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doi:10.2204/iodp.sp.308.2005
Shipboard and shore-based researchers should refer to the interim IODP Sample, Data, and Obligations policy posted on the World Wide Web at iodp.org/data_samples.html. This document outlines the policy for distributing IODP samples and data to research scientists, curators, and educators. The document also defines the obligations that sample and data recipients incur. Access to data and core sampling during Expedition 308, or within the 1 y moratorium, must be approved by the Sample Allocation Committee (SAC). The SAC (composed of Co-Chief Scientists, Staff Scientist, the IODP Curator on shore, and the Curatorial Representative on board ship) will work with the Shipboard Scientific Party to formulate a formal expedition-specific sampling plan for shipboard and postcruise sampling.
Shipboard scientists are expected to submit sample requests 2 months before the beginning of the expedition. Sample requests may be submitted at iodp.tamu.edu/curation/samples.html. Based on sample requests (shore-based and shipboard), the SAC and Shipboard Scientific Party will prepare a working cruise sampling plan. This plan will be subject to modification depending upon the actual material recovered and collaborations that may evolve between scientists during the expedition. Modifications to the sampling plan during the expedition require the approval of the SAC.
All sample frequencies and sizes must be justified on a scientific basis and will depend on core recovery, the full spectrum of other requests, and the cruise objectives. Some redundancy of measurement is unavoidable, but minimizing the duplication of measurements among the shipboard party and identified shore-based collaborators will be a factor in evaluating sample requests.
Cruise-Specific Sampling Needs
One critical component of Expedition 308 is establishing the in situ fluid pressure, effective stress, and hydrologic properties of the sediments from the seafloor to 1000 mbsf. To accomplish these goals, it is critical that 10–20 cm long whole-round samples be taken at regular intervals and sealed for shore-based geotechnical measurements. In addition to the routine whole rounds, it is mandatory that whole rounds be taken at the depth of each T2P measurement.
The whole-round samples are required to calibrate the in situ measurements, to constrain sediment properties for hydrogeologic models, and to measure the strength of the sediments for stability analyses.