Record details

    Electronically conducting brittle-ductile shear zones in the crystalline basement of Rittsteig (Bohemian Massif, Germany): Evidence from self potential and hole-to-surface electrical measurements
Statement of responsibility
    Jürgen Bigalke, Andreas Junge, Gernold Zulauf
    Bigalke, Jürgen
    Junge, Andreas
    Zulauf, Gernold
Source title - serial
    International journal of Earth sciences (Geologische Rundschau)
    Vol. 93, no. 1
    p. 44-51
    8 obr.
    Bibliografie na s. 50-51
    Zkr. název ser.: Int. J. Earth Sci. (Geol. Rdsch.)
Classfication no.
Conspectus category
Subject group
    deformace duktilní
    kdyňský masiv
    měření geoelektrické
    metoda vlastních potenciálů
    moldanubikum Šumavy
    profil vrtný
    vodivost elektrická
    zóna střižná
Geographical name
    Nýrsko (Klatovy, Nýrsko)
    Rittsteig (SRN-Bayern)
Abstract (in english)
   Crustal-scale shear zones may act as prominent electrical conductors given that sufficient amounts of graphite or fluids are present. There are several graphite-enriched shear zones within the 583-m-deep Rittsteig drilling (Bavaria, Germany), two of which are of major importance. One shear zone cuts through Moldanubian biotite-muscovite schists at 320 m depth. The other shear zone separates Teplá-Barrandian amphibolites from Moldanubian biotite-muscovite schists at 460 m depth. To detect these shear zones adjacent to the drilling, the self-potential method and the non-linear impedance spectroscopy have been applied.
   From the new data, obtained from hole-to-surface and surface measurements, we conclude that (1) graphite is pervasively distributed within the Rittsteig shear zones resulting in powerful electronic conductors, (2) the graphite-bearing shear zones are dipping moderately towards the S, and (3) the shear zone drilled at 320 m depth extends to the Earth's surface where it has been detected ca. 400 m to the N of the drilling. As the graphite-bearing shear zones of both the Rittsteig drilling and the German Continental Deep Drilling (KTB) developed in the brittle-ductile regime of quartzofeldspathic rocks, we argue that the brittle-ductile boundary layer may act as a significant graphite attractor in the continental crust
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    7. 4. 2008
Import date
    8. 8. 2012