At 67°12.7' N, 02°56.2' E (water depth = 1289 m) near Hole 642E, operations began by drilling to ~180 meters below seafloor (mbsf) with 103/4 inch casing and reentry cone. The bottom of the cased hole was sealed with cement to ensure against formation fluids entering the borehole interval where the measurements are made, and then the CORK and thermistor string were installed.
The operational plan for the new hole at Site 642 precluded a logging program in that hole. To assess current background thermal conditions in the region, however, a downhole record of temperature from Hole 642E was obtained using the Lamont-Doherty Earth Observatory (LDEO) high-temperature tool. In addition to the temperature tool, the triple combination (triple combo) and Formation MicroScanner (FMS) tool strings were run.