Because of the low recovery at Site 1117 only Core 180-1117A-1R was analyzed on the multisensor track (MST). Thermal conductivity and velocity were measured from discrete rock slices or pieces of split core in order to preserve intact fabrics. Unconfined compressive strength was measured in the fault gouge at the top of the recovered succession (Cores 180-1117A-1R and 2R), but no vane shear strength measurements could be conducted. Lack of recovery at Holes 1117B and 1117C prevented acquiring physical properties measurements. All physical properties data collected at Site 1117 are presented in Table T8, except the MST data. A compilation of MST data (in ASCII format) is presented on the accompanying LDEO CD-ROM.
Fault gouge material was found to have bulk densities between 2.14 and 2.28 g·cm-3. Grain densities range from 2.75 to 2.80 g·cm-3. Porosity values are between 28.6% and 32.3%. Pocket penetrometer measurement of unconfined compressive strength yielded values between 65 and 90 kPa. Higher strength was recorded for intervals exhibiting scaly fabrics and micro shear folds. Transverse velocities range from 1992 to 2038 m·s-1. To avoid damage to the fault gouge fabrics with the needle probe, thermal conductivity was taken with the half-space device on the split core face. Results range from 1.32 to 1.75 W·m-1·ºC-1.
Selected cubes and a minicore of metadolerite and gabbro were prepared from the recovered section below 18.6 mbsf. Bulk and grain density are 2.76 and 2.82 g·cm-3, respectively. Porosity is only 2.95%. Transverse velocities range from 6076 to 6432 m·s-1, whereas longitudinal velocities are 5991 to 6337 m·s-1. Thermal conductivity was found to be highly variable, ranging from 1.15 W·m-1·ºC-1 (Section 180-1117R-9R-1) to up to 3.78 W·m-1·ºC-1 (Section 180-1117A-12R-1). However, this variation in thermal conductivity may relate to a measurement bias, because the lowest values correspond to the smallest piece of half core.