At Site 1147, physical properties were measured on whole-round sections, split-core sections, and discrete samples from the latter. Whole-round core logging with the MST included GRA bulk density, MS, NGR, and P-wave velocity logging on all cores. Sampling intervals were 5 cm for all cores in the three holes. The P-wave logger (PWL) data were bad because of instrument problems and/or cracks or voids in the sediment cores. The PWL data are not shown in this report but are available from the Ocean Drilling Program JANUS database (see the "Related Leg Data" contents list). One thermal conductivity measurement per core was also performed on the whole-round sections. Color spectral reflectance was measured on the archive halves of all split cores at 4-cm intervals. Moisture, density and P-wave velocity were measured on discrete samples from split-core sections at intervals of one measurement per section (1.5 m) (see "Physical Properties" in the "Explanatory Notes" chapter).
Core physical properties measurements at Site 1147 display two distinct intervals: the upper interval, from 0 to 42 mcd; and the lower interval, from 42 mcd to the bottom of the hole (91 mcd). The transition between the two intervals is characterized by an apparent disconformity in the general trend of all data sets. Data from MS, GRA, and NGR all show a gently increasing general trend, whereas porosity, which decreases in the upper interval, is sharply offset at 42 mcd and then continues to decrease below that depth (Figs. F14, F15, F16, F17). The CSR values show a gently increasing trend from 37% to 43% in the upper interval and level off, varying around 43% below that depth (Fig. F18). P-wave velocities decline very gently from ~1493 to ~1487 m/s in the top 42 mcd and increase steadily to ~1520 m/s in the lower interval (Fig. F19). Grain density reveals significantly more scatter in the upper interval than below 42 mcd, superimposed on the general trend offset and indicating a greater degree of mineralogic variability (Fig. F17).
The general trends in the core-logging data (Figs. F14, F15, F16) and CSR (Fig. F18) are superimposed by large-amplitude cyclic fluctuations over the entire interval. These fluctuations are interpreted as glacial-interglacial compositional changes.
In Hole 1147C, the core temperature equilibration times were recorded for Cores 184-1147C-1H through 7H (Fig. F20). This test suggested that the cores need 5 hr to equilibrate to room temperature. For practical reasons, complete equilibration could not be achieved. A time of 2-3 hr was deemed reasonable according to the measurements because then the gradient of most equilibration curves becomes very small, and the difference between core temperature and ambient temperature in the core lab is negligible.