Record details

Title
    Pádová pole vltavínů
Statement of responsibility
    Vladimír Bouška
Other titles
    The moldavite strw field
    Sborník referátů 7.konference o vltavínech - Znojmo 1996 (Variant.)
Author
    Bouška, Vladimír
Language
    česky
Source title - serial
    Přírodovědný sborník Západomoravského muzea v Třebíči
Vol./nr.
    Roč. 31
Pages
    s. 5-20
Year
    1997
Notes
    1 obr., 5 fot., 3 tab., 3 s.bibl.
    eng
Subject group
    geografie
    jihočeské pánve
    kenozoikum
    kvartér Českého masivu
    miocén-střední
    moldavit
    paleolimnologie
    sedimentace fluviální
    sedimentace lakustrinní
    tektity
    transport
Geographical name
    Bratčice (Brno-venkov)
    Česká republika
    České Budějovice
    Ivančice (Brno-venkov)
    Jankov (České Budějovice)
    Lhenice (Prachatice)
    Radomilice (České Budějovice)
    Rakousko-Niederösterreich
    SRN-Sachsen
    Třebíč
    Třeboň (Jindřichův Hradec)
    Vrábče (České Budějovice)
    Znojmo
Keyword
    Pádová
    Pole
    Vltavínů
Abstract (in english)
   The greatest number of moldavites have been found in Southern Bohemia (České Budějovice - Třeboň area), corresponding to about 77.3% of all finds. Moravian moldavites present 19.5% of all moldavite finds, while Radomilice area in Southern Bohemia possesses only 3.1% of moldavites of the whole strewn field and the Lusatian area only 111 pieces found up to day, the Cheb area 20 and Austrian area about 15 moldavites. The fall of moldavites 15 million years ago (at the boundary between the Middle and Upper Badeniar was not homogenous and this inhomogeneity has been preserved in the moldavite strewn field in spite of later redeposition into younger sediments. The main differences in the chemical composition, trace element contents and a number of other parameters, e.g.
   colour distribution, bubble in the glass matter, the variance in oxygen isotopes and maximum projection sphericity values, have remained preserved for several groups of localities and led to the distinguishing of moldavite partial strew fields or subfields. It can be stated that certain areas with moldavites of similar properties are Radomilice area (most acidic, low alkalies content), the moldavites from the České Budějovice - Třeboň area as well as the Cheb area and moldavites found in Austria with frequent bubbles and lechatelierite grains and the moldavites from Moravia and Lusatia (low CaO + MgO contents relatively higher total iron and alumina).
   Stratigraphically, the moldavite-bearing sediments belong to the Lower Sarmatian (greenish-grey sandly clays with montmorillonite, loc.: Vrábče-Nová hospoda, Jankov, Besednice-brickyard) to Lower Romanian (Formation of moldavite-bearing sandy gravels (or feldspathic sandy gravels, loc.: Chlum nad Malší, Ločenice, Koroseky, Slavětice, moldavites from the Cheb area and Lusatian occurrences), to Pleistocene gravels (Radomilice, localities in the surrounding of Znojmo (and slope loams and scree (Brusná) or Holocene alluvia along the present-day rivers. Moldavites from the Horn region in Austria most probably could have been transported from the southern part of the Třeboň Basin by Pliocene or Pleistocene streams or the could belong to a small independent strew subfield
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    6. 5. 2008
Import date
    8. 8. 2012