Monterey Bay Aquarium Research Institute

Transient fluid flow in convergent margin and hydrate settings: Two phase flow and silent slip events

Kevin Brown, Ph.D.
Scripps Institution of Oceanography

Wednesday, January 14, 2004
Pacific Forum 3:00 p.m.

In the next century a whole series of large tectono-hydrogeologic and biogeochemical problems will be addressed through long term observations and interdisciplinary studies that include both surface and subsurface IODP instrumentation. Hydrologic systems have both progressive decadal to centennial trends, and interspersed short violent events are to be expected that are driven by: (1) Multiphase phase flow (gas, water, steam hydrocarbons), (2) Changes in permeability resulting from the formation and/or destruction of hydrates or other mineral phases (plus associated volume changes), (3) Tectono-hydrologic processes associated with fault rupture or creep or unstable slope conditions, and (4) Oceanographic effects. I will show examples from two very different types of systems where our recently developed flow metering systems have recorded transient flow episodes that last anywhere from several hours to months.