Search results
Title Determination of Pb isotope ratios in Sb-mineralization from Western Carpathians Author info Peter Andráš ... [et al.] Author Andráš Peter 1953- (40%) UMBFP04 - Katedra životného prostredia
Co-authors Chovan Martin (30%)
Dirner Vojtech 1953- (15%)
Kráľ Ján (15%)
Source document Selected Sb-Au, Cu-Ag and Hg ore deposits - origin, mineralogy, environmental problems. S. 49-60. - Košice : Technická univerzita, 2015 / Zamarský Vítězslav ; Števulová Naděžda ; Marschalko Marian ; Buccheri Giuseppe 1973- Keywords Pb-izotopy mineralizácia - mineralization Pb-isotopes mineralization Headings Geogr. Západné Karpaty (pohorie) Language English Country Slovak Republic systematics 55 Annotation The article present the comparison of the Pb-isotope study of antimony-ores from important Sb-mineralization of Western Carpathian: from Tatric unit (Pezinok, Kuchyňa, Pernek, Dúbrava, Magurka, Lom, Trangoška, Jasenie, Kriváň deposits and occurrences), Gemeric unit (Helcmanovce, Grexa and Poproč deposits) and from Eastern Slovakian neovolcanites (Zlatá Baňa). The study is compared with results of previous investigations of affiliated galena mineralization. The lead is of a crustal origine. The lead from Taric and that from Gemeric unit (and Eastern Slovakian Neovolcanites) seems to be derived from different reservoirs Public work category AED No. of Archival Copy 36971 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ 
unrecognised
Title Au incorporation in gold-bearing sulphides Subtitle (Western Carpathians) Author info Peter Andráš, Martin Chovan Author Andráš Peter 1953- (70%) UMBFP04 - Katedra životného prostredia
Co-authors Chovan Martin (30%)
Source document Selected Sb-Au, Cu-Ag and Hg ore deposits - origin, mineralogy, environmental problems. S. 61-83. - Košice : Technická univerzita, 2015 / Zamarský Vítězslav ; Števulová Naděžda ; Marschalko Marian ; Buccheri Giuseppe 1973- Keywords arsenopyrite pyrite invisible gold gold-antimony deposits Mossbauer spectroscopy Headings Geogr. Západné Karpaty (pohorie) Language English Country Slovak Republic systematics 55 Annotation Numerous occurrences and deposits of Sb-Au mineralization containing gold-bearing sulphides are described from an area of the Tatric Unit in Western Carpathians e.g.: Pezinok, Dúbrava, Jasenie, Nižná Boca, Vyšná Boca etc. It was shown, that arsenopyrite is the main sulphide mineral incorporating invisible gold in its crystal structure. Concentrations of invisible gold in pyrite are not as high as in arsenopyrite. Only if arsenic is present in the pyrite in amounts greater than 0.2 wt %, there is significant incorporation of Au in its crystal structure. Gold content in these sulphides ranges from zero up to n.100 ppm. The fine-grained types contain higher Au concentrations, by as much as an order of magnitude. This work has demonstrated that Au coprecipitated together with Fe, As and S during the arsenopyrite and pyrite crystallization and was incorporated in sulphide mineral crystals both as native gold and chemically bound gold. Although As and Au contents in arsenian pyrites and arsenopyrites vary from sample to sample, there is a positive correlation between Au and As. The covariance in As and Au indicate that they were transported by the same solution and that the same geochemical processes led to their removal from solution. Au is predominantly concentrated within As-rich zones of gold-bearing sulphides. Gold-bearing arsenopyrite and pyrite precipitated at the onset of the paragenetic sequence. They crystallized within a broad temperature range: 319 to 450 °C Public work category AED No. of Archival Copy 36952 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ unrecognised
Title Geochemometrical comparison of Western Carpathian and Eastern Alpine deposits Author info Erich Schroll, Peter Andráš, Martin Chovan Author Schroll Erich (40%)
Co-authors Andráš Peter 1953- (40%) UMBFP04 - Katedra životného prostredia
Chovan Martin (20%)
Source document Selected Sb-Au, Cu-Ag and Hg ore deposits - origin, mineralogy, environmental problems. S. 5-9. - Košice : Technická univerzita, 2015 / Zamarský Vítězslav ; Števulová Naděžda ; Marschalko Marian ; Buccheri Giuseppe 1973- Keywords magnezitové ložiská magnezitové ložiská - magnesite deposits geológia - geology Headings Geogr. Západné Karpaty (pohorie) Východné Alpy Language English Country Slovak Republic systematics 55 Annotation Carpathian and Alpine ore and non-ore mineralization. The massive sulphide, stibnite and other siderite as well as magnesite deposits. The age of these mineralization vary from the oldest massive sulfides (about 600 Ma) to youngest gold-silver-polymetallic mineralization of Central Slovakian Neovolcanites. The article discuss also the variable Pb, S, C and O isotope distribution of the mentioned different types of mineralization Public work category AED No. of Archival Copy 36935 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ unrecognised