Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3420203n&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 20, CiteID L20203
Physics
1
Physical Properties Of Rocks: Permeability And Porosity, Planetary Sciences: Solid Surface Planets: Physical Properties Of Materials, Structural Geology: Fractures And Faults
Scientific paper
A rock mass rating (RMR) analysis was performed on an outcrop of Burns Formation at Meridiani Planum, Mars. RMR values were calculated for the present dry conditions (RMR = 63) and past wet conditions (RMR = 52). For present-day dry conditions, the rock mass has an in situ modulus of deformation (E*) of 21.1 GPa, cohesive strength (C*0) of 4.64 MPa, and tensile strength (T*0) of -0.24 MPa. These values were reduced by at most ~50% during previous water-saturated conditions. The critical grain crushing pressure (P*) for dry conditions is 19.5 GPa, with an uncertainty of about an order of magnitude. Analysis of the rover observations indicates that the physical properties of Burns Formation are in the range of analogous terrestrial porous rock masses such as sandstone and shale.
Nahm Amanda L.
Schultz Richard A.
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