PhD student Sietze de Graaff wrote this very complete and detailed paper showing how the impact melt material formed within the 200 km size Chicxulub impact structure, based on the material recovered by the IODP-ICDP drilling in 2016 within the peak-ring part of the structure. The work is based on detailed petrography and geochemical analyses carried out at AMGC and partners, in particular the group around Christian Koeberl at University of Vienna, the GTime unit at Université Libre de Bruxelles, as well as the University of Texas, Austin.
Great job Sietze.
Read it here, published in Geological Society of America Bulletin