3-D forward gravity modeling of basement interfaces above which the density contrast varies continuously with depth

Chakravarthi, V.; Raghuram, H. M.; Singh, S. B.

doi:10.1016/s0098-3004(01)00080-2

Cited by 57 publications

(40 citation statements)

References 10 publications

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“…On the other hand, in order to determine the sedimentary basin configuration, CORDELL (1973) used the exponential depth-density relation, RAO (1990) proposed a quadratic density function, CHAI and HINZE (1988) developed an iterative algorithm in the frequency domain using an exponential density function, and VISWESWARA RAO et al (1993RAO et al ( , 1994 utilized the parabolic density function. CHAKRAVARTHI et al (2002) and CHAKRAVARTHI and SUNDARAJAN (2004) represented the sedimentary basins with a series of 3D-juxtaposed vertical prisms whose upper surface is the earth surface and bottom surface is at the bottom of the basin, and whose density contrast is constant.…”

Section: Methodsmentioning

confidence: 99%

Determination of the Crustal and Thermal Structure of the Erzurum-Horasan-Pasinler Basins (Eastern Türkiye) Using Gravity and Magnetic Data

Maden

Aydın

Kadirov

2014

Pure Appl. Geophys.

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The Erzurum-Horasan-Pasinler basin, which surrounds Miocene rocks, is oriented approximately E-W and is located in Eastern Anatolia (Türkiye). East Anatolia, where ophiolitic and young volcanic rocks are widespread, is situated in the Alpine-Himalayan fold-thrust fault belt. The NW-SE trending North Anatolian Transform Fault Zone and the NE-SW trending East Anatolian Transform Fault Zone, formed by the compressional regime of East Anatolia, control the main tectonics of the study region. While the Moho and Conrad depths of the study region are 43.0 and 20.9 km, respectively, the average sedimentary thickness has been determined to be 5.2 km by using the power spectrum method. On the other hand, it is found that the depth of the Moho in the region varies from 41.0 to 44.5 km and the depth of the Conrad discontinuity varies between 22 and 26 km, as computed using empirical equations. The basement of the sedimentary layer is calculated to be 6 km by using inversion results applied to the residual gravity data. The Curie point depth and average heat flow value in this region are calculated as 18.0 km and 89.1 m Wm -2 , respectively. Geotherm calculations reveal that the Moho temperature is 1,028.0°C based on the crustal model. The high heat flow values obtained are attributed to tectonic activities and melting of the lithospheric mantle caused by upwelling of the asthenosphere.

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Section: Methodsmentioning

confidence: 99%

Determination of the Crustal and Thermal Structure of the Erzurum-Horasan-Pasinler Basins (Eastern Türkiye) Using Gravity and Magnetic Data

Maden

Aydın

Kadirov

2014

Pure Appl. Geophys.

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“…The gravity response of sedimentary basin at any grid node (i, j) of a rectangular mesh (Fig. 1B) is given [9] as 11 ( , ,0)…”

Section: Methodsmentioning

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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“…We assume that the density contrast between the basement and the sedimentary basin varies parabolically with depth z, according to the following equation (Chakravarthi et al, 2002):…”

Section: Forward Problemmentioning

confidence: 99%

“…γ is the gravitational constant and xo j and yo j are the x and y coordinates of the jth prism center, respectively Chakravarthi et al (2002). have presented a closed form for the integral in Eq.…”

mentioning

confidence: 99%

Regularization parameter selection in the 3D gravity inversion of the basement relief using GCV: A parallel approach

Mojica¹,

Bassrei²

2015

Computers & Geosciences

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3-D forward gravity modeling of basement interfaces above which the density contrast varies continuously with depth

Cited by 57 publications

References 10 publications

Determination of the Crustal and Thermal Structure of the Erzurum-Horasan-Pasinler Basins (Eastern Türkiye) Using Gravity and Magnetic Data

Determination of the Crustal and Thermal Structure of the Erzurum-Horasan-Pasinler Basins (Eastern Türkiye) Using Gravity and Magnetic Data

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

Regularization parameter selection in the 3D gravity inversion of the basement relief using GCV: A parallel approach

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