(7) |

where *S*_{h} is the hydrate saturation of the pore space. The bulk and shear
moduli of
the solid phase are now a mixture of the sediment solid and the hydrate and
can be calculated from the Hill average:

where *K*_{s} and *G*_{s} are the bulk and shear moduli of the sediment without hydrate and *f*_{h} is the volume fraction of hydrate in the solid phase. It can
be calculated as follows:

(9) |

The dry and saturated moduli can then be determined using equations 3, 4, 5 and 6.

10/9/1997