Three-dimensional analysis of gravity anomalies of sedimentary basins by polygonal prismatic model with a quadratic density function

1993 ◽  
Vol 140 (3) ◽  
pp. 455-469 ◽  
Author(s):  
D. Bhaskara Rao ◽  
N. Ramesh Babu
Keyword(s):  
Density Function ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
Quadratic Density Function

Analysis of gravity anomalies of sedimentary basins by an asymmetrical trapezoidal model with quadratic density function

Geophysics ◽  
1990 ◽  
Vol 55 (2) ◽  
pp. 226-231 ◽  
Author(s):  
D. Bhaskara Rao
Keyword(s):  
Density Function ◽  
Quadratic Function ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
Variable Density ◽  
Constant Density ◽  
Quadratic Density Function ◽  
Marquardt Algorithm ◽  
Damping Parameter ◽  
Godavari Basin

The decrease of density contrast with depth in many sedimentary basins can be approximated by a quadratic function. The interpretation of gravity anomalies over sedimentary strata can be more realistic if variable density contrasts, rather than constant density contrasts, are assumed. I derive the equation for the gravity anomaly of an asymmetrical trapezoidal model, assuming a quadratic density function, and I develop methods of interpretation, using the Marquardt algorithm. While interpreting a synthetic anomaly profile, the convergence of the algorithm is shown by plotting the values of the objective function, damping parameter, and various parameters of the model with respect to iteration number; the results are superior to those obtained when using constant density contrasts. In addition, I apply the method in the interpretation of gravity anomalies over the San Jacinto graben and the lower Godavari basin.

Interpretation of Gravity Anomalies Over an Inclined Fault of Finite Strike Length With Quadratic Density Function

1990 ◽  
Vol 21 (3-4) ◽  
pp. 169-173 ◽  
Author(s):  
B. Bhaskara Rao ◽  
M. J. Prakash
Keyword(s):  
Density Function ◽  
Gravity Anomalies ◽  
Quadratic Density Function ◽  
Inclined Fault

A two- and three-dimensional analysis of gravity anomalies associated with the East Pacific Rise at 9°N and 13°N

1990 ◽  
Vol 95 (B4) ◽  
pp. 4967 ◽  
Author(s):  
John A. Madsen ◽  
Robert S. Detrick ◽  
John C. Mutter ◽  
Peter Buhl ◽  
John A. Orcutt
Keyword(s):  
Dimensional Analysis ◽  
East Pacific Rise ◽  
Three Dimensional ◽  
Gravity Anomalies ◽  
East Pacific

Three-dimensional analysis of gravity anomalies in the Mark Area, Mid-Atlantlc Ridge 23°N

1991 ◽  
Vol 96 (B3) ◽  
pp. 4355-4366 ◽  
Author(s):  
E. Morris ◽  
R. S. Detrick
Keyword(s):  
Dimensional Analysis ◽  
Three Dimensional ◽  
Gravity Anomalies

Analysis of gravity anomalies over an inclined fault with quadratic density function

1985 ◽  
Vol 123 (2) ◽  
pp. 250-260 ◽  
Author(s):  
D. Bhaskara Rao
Keyword(s):  
Density Function ◽  
Gravity Anomalies ◽  
Quadratic Density Function ◽  
Inclined Fault

scholarly journals Gravity anomalies of a trapezoidal model with quadratic density function

1986 ◽  
Vol 95 (2) ◽  
pp. 275-284
Author(s):  
D Bhaskara Rao
Keyword(s):  
Density Function ◽  
Gravity Anomalies ◽  
Quadratic Density Function

Three‐dimensional Fourier gravity inversion with arbitrary density contrast

Geophysics ◽  
1992 ◽  
Vol 57 (1) ◽  
pp. 131-135 ◽  
Author(s):  
F. Guspí
Keyword(s):  
Frequency Domain ◽  
Three Dimensional ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
Variable Density ◽  
Density Contrast ◽  
Gravity Inversion ◽  
Linear Quadratic ◽  
Space Domain ◽  
Depth Functions

The use of variable‐density contrasts in gravity inversion has gained increasing importance in recent years due to the necessity of constructing more realistic models of geophysical structures such as sedimentary basins. Linear, quadratic, and exponential variations, either in the space or in the frequency domain, are the basis of several methods. See, among others, the papers by Granser (1987), Chai and Hinze (1988), Reamer and Ferguson (1989), and Rao et al. (1990). Guspí (1990) used polynomial density‐depth functions for inverting gravity anomalies into 2-D polygons in the space domain.

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