Nonlinear inversion of gravity profile data for depth, radius and geometry determination of anomaly source, a case study: Aji Chai salt dome

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Eshaghzadeh ata; Mortezavi Nahid Sadat

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Journal: JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS Year:2017 | Volume:3 | Issue:1 Page(s): 65-86

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Title

Nonlinear inversion of gravity profile data for depth, radius and geometry determination of anomaly source, a case study: Aji Chai salt dome

Author(s)

Eshaghzadeh ata | Mortezavi Nahid Sadat | Issue Writer Certificate

Keywords

Amplitude Coefficient

Shape Factor

Gravity

Salt Dome

Nonlinear Inversion

Abstract

A Nonlinear Inversion technique using a fast method is developed to estimate successively the depth, Shape Factor and Amplitude Coefficient of a buried structure using residual Gravity anomalies along a survey line. By defining the anomaly value at the origin and the anomaly value at different points on the survey line, the problem of depth estimation is transformed into a problem of solving a nonlinear equation of the form f (z) = 0. Knowing the depth of the anomaly source, we can estimate the Shape Factor, and finally, the Amplitude Coefficient of the anomaly. Using the Amplitude Coefficient, we can also compute the radius of the anomaly. This technique is applicable for a class of geometrically simple anomalous bodies, including semi-infinite vertical cylinder, infinitely long horizontal cylinder, and sphere. The efficiency of this technique is demonstrated using the Gravity anomaly due to a theoretical model with and without random errors. Finally, the applicability of the technique is illustrated using the residual Gravity anomaly of a Salt Dome, situated near Miyaneh, northeast of Iran. The interpreted depth and other model parameters are in good agreement with the known actual values of the parameters. The estimated depth, radius, Shape Factor and the Amplitude Coefficient values of the Salt Dome are 64. 63 m, 34. 8 m, 1. 43 and-472 mGal, respectively....

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APA: Copy

Eshaghzadeh, ata, & Mortezavi, Nahid Sadat. (2017). Nonlinear inversion of gravity profile data for depth, radius and geometry determination of anomaly source, a case study: Aji Chai salt dome. JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS, 3(1 ), 65-86. SID. https://sid.ir/paper/268598/en

Vancouver: Copy

Eshaghzadeh ata, Mortezavi Nahid Sadat. Nonlinear inversion of gravity profile data for depth, radius and geometry determination of anomaly source, a case study: Aji Chai salt dome. JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS[Internet]. 2017;3(1 ):65-86. Available from: https://sid.ir/paper/268598/en

IEEE: Copy

ata Eshaghzadeh, and Nahid Sadat Mortezavi, “Nonlinear inversion of gravity profile data for depth, radius and geometry determination of anomaly source, a case study: Aji Chai salt dome,” JOURNAL OF RESEARCH ON APPLIED GEOPHYSICS, vol. 3, no. 1 , pp. 65–86, 2017, [Online]. Available: https://sid.ir/paper/268598/en

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