Australoasijské tektity: Jen krok od objevu mateřského kráteru? // přednáška Mineralogické sekce SNM

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  • เผยแพร่เมื่อ 31 ธ.ค. 2024

ความคิดเห็น • 5

  • @auberonlamdinwhymark2827
    @auberonlamdinwhymark2827 หลายเดือนก่อน

    In your ballistic analyses did you take into account the parameters you can glean from Chapman (1964). Understanding the re-entry angles and velocities of tektites at specific locations allows you to work backwards with the ballistics. There are a range of solutions and they set a limit on where the crater can be located.

    • @jirimizera2639
      @jirimizera2639 หลายเดือนก่อน +3

      Dear Aubrey,
      This unfortunately is not my expertise. But Tim Harris did some suborbital analysis calculations shown in the slide following that on Chapman. I have made only some basic ballistic assumptions in our GSA Special Paper 553 contribution.

  • @liborbartas1763
    @liborbartas1763 หลายเดือนก่อน

    A předpokládaná velikost toho asteroidu a velikost kráteru který následně vytvořil ?

    • @auberonlamdinwhymark2827
      @auberonlamdinwhymark2827 หลายเดือนก่อน +2

      The most accurate estimate in my opinion is ~43 ± 9 km (Glass & Koeberl, 2006). If in soft sediment there could be enlargement by slumping. Estimates have varied widely, but as Mizera mentions in relation to Bolaven, the crater should be significantly larger than Ries Crater.

    • @jirimizera2639
      @jirimizera2639 หลายเดือนก่อน +1

      Kráter je odhadován na 30-120 km (průměr), čemuž by odpovídal asteroid o průměru 2-3 km.