Rückstreuelektronenbild (BSE) und Elementverteilungskarten von Krutovit/Gersdorffit

Diffusionsmodellierung und die Frage nach der Zeit

Wie lang dauern hydrothermale Erz-bildende Prozesse? In einer neuen Publikation von Prof. Majzlan und Kollegen wird dieser Frage mit Hilfe von Diffusionsmodellierungen nachgegangen.
Rückstreuelektronenbild (BSE) und Elementverteilungskarten von Krutovit/Gersdorffit
Foto: Prof. Juraj Majzlan

Small occurrences of Middle Triassic ore mineralizations in the Western Carpathians

Ore mineralizations are closely linked to large-scale geological processes, such as subduction or rifting. In our latest work, we investigated the ore mineralizations in the Western Carpathians that are connected in time to the opening of the Meliata ocean in the Middle Triassic time as the earliest prelude to the Alpine orogeny. The small mineralizations sourced their metals from the surrounding rocks and have different mineral content in sandstones, granites, or metabasic rocks. Sulfur isotopes document at least two sources of this element - Permian evaporites and Lower Paleozoic syngenetic pyrite mineralizations. Textural evidence and diffusion modeling confirm that some of the mineralizations underwent Cretaceous low-grade metamorphism. No big deposits seem to have originated during the Middle Triassic in the Western Carpathians but the number of small, local accumulations of hydrothermal minerals may be large. More information can be found at http://www.geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=majzlan_et_al&vol=14&iss=2Externer Link

Rückstreuelektronenbild (BSE) und Elementverteilungskarten von Krutovit/Gersdorffit
Rückstreuelektronenbild (BSE) und Elementverteilungskarten von Krutovit/Gersdorffit
Foto: Prof. Juraj Majzlan