Multi Sensor Track

Hi crew:

The 1.5-m sections of core are now brought inside the lab where they are allowed to equilibrate with ambient room temperature on a rack(see inset
on picture). Before they are split, described and analyzed, a variety of geophysical and physical measurements are on the whole-round sections,including natural gamma and thermal conductivity. Today’s picture shows the Multi-Sensor Track (MST), which collects 4 types of data: gamma-ray porosity (a proxy record for the water content and porosity of the sediment), magnetic susceptibility (a proxy for how much magnetic-bearing minerals are in the sediments), p-wave velocity (how fast compression sound waves travel through the sediments), and resistivity (electrical resistivity of the sediments).Measurements are taken every 5 cm along the length of each section. It takes about 10 minutes to run each section. Some of these data are more useful than others. A shot of the data screen shows the measured values as the core passes along the track.

The cores then go to the splitting room.

More tomorrow. Has the snow vanished yet?

Mark L.

PS: We had 2 Thursday Feb 26 this week! Yesterday (Thursday) we were 16
hours ahead of East Coast Time, we crossed the international dateline,
and now we're 8 hours (Thursday again) behind you!!