Delineation of subsurface geological fractures in the Cambay rift and surrounding regions of NW India: an integrated approach using satellite derived EIGEN-6C4 gravity data

Chouhan, Avinash Kumar; Singh, Dinesh Kumar; Pal, Sanjit Kumar; Choudhury, Pallabee

doi:10.1080/10106049.2020.1716395

Cited by 28 publications

(4 citation statements)

References 35 publications

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“…The horizontal gradient map is rather simple to interpret and requires no assumption about the source parameters. The location of maxima of horizontal gradient magnitude can be simply identified by visual inspection (Chouhan, Singh, Pal, & Choudhury, 2020; Pal & Majumdar, 2015; Pal, Narayan, Majumdar, & Kumar, 2016; Sahoo & Pal, 2019).…”

Section: Resultsmentioning

confidence: 99%

Insights into crustal architecture and tectonics across Palghat Cauvery Shear Zone, India from combined analysis of gravity and magnetic data

et al. 2020

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The Palghat Cauvery Shear Zone (PCSZ), which dissects the Southern Granulite Terrane (SGT), evoked much attention for last two-three decades as it offers an enticing opportunity to understand Precambrian tectonics. Many studies suggest that it is a suture zone or a terrane boundary, but tectonic evolution is mainly derived from structural and geochronological evidences. The present gravity-magnetic study provides insight into both shallow and deeper crustal architecture and addresses the issues related to validation/modification of the existing tectonic realm. A total of 3,650 gravity and magnetic measurements were made covering 8,640 km 2 area, represented by high-grade metamorphic rocks and acid intrusives of Archean to Neoproterozoic age. Representative rock samples were also collected for determination of petrophysical properties (density and susceptibility) which have augmented the understanding of gravity-magnetic signature. The gravity anomaly map and subsequent modelling suggest an occurrence of a high-density batholith at mid-crustal level at the central part of the area. The magnetic anomaly map reveals that ENE-WSW trending linear magnetic low zone is coincident with a residual gravity high, which probably indicates the fossil of an oceanic crust. The horizontal gradient of gravity-magnetic data reveals the shallow crust, which is bounded by Palghat Cauvery Shear Zone (PCSZ) and Dharapuram Shear Zone (DSZ), and separates two terranes in terms of density and susceptibilities. The study suggests N-S verging compressional tectonics had led to closure of an ocean, imprints of which is well manifested in gravity and magnetic maps.

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Section: Resultsmentioning

confidence: 99%

Insights into crustal architecture and tectonics across Palghat Cauvery Shear Zone, India from combined analysis of gravity and magnetic data

et al. 2020

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“…faults, folds, fractures, joints, geological contacts etc., is a very important step in studying the tectonic framework and the hydrocarbon trapping mechanisms of sedimentary basin. Identifying geological features such as fractures, dykes, faults, folds, joints, and geological contacts is crucial when analyzing the tectonic framework and mechanisms for hydrocarbon trapping in sedimentary basins [3,4,5,35,42] Thus, gravity survey and magnetic method are the primary methods in geophysical exploration as a regional structural mapping tool [2,3,6,10,12,16,18,26,29]. The magnetic and gravity methods are relatively cheap, nondestructive, non-invasive geophysical techniques.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Sedimentry Thickness and Structural Paramaters of Binji and Its Environs, Part of Sokoto Basin North-west Nigeria, Using Satellite Gravity and Aeromagnetic Data Analysis

