MST: Multi-Sensor Whole Core Logger system
The Multi-Sensor Whole Core Logger system (MST) enables researchers and scientists to perform several geophysical measurements on the cores while still on board. There are four primary sensors and two secondary sensors that are designed to operate under computer control, but can be operated manually if desired.

The primary measurement sensors are:

  1. Ultrasonic traducers to measure the velocity of compressional waves in the core.
  2. Gamma ray source detector for measuring the loss of gamma rays through the core, which provides density and porosity values.
  3. Magnetic susceptibility sensor that can determine the amount of magnetic material in the sediments.
  4. An Electrical resistivity sensor that measures the electrical resistivity of the sediments in the core.

The two secondary measurement sensors are:

  1. Core diameter can be measured using compressional wave velocity recorded from the ultrasonic transducer and density from data collected by the gamma ray detector.
  2. Temperature is recorded from the area where the sediment is collected and is used to correct the variation in temperature, which occur during the logging process.


MSCL Schematic layout (Geotek Mscl Manual, 2000).

The MST bench.