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Data report: testing and deployment of the new APCT-3 tool to determine in situ temperatures while piston coring1

Martin Heesemann,2 Heinrich Villinger,2 Andrew T. Fisher,3 Anne M. Tréhu,4 and Steffen White5


During Integrated Ocean Drilling Program Expedition 311, the third-generation advanced piston corer temperature (APCT-3) tool, a new downhole tool to determine in situ formation temperatures while piston coring, was successfully tested and deployed for the first time. Its development was partly driven by the need to replace the advanced piston corer temperature tools, which were lost or damaged during many successful deployments over the last 15 y. Additionally, many important scientific problems require instruments having greater stability, accuracy, measurement frequency, and robustness than were available in the past. During all nine deployments during Expedition 311, the APCT-3 tool proved to be robust, reliable, and user-friendly regarding its mechanics, electronics, and operation software. In addition, the test deployments also provided temperature data that were important for achieving expedition objectives. Moreover, it was demonstrated that the APCT-3 tool is capable of measuring temperatures with a resolution and absolute accuracy (depending on careful calibration) of ~1 mK at a sampling interval of 1 s, an improvement of about one order of magnitude compared to earlier instrumentation.

1Heesemann, M., Villinger, H., Fisher, A.T., Tréhu, A.M., and White, S., 2006. Data report: testing and deployment of the new APCT-3 tool to determine in situ temperatures while piston coring. In Riedel, M., Collett, T.S., Malone, M.J., and the Expedition 311 Scientists. Proc. IODP, 311: Washington, DC (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.311.108.2006

2Universität Bremen, Department of Geosciences, Klagenfurter Strasse, 28359 Bremen, Germany. Correspondence author:

3Institute of Geophysics and Planetary Physics and Department of Earth Sciences, University of California, Santa Cruz, 1156 High Street, Santa Cruz CA 95064, USA.

4Expedition 311 Scientists' addresses.

5ANTARES Datensysteme, GmbHRudolf-Diesel-Strasse 6, 828816 Stuhr, Germany.

Publication: 28 October 2006
MS 311-108