The pressure core sampler (PCS) is a tool designed to recover a 1385-cm3 cylindrical sediment core at in situ pressure (Pettigrew, 1992). Quantity and composition of gas in a sediment sample at depth can be determined by releasing gas from the PCS at the surface. Shipboard data collected from PCS deployments on Leg 164 are of great interest to the scientific community because they provide the only direct information concerning in situ gas quantities and composition in deep-sea sedimentary sequences (Dickens et al., 1997). A portion of total data collected from the PCS was published in "Downhole Tools and Sampling" sections of site chapters in the Leg 164 Initial Reports volume (Paull, Matsumoto, Wallace, et al., 1996). Here we present the shipboard PCS data not included in the Initial Reports volume because of time constraints. Suggested improvements for future PCS data collection also are noted here. Interpretations based on PCS data are discussed elsewhere in this volume and by Dickens et al. (1997).
1Paull,
C.K., Matsumoto, R., Wallace, P.J., and Dillon, W.P. (Eds.), 2000. Proc. ODP,
Sci. Results, 164: College Station, TX (Ocean Drilling Program).
2School of Earth
Sciences, James Cook University, Townsville, QLD, 4811 Australia. Jerry.Dickens@jcu.edu.au
3Department of
Geology, University of North Carolina, Chapel Hill, NC 27599-3315, U.S.A.
4Present address: Exxon
Exploration Company, P.O. Box 4778, Houston, TX 77210-4778, U.S.A.
5Federal Institute for
Geosciences, P.O. Box 510153, D-30631, Hannover, Federal Republic of Germany.
6Present address:
Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing, CA
95039-0628, U.S.A.
7Shipboard
Scientific Party is given in the Preliminary
Pages.
Date of
initial receipt: 16 April 1998
Date of acceptance: 12 January 1999
Ms 164SR-243