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A gravimetric 3D Global inversion for cavity detection 1
Author(s) -
Camacho A.G.,
Vieira R.,
Montesinos F.G.,
Cuéllar V.
Publication year - 1994
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1994.tb00201.x
Subject(s) - gravimetric analysis , geology , borehole , inversion (geology) , karst , residual , economic geology , regional geology , hydrogeology , engineering geology , sink (geography) , mineralogy , geodesy , seismology , telmatology , volcanism , chemistry , mathematics , algorithm , geotechnical engineering , paleontology , cartography , organic chemistry , geography , tectonics
A gravimetric survey, covering a site 200 m square, was carried out in order to locate karstic cavities. After eliminating the regional trend using a polynomial fit, the residual is modelled by least‐squares prediction. Correlated signals for several wavelengths are detected. The inversion of these anomalies is performed by a global 3D adjustment using spherical bodies as models. The adjustment is repeated in order to obtain a stable configuration. The results show the probable presence of a system of cavities and galleries. Data collected from boreholes and the subsequent appearance of sink‐holes are consistent with the results.