Site M0077: Introduction

Abstract

During International Ocean Discovery Program Expedition 364, open-hole drilling occurred from the seafloor to ~500 m drilling depth below seafloor (DSF) and core was recovered between 505.70 and 1334.69 meters below seafloor (mbsf). Attempts to recover drilling chips from the open-hole interval were largely unsuccessful due to loss of drilling fluid into the formation. In the upper cores, the Post-Impact Sedimentary Rocks interval was recovered between 505.70 and 617.33 mbsf. The Upper Peak Ring interval is composed of suevite above impact melt rock from 617.33 to 747.02 mbsf. The Lower Peak Ring interval is formed from granitoids intruded by pre-impact mafic and felsic dikes between 747.02 and 1334.69 mbsf, interspersed with suevite and impact melt rock.