Downhole logging is scheduled for all holes deeper than 400 m, which currently includes Sites TSO-2B and TSO-6A. At these sites, the Triple Combo, Formation MicroScanner (FMS), and Geological High-resolution Magnetometer (GHMT) will be deployed to develop continuous high resolution paleoclimate records and augment the results of coring. The Triple Combo tool string provides measurements of spectral gamma ray, porosity, density, and electrical resistivity. The FMS tool string produces high-resolution electrical resistivity images of the borehole wall that can be used to study the structure of bedding, diagenetic features, hiatuses, and cyclicity recorded by sediments. A sonic tool will be run with the FMS to provide acoustic data useful in establishing synthetic seismograms and seismic line calibration. The GHMT provides both continuous in situ magnetic susceptibility and the vertical component of the total magnetic field data. If the remnant magnetization of the sediments is sufficiently stong, the total field measurement of the GHMT can provide magnetic reversal stratigraphy.
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