SAMPLING PLANSampling guidelines and policy are available at the following site: http://www-odp.tamu.edu/publications/policy.html. The Sample Allocation Committee (SAC), which consists of the two co chiefs, staff scientist, and ODP curator onshore or curatorial representative aboard ship, will work with the entire science party to formulate a formal Leg 195-specific sampling plan for shipboard and postcruise sampling.
For Leg 195, we expect to recover ~200 m of serpentine mudflows, ~400 m of sediment, and <100 m of basalt. The volume and frequency of samples taken from the working half of the core must be justified on a scientific basis and will be dependent on core recovery, the full spectrum of other requests, and the cruise objectives. All sample requests must be made on the standard World Wide Web sample request form and approved by the SAC. Leg 195 shipboard scientists may expect to obtain a sufficient number of sediment samples to perform postcruise research and as many as 100 basalt or serpentine mud samples of no more than 15 cm3 in size. Additional samples may be obtained upon written request to ODP/TAMU (Texas A&M University) after initial data are analyzed. Depending on the penetration and recovery during Leg 195, the number of samples taken may be increased by the shipboard SAC. For example, studies requiring only small sample volumes (1 cm3 or less, e.g., for veins, fluid inclusions, etc.) may require more than 100 samples to characterize a long section of core. The SAC will review the appropriate sampling interval for such studies as the cores are recovered. Samples larger than 15 cm3 may also be obtained with approval of the SAC. Especially sampling at MAF-4B will require whole rounds for geotechnical experiments. Requests for large samples must be specified on the sample request form. Sample requests may be submitted by shore-based investigators as well as the shipboard scientists. Based on sample requests received two months precruise, the SAC will prepare a temporary sampling plan, which will be revised on the ship as needed. Some redundancy of measurements is unavoidable, but minimizing redundancy of measurements among the shipboard party and identified shore-based collaborators will be a factor in evaluating sample requests.
If some critical intervals are recovered (e.g., fault gauge, ash layers, basement veins, etc.), there may be considerable demand for samples from a limited amount of cored material. These intervals may require special handling, a higher sampling density, reduced sampling size, or continuous core sampling by a single investigator. A sampling plan coordinated by the SAC may be required before critical intervals are sampled.
Logging Plan | Table of Contents