Inversion of gravity data with an exponential density contrast model
نویسنده
چکیده
We have derived an analytical expression in the wavenumber domain for calculating the gravity anomaly caused by an exponential density contrast model for an interface (Xia and Sprowl, 1990), above which the density contrast changes exponentially with depth. Constant density contrast and a linear density contrast are specific cases of the exponential density contrast model. The formula should be more efficient than vertical prism methods for linear or exponential density contrast. The formula is tested using synthetic data. We employ the approach presented by Xia and Sprowl (1992) to invert the regional gravity anomaly of Kansas to determine depth to the Moho discontinuity with an exponential density contrast model. The inversion is constrained by seismic refraction along the twodimensional profile from Concordia, Kansas to Agate, Colorado (Steeples and Miller, 1989). The average density model in the crust of Kansas is also determined.
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