Clathrate hydrates, commonly referred to as gas hydrates, are
crystalline, ice-like phases of water that physically trap
"guest" molecules in cages created by the water crystal lattice.
Gas hydrates formed with methane as the guest species have been found in
continental margin and deep-sea sediments around the world. Because of the
large number of cages in the crystal structure, natural gas hydrate
deposits may contain an economically significant volume of natural gas
and/or play a role in global climate change. Additionally, gas hydrates
can dramatically alter the strength and other geotechnical properties of
sediments. To better understand gas hydrates and to help improve their
identification from seismic and well log data, my colleagues and I have
been studying the elastic properties of methane gas hydrate.
In this talk, I will present our measurements of compressional and
shear wave speeds in methane hydrate and compare the results with
measurements on ice.
Next: Zooplankton and Bioluminescence in Monterey Bay