Measured temperature and pressure dependence of Vp and Vs in compacted, polycrystalline sI methane and sII methane-ethane hydrate
We report on compressional- and shear-wave-speed measurements made on compacted polycrystalline sI methane and sII methane-ethane hydrate. The gas hydrate samples are synthesized directly in the measurement apparatus by warming granulated ice to 17??C in the presence of a clathrate-forming gas at high pressure (methane for sI, 90.2% methane, 9.8% ethane for sII). Porosity is eliminated after hydrate synthesis by compacting the sample in the synthesis pressure vessel between a hydraulic ram and a fixed end-plug, both containing shear-wave transducers. Wave-speed measurements are made between -20 and 15??C and 0 to 105 MPa applied piston pressure.
Citation Information
Publication Year | 2003 |
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Title | Measured temperature and pressure dependence of Vp and Vs in compacted, polycrystalline sI methane and sII methane-ethane hydrate |
DOI | 10.1139/p03-016 |
Authors | M.B. Helgerud, W.F. Waite, S. H. Kirby, A. Nur |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Canadian Journal of Physics |
Index ID | 70026195 |
Record Source | USGS Publications Warehouse |