Record details

Title
    Mathematical modelling of tektite formation
Statement of responsibility
    Pavel Kalenda, Petr Pecina
Other titles
    Mathematisches Modell für die Bildung von Tektiten
Author
    Kalenda, Pavel
    Pecina, Petr
Language
    anglicky
Source title - serial
    Zeitschrift für geologische Wissenschaften
Vol./nr.
    Vol. 30, no. 3
Pages
    p. 201-212
Year
    2002
Notes
    1 obr., 4 diagr.
    1 obr., 4 diagr., 3 s. bibl.
    České, německé resumé
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Z. geol. Wiss.
Classfication no.
    550.2
    552
Conspectus category
    55
    552
Subject group
    dynamika
    jevy šokové
    kráter Ries
    kvartér Českého masivu
    model matematický
    moldavit
    petrogeneze
    tektity
    teplota
Geographical name
    Česká republika
    SRN
Keyword
    Formation
    Mathematical
    Modelling
    Tektite
Abstract (in english)
   The solution of the equation of motion of ablating bodies moving in the Earth's atmosphere which was tested numerically on the example of moldavites, revealed that the density and mass distribution of tektites in particular strewn fields can be explained by the different trajectories of non-homogeneous target materials during their flight in the atmosphere. The mathematical model describes the basic physical principles of the tektite creation process. From this model follows from that the formation of tektites took place in conglomerates of many pieces of rock debris thrown up into the atmosphere after the impact, especially in the first (ascending) phase, during which the debris was heated through by atmospheric drag. The impact itself does not generate tektites but creates metamorphosed rocks and impact glasses in situ.
   To create tektites, it is necessary to throw up relatively large volume of material at a large velocity, so that part of the solid debris can penetrate through the troposphere into the stratosphere. The generation of tektites is determined mainly by the kinetic parameters of the impactor and the target material
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    5. 12. 2006
    24. 10. 2007
Import date
    8. 8. 2012