Maršov manganese oxides occurrence, Maršov, Brno-Country District, South Moravian Region, Czech Republici

Regional Level Types
Maršov manganese oxides occurrence	Occurrence (Abandoned)
Maršov	Municipality
Brno-Country District	District
South Moravian Region	Region
Czech Republic	Country

South of Maršov is an area with occurrences of hydrothermal vein mineralization.
The most important occurrence of hydrotermal Pb-Zn ore mineralization is in the ravine "Stříbrná zmola" and in the forest area "Nad studánkou" - Mátl, Herink, Daňko (1963), where there are poorly preserved remains after the prospecting of polymetallic ores (dumps, pits, small collapsed adits).
On dumps and in clasts or boulders in alluvium/deluvium, barite-quartz, carbonate-barite and barite veins and veinlets (sometimes with fluorite) with small aggregates of primary Pb-Zn ore minerals and with coatings of secondary ore minerals can be found - Houzar, Hrazdil, Hršelová, Toman (2021).
Similar vein material without ore mineralization can often be found in the forest areas of "Čertova hráz", "Na salaši", "Habří" and "Bílé skály".
Hydrothermal veins penetrate the rocks of the Bílý potok Group (predominantly phyllites), the Deblín Group (predominantly paragneiss, migmatites) and the Závist Květnice Group (predominantly Devonian quartzites and limestones).
The thickness of the veins/veinlets is usually from cm to dm.

In the territory south of Maršov in the forest areas "Na salaši", "Habří" and "Bílé skály" there are many remains of mine workings from prospecting for Mn-Co ores. The average Mn content in the ore was 18.5 %, the average Co content was 0.2 % (Janečka 1956).
Mn ores, formerly referred to as "psilomelan" or "asbolan" often form kidney-shaped concretions or coatings on clasts in a clay residue rich in Fe. The predominant minerals are cryptomelane, hollandite - Exner, Doubek (1998).
Concretions can be found on mine working dumps and in a ravine on the E edge of area "Habří". Fragments of concretions in deluvium are also common in the field area "Příhon" and "Nad habřím".

Fossils

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References