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SynoPSIs -- Expedition 364: Joint IODP-ICDP Drilling the Chicxulub impact structure

Wednesday, April 19, 2017
Joanna
Morgan

In 2016 a joint IODP-ICDP expedition drilled the peak ring within the Chicxulub impact structure in Mexico. The aims of  Expedition 364 were to investigate: (1) the nature and formational mechanism of peak ring, (2) how rocks are weakened during large impacts, (3) the nature and extent of postimpact hydrothermal circulation, (4) the deep biosphere and habitability of the peak ring, (5) the recovery of life in a potentially, sterile zone, and (6) any observations from the core that may help us constrain the volume of dust and climatically active gases released into the stratosphere by this impact.
Core was recovered between 505.70 and 1334.73 mbsf, and included: ~110 m of Eocene and Paleocene sedimentary rocks, ~130 m of suevite (impact breccia) and clast-poor impact melt rock, and ~590 m of uplifted highly-fractured and shocked granitic basement rocks.  There was excellent core recovery, and the recovered core and wireline logs are of
excellent quality.

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