Millerit a další minerály z pelosideritových konkrecí z dolu ČSA u Karviné (Česká republika)
Článek v PDFMillerite and other minerals from the sideritic nodules from the ČSA Mine near Karviná (Czech Republic)
The nickel sulphide, millerite, has been found at several places within the 11th block of the ČSA Mine in the Czech part of the Upper Silesian Basin. It forms radial aggregates up to 10 mm in association with galena, sphalerite and clay mineral at the fissures of sideritic nodules. It is one of few well documented millerite finds, as most of known material comes from mine dumps. Chemical analyses yielded the average composition (Ni0.92Co0.05Fe0.03)S1.00. Millerite is one of the lates forming sulphides in the low temperature hydrothermal mineralization. Its occurences are bound to specific lithological and tectonical conditions, such as open fissures in sandstones and sideritic nodules.
Jakub Jirásek, Institute of Geological Engineering, Faculty of Mining and Geology, Vysoká škola báňská – Technical University of Ostrava, 17. listopadu 15/ 2172, 708 33 Ostrava-Poruba, Czech Republic, e-mail: jakub.jirasek@vsb.cz
Michal Osovský, OKD, a.s., Karviná Mine, ČSA Unit, ul. Čs. armády 1, 735 06 Karviná-Doly, e-mail: michal.osovsky@okd.cz