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THE FINAL SETTLING OF METEORITIC MATTER ON THE PEAK-RING OF THE CHICXULUB IMPACT STRUCTURE AT SITE M0077A OF IODP-ICDP EXPEDITION 364

  • Steven Goderis
  • , Honami Sato
  • , Ludovic Ferrière
  • , Birger Schmitz
  • , David Burney
  • , Timothy J. Bralower
  • , Sietze Jan De Graaff
  • , Thomas Déhais
  • , Niels De Winter
  • , Mikael Elfman
  • , Jean-Guillaume Feignon
  • , Sean P. S. Gulick
  • , Akira Ishikawa
  • , Pim Kaskes
  • , Christian Koeberl
  • , Per Kristiansson
  • , Christopher M. Lowery
  • , Joanna Morgan
  • , Clive R. Neal
  • , Jeremy D. Owens
  • Toni Schulz, Matthias Sinnesael, Jan Smit, Johannes Vellekoop, Michael T. Whalen, Alex Wittmann, Frank Vanhaecke, Stijn Van Malderen, Philippe Claeys

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademic

Abstract

Introduction: The ~66.0 Myr old, ~200 km diameter Chicxulub impact structure marks the K/Pg boundary and is the only terrestrial crater with an unequivocal peak-ring. In 2016, the International Ocean Discovery Program (IODP) and the International Continental Scientific Drilling Program (ICDP) jointly drilled the 1335 m deep Site M0077A into the Chicxulub peak ring offshore the Yucatán Peninsula and successfully recovered a continuous core from 505.7 to 1334.7 mbsf (meters below sea floor). The core is mainly composed of three lithological units: ~110 m of Paleogene sedimentary rocks (post-impact interval), ~130 m of suevite and impact melt rock (upper peak-ring interval), and ~610 m of granitoid basement, intruded by pre-impact dikes and intercalated with suevites and impact melt rocks [1]. This abstract focuses on Core 40R-Section 1 (616.24‒617.68 mbsf), which samples the ~75 cm “transitional unit” between the upper impactites and early Paleogene sediment. This unique interval of the core, marked by siderophile element enrichments and pyrite-rich intervals, is studied here in detail to better constrain the final phases of impact crater formation and determine the fate of the Chicxulub impactor.
Original languageUndefined/Unknown
Title of host publicationLarge Meteorite Impacts VI 2019 (LPI Contrib No. 2136)
PublisherLunar and Planetary Institute
Publication statusPublished - 2019
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 14 - Life Below Water
    SDG 14 Life Below Water

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