Mineralogical study for the formation process of large impact craters

Abstract

The Chicxulub impact structure in the northern Yucatan Peninsula, Mexico formed at 66.0 Ma, was drilled by the joint IODP-ICDP Expedition 364 in April-May 2016. This is the first attempt to obtain materials from the topographic peak ring within the crater previously identified by seismological observations. In this talk, the mineralogy and petrology of impactites and basement granitoids in the recovered core samples is briefly outlined as keys to understand the formation processes of large impact craters.