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L03_GravCorrAnalysis-page9

L03_GravCorrAnalysis-page9 - Gravity Anomalies 2D forward...

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Applied Geophysics – Corrections and analysis Spreadsheet: Grav2Dcolumn Gravity Anomalies: 2D forward calculation for rectangular parallelepipeds with greater vertical extent than horizontal see Dobrin and Savit eq 12-34 Define density structure Adjust bold numbers… coulum center (km) density contrast (g/cm3) top (km) bottom (km) error check 0 0.5 0 0 OK 1 0.5 0 0 OK 2 0.5 0 0 OK 3 0.5 0 0 OK 4 0.5 2 8 OK 5 0.5 0 0 OK 6 0.5 0 0 OK 7 0.5 0 0 OK 8 0.5 0 0 OK 9 0.5 0 0 OK 10 0.5 0 0 OK 11 0.5 0 0 OK 12 0.5 0 0 OK 13 0.5 0 0 OK 14 0.5 0 0 OK 15 0.5 0 0 OK 16 0.5 0 0 OK 17 1 0 0 OK 18 0.5 0 0 OK 19 0.5 0 0 OK 20 0.5 0 0 OK Calculated gravity anomaly 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 0 2 4 6 8 10 12 14 16 18 20 distance (km) dgz (mGal) 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 depth (km) Applied Geophysics – Corrections and analysis Spreadsheet: Grav2Dcolumn Gravity Anomalies: 2D forward calculation for rectangular parallelepipeds with greater vertical extent than horizontal see Dobrin and Savit eq 12-34 Define density structure
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