Structural interpretation of potential field data using the enhancement techniques: a case study

Eldosouky, Ahmed M.; Pham, Luan Thanh; Duong, Van‐Hao; Ghomsi, Franck Eitel Kemgang; Henaish, Ahmed

doi:10.1080/10106049.2022.2120548

Cited by 39 publications

(11 citation statements)

References 109 publications

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“…Similarly, the magnetic anomaly can be divided into four anomaly zones: a low-negative anomaly zone in East Shandong (I), a high-positive anomaly zone in the Sulu UHP (II), a central low-negative anomaly zone (III), and an eastern high-positive anomaly zone (IV) (Figure 4a). However, notable disparities exist between the zoning outcomes presented by [41] (Figure 4b) and our findings, particularly in the eastern region of the SYS. Fundamentally, the division in this study is identified by using the characteristics of the magnetic anomaly gradient zones.…”

Section: Characteristics and Geological Significance Of The Magnetic ...contrasting

confidence: 91%

“…where Re refers to the real part, and p is a positive dimensionless scalar number defined by the interpreter and is a constant greater than or equal to 2 [77]. This study used p = 3 to yield the best results [41,46,78].…”

Section: Enhanced Gradient Amplitude (Ehga)mentioning

confidence: 99%

“…Ref. [41] used gravity data and multiple field boundary detectors to map the detailed structure of the Wadi Umm Ghalqa area in the southeastern desert of Egypt. Ref.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

Yao

et al. 2023

Minerals

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To further explore the geological structure and the Mesozoic–Paleozoic hydrocarbon prospects in the northern area of the South Yellow Sea (SYS), multiple geological and geophysical data were systematically gathered and compiled, including gravity and magnetic data, seismic surveys, drilling data, and previous research results. The characteristics and genesis of the gravity and magnetic anomalies are examined. This study employs residual gravity anomalies and multiple edge detection methods to identify fault lineament structures and assess the tectonic framework. Moreover, the study utilizes 2.5D gravity-seismic joint modellings and regression analysis to estimate the basement depth. Additionally, the study examines the basement characteristics and discusses the thickness of the Mesozoic–Paleozoic strata. Finally, the study further identifies prospects for hydrocarbons in the Mesozoic–Paleozoic. Our findings show that the faults are incredibly abundant and that the intensity of fault activity weakens gradually from NW to SE. Specifically, NE (NEE) trending faults are interlaced and cut off by NW (NWW), near-EW, and near-SN trending secondary faults, which form an en-echelon composite faults system with a dominant NE (NEE) orientation. Thick Mesozoic–Paleozoic strata are preserved, but we observe distinct variations in basement characteristics and the pre-Cenozoic structural deformation along the N-S direction. Therefore, the Northern Basin of SYS (NBSYS) and the Middle Uplift of SYS (MUSYS) are characterized by alternating sags and bulges in the S-N direction and in the E-W direction, respectively, forming a chessboard tectonic framework. Considering the oil and gas accumulation model, we identify three target hydrocarbon prospects in the NBSYS and two favorable hydrocarbon prospects in the MUSYS.

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Section: Characteristics and Geological Significance Of The Magnetic ...contrasting

confidence: 91%

Section: Enhanced Gradient Amplitude (Ehga)mentioning

confidence: 99%

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Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

Yao

et al. 2023

Minerals

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“…The TDR map (Figure 8A) highlights the different gravimetric domains, while the HG TDR map (Figure 8B) highlights the different contacts that delimit these different domains. It should be noted that the contacts obtained from the TDR and HGTDR are connected, complicating the geological interpretation (Eldosouky et al, 2022e). The EHGA filter is effective in highlighting a wide range of density structures in southwestern Cameroon.…”

Section: Discussionmentioning

confidence: 99%

Contribution of advanced edge-detection methods of potential field data in the tectono-structural study of the southwestern part of Cameroon

et al. 2022

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The southwest part of Cameroon is composed of a range of geological structures and sedimentary basins, whose geological history dates from the Cretaceous, and their establishment would have originated from the opening of the South Atlantic. Among these structures, the most important is the Cameroon Volcanic Line, generally denoted CVL, followed by the southern part of the Central African Shear Zone (CASZ) called the Foumban Shear Zone (FSZ), the Ntem Complex, the Benue Trough, the northern margin of the Congo Craton, and many others. The major structures identified in this part are formed as a result of geodynamic activity between the Oligocene and the recent period, to which we can add the volcanism that exists along with the continental limit. The XGM201e_2159 model is used to highlight the geological structures of Southwestern Cameroon. First, we separated the regional and residual anomalies from Bouguer gravity data. Then, we used a combination of filters to enhance the signature of the residual anomalies in Southwest Cameroon. These filters identified various geological structures in the area. Finally, we applied the enhanced horizontal gradient amplitude (EHGA) and multi-scale horizontal derivative of the vertical derivative (MSHDVD) methods to reveal the geological contacts, allowing us to establish the corresponding structural map of the region. In addition, the results obtained in this study are the first to precisely define the circumferential demarcation of the continental and oceanic expansions of Mount Cameroon, while clearly illustrating the Bao, Bomana, Tiko, and Ekona faults that extend to the Bakassi Peninsula and the Douala outlet. Furthermore, they highlight the strike–slip faults in the summit vicinity. The structural map shows that most of the geological boundaries identified in the area are trending in the NE–SW, NNE–SSW, ENE–WSW, N–S, and NW–SE directions.

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“…Many methods have been introduced to outline the structures from the gravity anomaly (Eldosouky et al, 2022a). These edge enhancement methods evolve with the use of the derivatives of gravity data (Ekinci et al, 2013;Kafadar, 2017;Ghomsi et al, 2022c).…”

Section: Introductionmentioning

confidence: 99%

Analysis of gravity data for extracting structural features of the northern region of the Central Indian Ridge

Pham

Prasad

2023

Vietnam J. Earth Sci.

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In this study, structural lineaments and fracture zones of the northern region of the Central Indian Ridge have been determined using gravity data from XGM2019e_2159 global gravity model. In this scope, firstly, the edge detection performances of the gradient amplitude of the tilt angle (THDR), theta map (TM), improved local phase (ILP), and improved logistic (IL) methods have been evaluated on synthetic examples. The results show that the IL method effectively avoids false edges and produces high-resolution edges. Then, the methods are applied to the gravity anomaly of the northern region of the Central Indian Ridge. It has been determined that the most prominent structural lineaments observed over the region are in the NE-SW and NW-SE directions. These trends match reasonably with the significant trends of the Tilt depth solutions that show a depth range of 2.2 km to 7 km for different geological structures. In addition, the obtained results are compatible with the known fracture zones of the study area. The findings help us to improve our understanding of the structure and tectonic framework of the study region.

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Structural interpretation of potential field data using the enhancement techniques: a case study

Cited by 39 publications

References 109 publications

Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

Contribution of advanced edge-detection methods of potential field data in the tectono-structural study of the southwestern part of Cameroon

Analysis of gravity data for extracting structural features of the northern region of the Central Indian Ridge

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