Computer Science – Sound
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p51g..08d&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #P51G-08
Computer Science
Sound
0994 Instruments And Techniques, 1829 Groundwater Hydrology, 5109 Magnetic And Electrical Properties (0925), 5419 Hydrology And Fluvial Processes, 5494 Instruments And Techniques
Scientific paper
Detection of liquid water on Mars is a key exploration objective, but geophysical methods currently in use or under consideration for subsurface exploration (radar and seismic, respectively) are not optimal for water detection. Electromagnetic (EM) sounding is sensitive to water with even modest dissolved solids, and brines are a near-ideal EM target. The magnetotelluric technique is a passive, low-frequency EM sounding method that can be compactly implemented and is capable of the characterization of groundwater from depths ranging from 100 m to 10 km or more on Mars. With support from NASA planetary and Mars instrument programs, we have developed an autonomous magnetotelluric sensor platform and demonstrated it at several field-test sites in Idaho's eastern Snake River Plain, the terrestrial type location for planetary plains-style basaltic volcanism. Soundings up to two kilometers deep detected the contact between aqueously altered tuff and relatively unaltered basalt, a proxy for the water table on Mars. We will discuss passive EM methodologies, our instrument development effort and field-test results, and the use of low-mass, passive instrumentation to enable deep subsurface exploration on future Mars Scout or network missions.
Delory Gregory T.
Espley Jared
Farrell William M.
Grimm Robert E.
Houser J.
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