Bakos F., Mikuš T., Hraško Ľ., Pauditš P. & Sýkora M., 2016: Supergene Au mineralization at Divín – Divínsky háj locality (Slovenské rudohorie Mts., Veporic Unit). Acta Geologica Slovaca, 8, 2, 165–174.

Supergene Au mineralization at Divín – Divínsky háj locality (Slovenské rudohorie Mts., Veporic Unit)

František Bakos¹, Tomáš Mikuš², Ľubomír Hraško³, Peter Pauditš³ & Maroš Sýkora¹

¹AQUA SYM, Ltd., Ľ. Štúra 555/4, 990 01 Veľký Krtíš, Slovakia; fbakoss@yahoo.com
²Earth Science Institute of the Slovak Academy of Sciences, Ďumbierska 1, 974 01 Banská Bystrica, Slovakia
³State Geological Institute of Dionýz Štúr, Mlynská dolina 1, 817 01 Bratislava, Slovakia

Abstract

Six occurrences of Medieval mine workings are known in the area of Divínsky háj hill between Divín and Lovinobaňa villages. The major one in the area of 500 × 10–130 m was a subject of drilling of 14 diamond and RC holes. Supergene gold mineralization is hosted in faulted and folded argillized and limonitized Permian to Triassic schists, sandstones, and quartzites of the Veporic Unit. The ore bodies are irregular, related to crossing of NW–SE trending tectonic zones dipping 40–60° to NE and metamorphic foliation, mainly close to contact of schists with quartzites and with barren quartz veins. The thickness of ore bodies varies between 1 and 15 m. The grade in holes ranges from 0.01 to 8.86 ppm of Au. Oxidation zone reaches up to 40–50 m. Gold is of high fineness, 950 in average. Except clays and limonite, barite is the only mineral accompanying supergene gold. The character of primary mineralization and the source of Au are unknown.

Key words: gold mineralization, supergene enrichment, Medieval mines, Divín, Veporic Unit

Manuscript received: 2016-04-04

Revised version accepted: 2016-11-18