Peering inside the peak ring of the Chicxulub Impact Crater—its nature and formation mechanism

The IODP‐ICDP Expedition 364 drilled into the Chicxulub crater, peering inside its well‐preserved peak ring. The borehole penetrated a sequence of post‐impact carbonates and a unit of suevites and clast‐poor impact melt rock at the top of the peak ring. Beneath this sequence, basement rocks cut by p...

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Bibliographic Details
Published inGeology today Vol. 35; no. 2; pp. 68 - 72
Main Authors Urrutia‐Fucugauchi, Jaime, Pérez‐Cruz, Ligia, Morgan, Joanna, Gulick, Sean, Wittmann, Axel, Lofi, Johanna
Format Journal Article
LanguageEnglish
Published Oxford Blackwell Publishing Ltd 01.03.2019
Wiley
Subjects
Basement rock
Boreholes
Carbonates
Collapse
Earth Sciences
Expeditions
Geophysics
Oceanography
Rock
Rocks
Sciences of the Universe
Sequencing
Uplift
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Summary:The IODP‐ICDP Expedition 364 drilled into the Chicxulub crater, peering inside its well‐preserved peak ring. The borehole penetrated a sequence of post‐impact carbonates and a unit of suevites and clast‐poor impact melt rock at the top of the peak ring. Beneath this sequence, basement rocks cut by pre‐impact and impact dykes, with breccias and melt, were encountered at shallow depths. The basement rocks are fractured, shocked and uplifted, consistent with dynamic collapse, uplift and long‐distance transport of weakened material during collapse of the transient cavity and final crater formation.
ISSN:0266-6979
1365-2451
DOI:10.1111/gto.12261