Podrobnosti záznamu

Název
    Variations in magnetic anisotropy and opaque mineralogy along a kilometer deep profile within a vertical dyke of the syenogranite porphyry at Cínovec (Czech Republic)
Autor
    Chlupáčová, M.
    Hrouda, F.
    Novák, Jiří Karel
Jazyk
    anglicky
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Journal of Volcanology and Geothermal Research
Svazek/č.
    Roč. 113, -
Strany
    s. 37-47
Rok
    2002
Poznámky
    Projekt: GA205/95/0149, GA ČR
    Projekt: GA205/96/0272, GA ČR
    Projekt: IAA3013903, GA AV ČR
    Rozsah: 11 s.
Předmětová kategorie
    Bohemian Massif
    magnetic anisotropy
    syenogranite porphyry
Klíčové slovo
    Along
    Anisotropy
    Cínovec
    Czech
    Deep
    Dyke
    Kilometer
    Magnetic
    Mineralogy
    Opaque
    Porphyry
    Profile
    Republic
    Syenogranite
    Variations
    Vertical
    Within
Abstrakt (anglicky)
   Vertical variations in magnetic fabric and paragenesis of the ferrimagnetic minerals for a virtually upright dyke of the Altenberg syenogranite porphyry were investigated using profile data of borehole E-16 to a depth of 922.7 m (Eastern Krušné hory Mts., NW Bohemia). It was revealed that this dyke likely consists of two magma pulses indicated both by magnetic fabric and by opaque mineralogy. In most of the profile, the magnetite grains are oriented parallel to the sub-vertical dyke. Only at the base of the upper magma pulse, in a depth interval of 200-400 m, are these grains oriented sub-horizontally being thus perpendicular to the dyke walls. This pattern can be interpreted as a consequence of a static vertical compaction of the magma of the basal portions of the upper pulse due to the pressure of the ascending lower pulse. The large planes of the ferrimagnetic minerals are oriented perpendicular to the shortening direction.
Přispěvatel
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
    U
Datum importu
    8. 8. 2012