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Mode of Occurrence and Composition of Impact-Generated and Impact-Modified Formations

  • Victor L. MasaitisEmail author
  • Mikhail S. Mashchak
  • Mikhail V. Naumov
  • Tatjana V. Selivanovskaya
Chapter
Part of the Impact Studies book series (IMPACTSTUD)

Abstract

Interior structure of the Puchezh-Katunki astrobleme and composition and distribution of impact-transformed and impact-generated formations are described based on data obtained from extensive drilling and geophysical surveys. Three main morphostructural elements are distinguished: (1) outer ring terrace (outer ring terrace) of 15–30 km wide complicated by narrow and shallow radial trough and overlain by a thin blanket variegated allogenic breccia; (2) annular trough with an outer diameter of 40–42 km and depth ca. 1.9–1.6 km, filled with various allochtonous impact-derived rock units (mainly allogenic breccias after sedimentary rocks) overlain by crater lake deposits and more recent sediments; (3) central uplift of 8–10 km in diameter and up to 2 km high with a central pit up to 0.5 km deep. The latter is composed of blocks of both crystalline basement and sedimentary rocks; it stand out sharply by strong gravity and magnetic highs.

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Victor L. Masaitis
    • 1
    Email author
  • Mikhail S. Mashchak
    • 1
  • Mikhail V. Naumov
    • 1
  • Tatjana V. Selivanovskaya
    • 1
  1. 1.A.P. Karpinsky Russian Geological Research InstituteSt. PetersburgRussia

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