INVER2DBASE—A program to compute basement depths of density interfaces above which the density contrast varies with depth

Chakravarthi, V.; Singh, S. B.; Babu, G. Ashok

doi:10.1016/s0098-3004(01)00035-8

Cited by 28 publications

(15 citation statements)

References 20 publications

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“…A constant density is adopted in modeling schemes (Bhattacharyya and Navolio, 1975). The change in the boundary of the mass contrast and differential density values at various depths should be taken into consideration in modeling procedures (Chakravarti et al, 2001).…”

Section: Two-dimensional Forward Model Of the Gravity Datamentioning

confidence: 99%

Exploration and assessment of the geothermal resources in the Hammam Faraun hot spring, Sinai Peninsula, Egypt

Zaher

Saibi

Nishijima

et al. 2012

Journal of Asian Earth Sciences

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Section: Two-dimensional Forward Model Of the Gravity Datamentioning

confidence: 99%

Exploration and assessment of the geothermal resources in the Hammam Faraun hot spring, Sinai Peninsula, Egypt

Zaher

Saibi

Nishijima

et al. 2012

Journal of Asian Earth Sciences

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“…where, G is the universal gravitational constant and du dv dw is the volume of an elementary mass, and DqðzÞ is the density contrast represented by the parabolic density function at a given depth, z = w, as described by CHAKRAVARTHI et al (2001) and CHAKRAVARTHI and SUNDARARAJAN (2004),…”

Section: Gravity Anomaly Of a 25-d Vertical Prism With Pdpmentioning

confidence: 99%

“…; N À 1,P N À1 ¼ A and P N ¼ B. The process of interpretation begins by calculating the initial depth estimates (CHAKRAVARTHI et al, 2001) of a sedimentary basin assuming that the gravity anomaly at each observation x k is produced by a 2-D infinite horizontal slab in which the density contrast varies according to equation (2) as…”

Section: Inversion Of Gravity Anomaliesmentioning

confidence: 99%

“…LITINSKY (1989) used a hyperbolic density function to calculate the thickness of a sedimentary basin using the Bouguer slab formula; which however, incurs considerable error that is inversely proportional to the width of the basin. Since no closed form analytical gravity expressions could be derived in the space domain with an exponential density-depth function, CHAKRAVARTHI et al (2001) used a parabolic density function to invert gravity anomalies of 2-D basement interfaces.…”

Section: Introductionmentioning

confidence: 99%

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Gravity Anomalies of 2.5-D Multiple Prismatic Structures with Variable Density: A Marquardt Inversion

Chakavarthi

Natarajan

2006

Pure appl. geophys.

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We present an inversion technique based on the Marquardt algorithm to estimate the depth of a 2.5-D sedimentary basin in addition to the regional gravity anomaly that is associated with the residual gravity anomaly, wherein the density contrast varies parabolically with depth. Forward modeling is carried out through a derived analytical gravity expression of a 2.5-D vertical prism. Inversion of a theoretical gravity anomaly with and without a regional gravity anomaly illustrates the procedure that it is found to be insensitive to the regional gravity effect. Furthermore, the algorithm is exemplified with the gravity anomalies of the derived density-depth model of the Godavari subbasin, India with a parabolic density profile resulting in a more consistent geological model rather than a constant density profile. The main advantage of this method is that it works well even when the profile of interpretation does not bisect the strike length of the sedimentary basin.

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“…1A) with the computed initial depths of the observated gravity data. The depths will improve with increasing iteration.The density contrast between the top of sediments and the basement increase parabolically with depth [7]. The program code is written in the matlab software which enables to obtain depth estimates of a sedimentary basin and naturally bedrock morphology from the measured gravity fields.…”

Section: Introductionmentioning

confidence: 99%

3-D gravity modeling of basement reliefs an offshore case study in the Persian gulf, Iran

Eshaghzadeh¹,

parto²,

Moini³

2014

International Journal of Basic and Applied Sciences

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In this paper we have proposed a three-dimensional approach to determine depth of basement in which the density contrast varies parabolically with depth. This program based on Newton's forward difference formula that with optimization of gravity anomalies calculate depths of basement reliefs indeed are anticlinal and synclinal structures has been buried under sediments. This structures are the causes of the positive and negative gravity anomalies. We assume the measured gravity fields have been distributed on a horizontal plane and also sedimentary basin is combined of juxtaposition 3-D cubic prisms. The measurement stations of the gravity field (grid nodes) coincide with center blocks. The initial depth is computed using gravity data and the estimated depths are adjusted with iteration. The advantage of the method is utilization of positive and negative gravity anomalies together as two inputs for written algorithm as well as application of a coded non-linear filter. The efficiency of the code is illustrated with a set of synthetic gravity anomalies. Further, the code is exemplified with the gravity anomalies of an offshore case study in the Persian Gulf, Iran. The purpose of exploratory project in this area will include the development of Hydrocarbon Fields.

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INVER2DBASE—A program to compute basement depths of density interfaces above which the density contrast varies with depth

Cited by 28 publications

References 20 publications

Exploration and assessment of the geothermal resources in the Hammam Faraun hot spring, Sinai Peninsula, Egypt

Exploration and assessment of the geothermal resources in the Hammam Faraun hot spring, Sinai Peninsula, Egypt

Gravity Anomalies of 2.5-D Multiple Prismatic Structures with Variable Density: A Marquardt Inversion

3-D gravity modeling of basement reliefs an offshore case study in the Persian gulf, Iran

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