Processes of Planetary Faulting Revealed Through High-Resolution Topography

Details Processes of Planetary Faulting Revealed Through High-Resolution Topography Processes of Planetary Faulting Revealed Through High-Resolution Topography

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufm.p41a0391s&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #P41A-0391

Other

6225 Mars, 8010 Fractures And Faults, 8020 Mechanics, 8107 Continental Neotectonics, 8149 Planetary Tectonics (5475)

Scientific paper

Faulting generates clear topographic signals at the planetary surface that can be related to the style and geometry of the faults at depth. The displacement distribution along a fault (its offset at the surface) reveals the strength of rock adjacent to the fault's tipline, the deformability of the surroundings, mechanical interaction and incipient linkage with nearby faults, and the presence of mechanically significant subsurface layers. DEMs that portray the amplitude and position of surface topography (uplift and subsidence) due to fault slip can be inverted for depth of faulting, which for sufficiently large faults is related to the stability of frictional sliding and thereby to the paleogeothermal gradient at the time of faulting. Knowledge of the 3-D fault geometry of faults in a region is then easily converted into the magnitude and direction of brittle strain accommodated by the fault population. Displacement-length scaling relations contain information on fault interaction, subsurface stratification, and variations between planets. Examples from Mars illustrate the power and utility of topography as a tool in planetary structure and tectonics.

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