Record details

Title
    Geology of occurrences of ferruginous sanstones in North Bohemia: Famous localities revisited
Statement of responsibility
    Jiří Adamovič, Jaromír Ulrych, J. Peroutka
Other titles
    Geologie der Vorkommen von eisenführenden Sandsteinen in Nordböhmen: Berühmte Fundstellen neu betrachtet
Author
    Adamovič, Jiří, 1965-
    Peroutka, J.
    Ulrych, Jaromír
Language
    anglicky
Source title - serial
    Geologica saxonica
Vol./nr.
    Jg. 46-47
Year
    2001
Notes
    16 obr., 1 tab., 2 pl., 2 s.bibl.
    il.
    Německé resumé
    Zkr. název ser.: Geologica saxon.
Subject group
    alkalický typ
    česká křídová pánev
    dajka
    ferikrusta
    kenozoické vulkanity Českého masivu
    křída-svrchní
    lokalita geologická
    měření magnetické
    metasomatóza
    pískovce
    reliéf
    terciér
    vulkanismus
    zóna riftová
    železo
Geographical name
    ČR-Čechy
    Doksy (Česká Lípa)
    Houska (Česká Lípa)
    Kokořín (Mělník)
    Křenov (Česká Lípa)
    Mšeno (Mělník)
    Pavlovice (Česká Lípa)
    Vlhošť (Jičín)
Keyword
    Bohemia
    Famous
    Ferruginous
    Geology
    Localities
    North
    Occurrences
    Revisited
    Sanstones
Abstract (in english)
   Sediments of the Bohemian Cretaceous Basin experienced a complicated thermal history in the late Cretaceous and Cenozoic, related to multiphase volcanic activity associated with the Ohře Rift in the NW and the Labe Volcano-Tectonic Zone in its axial part. In places, matrix of quartzose sandstone was replaced by secondary cement of Fe-oxyhydroxides. Ferritization and its relation to basaltic bodies was studied by means of field mapping. tectonic study and surface geomagnetic survey at the calssical localities of Borek, Pavlovice, Vlhošť and Husa near Česká Lípa, Kamenný vrch near Dubá, and Střezivojický Špičák, Houska and Pokličky near Mšeno. Three morphological types of ferritization wee distinguished: 1. subvertical tabular bodies several centimetres thick, filling open joints and faults and associated with dyke contacts, 2. thin, undulating crusts, often tube- and sheath-like in spahe, mostly forming subvertical zones several meters or tens pf meters wide, and 3.
   stratabound subhorizontal bodies up to 6 m thick. The following factors were found to be most important for the distribution of ferritization in sandstones of the Bohemian Cretaceous Basin: i. proximity of basaltic bodies, ii. the degree of fracturing of the host sediment and favourable orientation of feeder-structures, and iii. sufficient permeability of the host sediment
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    13. 2. 2008
Import date
    8. 8. 2012