IODP Expedition 309/312: Superfast Spreading Rate Crust 2 and Superfast Spreading Rate Crust 3
Figure 8

Temperature profile of Hole 1256D recorded by the Temperature Acceleration Pressure (TAP) and Environmental Mechanical Sonde (EMS) tools during Expeditions 309 and 312. Excursions between 900 and 950 mbsf, and 1350 and 1400 mbsf are evident, as is the temperature increase by nearly 18ºC from beginning to end of the Expedition 312 bottom hole temperature measurement. Also shown are caliper data indicating good correlation between enlarged borehole diameter and negative temperature excursions in some parts of Hole 1256D (e.g., ~950 mbsf).