Shehu,

Ali

2024

Preprint

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In this study, we assessed depth to basement (Sedimentary thickness) and structural parameters of Binji and its environs, part of Sokoto Basin using an integrated analysis of aeromagnetic and satellite gravity data, to ascertain the viability for hosting hydrocarbon potentials of the study area. Source parameter imaging, Euler deconvoultion and Spectral analysis were employed to determine the Structural and sedimentary thickness, while Analytical signal, center for exploration target and vertical derivatives was used to enhance the structural features and lineament in the study area. The Results from the power spectral analysis revealed that the average thickness of the sediments varies from 0.865 km to 3.74 km from magnetic anomaly map and 0.112 km to 5.02 km from bouguer gravity map. The SPI estimates depth to magnetic source ranging from 0.931 km to 5.174 km from magnetic anomaly map and depth range between 515m to 3315m from bouguer map. Euler solution for Magnetic anomaly map revealed structural depths ranging from -628m to 1624m for (SI= 0) and depths ranging from 3012m to 3865m for (SI= 1). Whereas Euler Solution for bouguer anomaly map show depth range between -683m to 5078m for (SI= 1), and depths ranging from 832m to 5474m for (SI= 2). Both The gravity and magnetic derivatives map show predominant SW-NE, SW-EW and E-W structural trend. The whole work implies that, hydrocarbon prospect is possible in Sokoto Basin as depth of oil and gas maturation of most West African prospect start from 2.3km depth.

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“…Such information is important as it can provide valuable data on geological structures, which will help in the search for potential mineral ore deposit sites. Regarding the complex geodynamics of northern Cameroon, the extraction of linear anomalies for the identification of the subsurface structure, such as lithological contacts, faults, folds, and fractures, is important for the interpretation of the potential field data (Chouhan, Singh, Pal, & Choudhury, 2020; Pham, 2020; Pham, Eldosouky, Oksum, & Saada, 2020; Pham, Oksum, Le, Ferreira, & Le, 2021; Zhang, Hao, Wu, Jiang, & Xu, 2013). Satellite‐derived gravity models have recently been widely employed for various structural and tectonic investigations, particularly where direct terrestrial data acquisition is scarce or problematic (Braitenberg, 2015; Ghomsi et al, 2020, 2022, b; Li, Braitenberg, & Yang, 2013; Odera, 2019; Sobh, Mansi, Campbell, & Ebbing, 2018).…”

Section: Introductionmentioning

confidence: 99%

Delineating structural features of North Cameroon using the EIGEN6C4 high‐resolution global gravitational model

Ghomsi

Pham²,

Steffen

et al. 2022

Geological Journal

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The Cretaceous basins of the West and Central African Rift System (WCARS) are characterized by sinistral strike-slip movements observed between the Benue and Arabian-Nubian microplates. These basins share a similar basin-filling structure, history, and tectonic processes. They have attracted a significant interest in the study of their geodynamics and subsurface structure through geophysical exploration methods. Nevertheless, North Cameroon located in this microplate confluence has not yet been investigated in terms of identifying geological structures, such as lineaments and faults. To contribute to a better understanding of the northern Cameroon structural framework and its tectonic context, we investigate the lineaments in northern Cameroon by using the EIGEN-6C4 gravitational model and a variety of recent processing techniques (Tilt derivative [TDR], Theta Map [TM], Horizontal tilt angle [TDX], and Edge Detector [ED]). Our results show that the lineaments are trending in ENE-WSW, NW-SE, NE-SW, and WNW-ESE directions. These directions are consistent with the Cretaceous Garoua Rift and granitoids of the Cameroon-Chad line. The presented result clearly delineates continuous architectonic features of the structural edges of the Saharan Metacraton, the Cretaceous Garoua Rift, the Bibemi-Léré granitoids, and the Adamawa faults.

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Delineation of subsurface geological fractures in the Cambay rift and surrounding regions of NW India: an integrated approach using satellite derived EIGEN-6C4 gravity data

Cited by 28 publications

References 35 publications

Insights into crustal architecture and tectonics across Palghat Cauvery Shear Zone, India from combined analysis of gravity and magnetic data

Insights into crustal architecture and tectonics across Palghat Cauvery Shear Zone, India from combined analysis of gravity and magnetic data

Assessment of Sedimentry Thickness and Structural Paramaters of Binji and Its Environs, Part of Sokoto Basin North-west Nigeria, Using Satellite Gravity and Aeromagnetic Data Analysis

Delineating structural features of North Cameroon using the EIGEN6C4 high‐resolution global gravitational model

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