Geo468K_GravAnomalies

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Unformatted text preview: topex.ucsd.edu/marine_grav/ Gulf of Mexico Satellite Gravity Data Gulf of Mexico Satellite Gravity Data Gulf of Mexico Satellite Gravity Data GOCE: Gravity Field and Steady-State Ocean Circulation Explorer GOCE: MOHO Mapping GOCE: MOHO Mapping GOCE: Boxer Day Earthquake How large do you expect an anomaly to be? Get order of magnitude es2mates based on the point mass model (4/3)πΔρr3G/z2 Or the infinite slab formula 2πρGz depending on the geometry of the situa2on. How large do you expect an anomaly to be? Example: Cave hun2ng How large does a cave need to be to make it discoverable? Use the point mass anomaly to judge magnitude which sets required accuracy. Must assume that the cave is filled with something. Air? Water? Milk? Magma? This contrast in density controls the situa2on. How large do you expect an anomaly to be? Example: Alluvial fill in a channel deposit. What is the depth of alluvial fill in a channel deposit? Use the half space formula with assumed density contrasts. What geologic evidence could help you es2mate the density of the channel deposit? What if you knew the provenance? How large do you expect an anomaly to be? Example...
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This note was uploaded on 02/02/2014 for the course GEO 468k taught by Professor Staff during the Spring '08 term at University of Texas at Austin.

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