Geochemistry and mineralization of Novaky coal seam

The mineralization and geochemistry of the most important Slovak coal deposit in Novaky was intensively studied in the past. The favourable geological conditions create rich mineral association. There are different minerals in the deposit and they are responsible for the enhanced content of some elements in the coal. The summary of notions about geochemistry and mineralization of the coal seam with the emphasis on the main harmful elements sulphur and arsenic and their spacial distribution are studied in this paper

The geology and petrography composition of coal from Handlová deposit

In some countries, including the Slovak Republic caustobioliths have been and for the foreseeable future will continue to be the most important source of energy.During the geological development of the territory of Slovak Republic, suitable conditions for the formation of coal-bearing formations were created. Within the stratigraphical span, it presents the period from the Carboniferous to the Pliocene. The West Carpathians as a part of the Alpine mobile zone are characterised by a complex tectonic development with an intensive manifestation within a relatively small space. Frequent vertical motions of the Earth`s crust precluded the formation of a more extensive flat and shallow basin enabling a greater concentration of plant detritus, and hence the formation of greater, extensive accumulation spaces with the coal-bearing sedimentation.Handlová coal deposit represents one of the most important accumulation of caustobioliths in the Slovak Republic. The deposit is situated in the Prievidza district.In the geological structure of the region are incorporated crystalline, Late Paleozoic, Mesozoic, Paleogene, Neogene sedimentary and volcanic rocks and Quaternary deposits.The sample examined were lignitic humites with variable xylite, detrite and mineral contents. Huminite reflectance (R0=0,33%) corresponding to the lignitic orthotype. Huminite concentration (86,6%) is the most abundant maceral group. The maceral ulminite, textinite and densinite contributes to the high huminite content. The concentration of attrinite and gelinite is substantially lower, i. e. 2,4 %. Corpohuminite contents does not exceed 3,2 %.Liptinite is formed by waxy and resinous substances. The maceral composition of liptinite was determined by a fluorescence measurement. The remaining liptinite macerals, i.e. cutinite, sporinite, resinite, suberinite, and fluorinite are accessory.The content of inertinite (sklerotinite) is low (0,7%).The mineral admixture of the coal seams in Handlová basin is mainly formed by clayey and tuffogenic material, also by pyrite, marcasite, realgar, orpiment, various modifications of qartz and gypsum.Coal mined in the Handlová mine is used for the power industry. The aim of our work was to evaluate the geology and petrography composition of Handlová mine

The geology, petrography and mineralogy composition of coal from the Nováky deposit

Na území regiónu Vtáènik - Horná Nitra sa vyskytujú významné zdroje energetických surovín na Slovensku. Patrí k nim aj loisko Nováky. Hlbie podloie je reprezentované horninami veporika a to vápencami, slieòmi a dolomitmi kriòanského príkrovu, ktoré sú prekryté hronikom, reprezentovaným maluickým súvrstvím (perm-trias) melafýrových hornín. Najstaria èas neogénnej výplne panvy je reprezen-tovaná èausianskym súvrstvím (egenburg), prièom naò diskordantne nasadá kamenské súvrstvie (báden), reprezentované pestrým súborom hornín, tvorených redeponovanými produktami vulkanizmu vo forme konglomerátov, ktoré tvorí priame podloie produktívneho nováckeho súvrstvia. V nadloí nováckeho súvrstvia sú vyvinuté "nadloné íly" koianskeho súvrstvia. Na denudovaný reliéf územia boli uloené sedi-menty lehotského súvrstvia.Vzorky lignitu z loiska Nováky sú budované prevane xylitickým detritom, s hrubími xylitickými vlokami. V macerálovej skupine huminitu má pomerne výrazné zastúpenie denzinit, ulminit B (svetlá varieta), korpohuminit, gelinit a textinit A (tmavá varieta). Macerálová skupina liptinitu je zastúpená suberinitom, rezinitom, sporinitom, kutinitom, liptodetrinitom, bituminitom a identifikovaný bol aj fluorinit. Minerálna prímes je tvorená najmä ílovým materiálom a pyritom. Auripigment a realgár vytvára jemné nálety na vrstevných plochách a tieto minerály vystupujú v spojitosti s rôznymi modifikáciami kremeòa a podie¾ajú na vysokom obsahu As v nováckom uhlí. Okrem týchto minerá-lov sa v uhlí nachadzájú aj sekundárne sírany (sádrovec, anhydrid, melanterit)