materialaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije