Formation temperature measurements and core orientation

Temperature measurements are planned for all sites to reconstruct the thermal gradient at each location. Four measurements are planned at one hole per site using the advanced piston corer temperature tool. The thermal gradient at each site will help constrain the history of burial diagenesis of the sediments encountered.

In addition, the FlexIt orientation tool will be used in the first hole cored at each site to orient all APC cores as needed. This instrument uses three orthogonally mounted fluxgate magnetometers to record the orientation with respect to magnetic north of the double lines scribed on the core liner. The tool also has three orthogonally mounted accelerometers that monitor the movement of the drill assembly and help determine when the most stable, and thus most useful, core orientation data are gathered. Declination, inclination, and temperature are recorded internally at regular intervals until the tool’s memory capacity is filled.