S. Mackenzie, Modified by: C.Hurich, R.Johnson, R.Black; June, 1984; SIA version: Igor B. Morozov and Jingu Chen, 5/98. Revision for new Qt graphics: I. Morozov, 03/2004; The originakl Fortran code removed and the code merged with RAYINVR (also somewhat changed input parameter lists!): I. Morozov, 09/2007.
Gravity modeling (2-D)
In combinations with GRAPHIC, IMAGE, and GUI, The tool creates displays allowing interactiev editing of density models and fitting gravity anomaly observations.
The tool is actually a copy of tool RAYINVR with parameter lists limited to handling only density parameters. Anything performed by this module can also be done by RAYINVR. Note that in this preliminary version, the interactive displays will actually allw displaying and editing velocity and Q parameters.
2-D bodies of constant densities are described by closed countours within the subsurface. The bodies can overlap, in which case the density anomalies in the overlapping regions are also superimposed.
GUI, GRAPHIC, IMAGE, GMT
| *call | GRMOD2 | UNITS ADD BCKDENS MODEL | |
UNITS |
Units of distance: FEET, METERS, KM. Note: data will be converted to kilometers. |
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ADD |
Constant added to all anomaly values |
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BCKDENS |
Background density. This value is subtracted from the densities of the bodies input using BODY lists |
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MODEL |
Name of the model created. This name can be used for constructing an interactive modeling session using GUI |
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Talwani, M, Worzel, JL, and Landisman, Rapid Gravity Computations for Two-Dimensional Bodies with Application to the Mendocino Submarine Fracture Zone, Journal of Geophysical Research, 64:49-61.