Jakub Vácha

• Master of Science
• PhD Student at Masaryk University

The planned pilot CO2 storage Zar-3 is an oil field with a gas cap in the final production stage in the SE Czech Republic. It is composed of a dolomite Jurassic reservoir sealed by three different formations that differ significantly in lithology. Previous studies left open questions on the nature of pore space and connectivity and the quality of t...

Paragenetic relations, chemical variability and Raman spectroscopy of harrisonite Raman spectrum of harrisonite from Czech phosphate pegmatites and type locality Arcedeckne was researched.

Sborník Jihočeského muzea v Českých Budějovicích, Přírodní vědy 63 / 114–115 / 2023 (in Czech) An exceptionally large (115 g) oxyspinel group mineral sample was found between Křemže and Brloh villages (Czech Republic) by the second author in 2021. The unpolished part of the sample was analyzed using SEM coupled with EDS. The analysis yielded an en...

Horní Halže – Mýtinka is a mineral occurrence located near Mýtinka in the Krušné hory Mts. In the past, the area was intensively mined for iron (namely hematite in quartz veins). Quartz veins are located on complicated intersections of fault systems in mica schists and migmatites (Urban – Crkal 2021). Recently, Sejkora et al. (2021) described rich...

Conversion of a nearly depleted oil and gas field Zar-3 in SE Czech Republic to a pilot CO2 storage site is under preparation in a joint project of the Czech Geological Survey, MND company, VSB Technical University in Ostrava and NORCE research institute in Norway. First, an updated geological static 3D model is being built using Petrel (Slb). The...

Harrisonite, a rare silicate-phosphate from granitic pegmatites of the Bohemian Massif Harrisonite, CaFe 2+ 6 (SiO 4) 2 (PO 4) 2 , is a rare silicate-phosphate described as a rock-forming mineral from highly metamorphosed garnetites (originally BIF) from Canada. Disregarding several questionable anthro pogenic occurrences of harrisonite, the minera...

Torbernite (Cu(UO 2) 2 (PO 4) 4 ·12H 2 O) or its dehydrated metamorphic product, metator-bernite, was found in two samples from granitic pegmatite outcropping near Šejby, Czech Republic. Samples representing (meta)torbernite are a small solitary beryl crystal (in the collection of the South Bohemian Museum in České Budějovice) and a larger pegmatit...

Strongly carbonatized alkaline rocks and a carbonatite s. s. (xenolith) were discovered in the R-2 drillcore in the Roztoky Intrusive Complex (Figs 1, 2, 7; Rapprich et al. 2017). Both carbonate-rich rock types contain minerals of critical elements reported for the first time in the alkaline volcanic rocks of the České středohoří Mts. These include...

Minerál, 28, 2, 162-164. České Budějovice.

V jádrovém vrtu R-2 odvrtaném nedaleko Roztok nad Labem byl v minulosti prokázán výskyt silikokarbonatitu v metráži 154 m (Rapprich et al., 2017) a xenolitu karbonatitu v metráži 286,5 m (Mysliveček, 2019). V těchto karbonatických horninách byly identifikovány mj. i (Ca)-REE fluorkarbontáty. Na metráži 154 m (silikokarbonatit) byl z REE fází naleze...

Minerál, 27, 1, 51-53. České Budějovice.

Altogether, 40 mollusc species were recorded during the research of five localities in the Tichá Orlice River valley (East Bohemia, Czech Republic). The high species richness is in accordance with high habitat diversity of the studied area. One new species (Oxychilus glaber) was recorded for the first time in the Tichá Orlice River valley.

Minerál, 25, 2, 131-134. České Budějovice.

Minerál, 24, 3, 257-263. České Budějovice.