A new high resolution filter for source edge detection of potential field data

Pham, Luan Thanh; Eldosouky, Ahmed M.; Öksüm, Erdinç; Saada, Saada Ahmed

doi:10.1080/10106049.2020.1849414

Cited by 78 publications

(45 citation statements)

References 27 publications

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“…Thông thường, các phương pháp xác định biên được chia thành hai nhóm chính, gồm: nhóm phương pháp dựa trên biên độ đạo hàm và nhóm phương pháp dựa trên pha. Evjen (1936), Cordell và Grauch (1985), Roest và nnk (1992), Hsu và nnk (1996) [3,[16][17][18][19][20][21][22][23][24][25][26][27][28]. Ưu điểm của các phương pháp này là không yêu cầu biết trước các thông tin về nguồn gây dị thường.…”

Section: Mở đầUunclassified

Estimating Effectiveness of Some Methods for Detecting Edge of Potential Field Sources

Luan¹,

Sang²,

Minh³

et al. 2020

NST

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This paper presents a comparative study of effectiveness of edge detection methods such as total horizontal gradient, analytic signal amplitude, tilt angle, gradient amplitude of tilt angle, theta map, horizontal tilt angle, tilt angle of total horizontal gradient, tilt angle of analytic signal, improved theta map, and total horizontal gradient of improved tilt angle. The effectiveness of each method was estimated on synthetic magnetic data and synthetic gravity anomaly data with and without noise. The obtained results show that the tilt angle of gradient amplitude can detect all the edges more clearly and precisely. The applicability of each method is demonstrated on the aeromagnetic anomaly data from the Zhurihe region of Northeast China, and Bouguer gravity anomaly data from a region of North Vietnam. The results computed by the tilt angle of horizontal gradient were also in accord with the geologic structures of the areas.

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Section: Mở đầUunclassified

Estimating Effectiveness of Some Methods for Detecting Edge of Potential Field Sources

Luan¹,

Sang²,

Minh³

et al. 2020

NST

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“…These points are structured into a series of linear fragments known as edges. Several techniques have been developed to enhance the delineation of edges of source bodies using gravity and magnetic data [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Implementing Digital Edge Enhancers on Improved High-Resolution Aeromagnetic Signals for Structural-Depth Analysis around the Middle Benue Trough, Nigeria

2021

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Digital edge detector operations using magnetic derivatives in conjunction with spectra depth analysis were performed on high-resolution aeromagnetic signals to enhance the delineation and interpretation of depth, structural, and intrasedimentary features within the Middle Benue Trough (MBT) of North Central Nigeria, which could serve as a guide for mineral exploration. The derivatives revealed high-amplitude and short-wavelength anomalies over areas underlain by crystalline basement complexes, major volcanic zones, and aggregates of intrasedimentary volcanic and plutonic rocks. Geologic lineaments trending predominantly NE–SW and NW–SE, as well as minor trends of E–W and N–S, suggest that the area has undergone differential stress regimes across geologic time. The spectral depth analysis indicates a two-source depth model. The deep depth ranges from 1.9 to 6.1 km with an average of 3.9 km, whereas the shallow depth ranges between 0.3 and 1.9 km with an average of 0.8 km and is found to emanate from magnetic signals of post-Cretaceous near-surface igneous intrusions as well as other magnetized bodies embedded within the sediments. The spatial distribution of various hydrothermal minerals such as lead–zinc–barite deposits, as well as salt mineralization, is associated with the widespread Tertiary–recent magmatism and governed by pre-existing tectonic structures in the region.

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“…Analysis and interpretation of aeromagnetic data allowed mapping the subsurface extension of geologic structures * Corresponding authors at: Suez University E-mail addresses: dr_a.eldosoky@yahoo.com (A.M. Eldosouky) (Abuelnaga et al, 2019;Eldosouky, 2019;Sehsah et al, 2019;Sehsah and Eldosouky, 2020;Eldosouky et al, 2020a,b,c;Pham et al, 2020cPham et al, , 2021aEldosouky & Mohamed, 2021) and revealing porphyry intrusion (Gaafar, 2015;Holden et al, 2011;Wemegah et al, 2015;Eldosouky et al, 2020d). Aeromagnetic surveys play an essential role in searching for mineral deposits attributed to intrusions structures and shear zones.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Landsat-8 Imagery and Aeromagnetic Data for Deciphering Alteration Zones and Structures: Implications for Mineral Exploration in the Southeastern Desert of Egypt

Eldosouky

Pour

Hamed

et al. 2021

Frontiers in Scientific Research and Technology

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Remote-sensing (RS) and aeromagnetic data implemented notable information for mineralization potentiality detection of ore deposits within Al-Allaqi region of the southeastern Desert of Egypt. Several approaches of remote-sensing and aeromagnetic data were implemented. Results of band ratios (BR) and Principal Component Analysis (PCA) practicing Landsat-8 successfully imaged the hydrothermally altered zones and the structures outlined by lithologic contacts, faults, and porphyry features (dyke-like structures). Lineaments well extracted using aeromagnetic datasets. CET system method was applied for generating a heat map of the structural complexity. Likewise, the CET Porphyry Analysis system was performed to extract the likely near-circular porphyry features that revealing a probable site of mineralization and to validate the remote sensing observations. Integrated outcomes showed that areas of highly complex structures, density (fractures/faults) are consistent with the detected hydrothermally altered areas that are rivaled with mining zones in Al-Allaqi region of the Southeastern Desert of Egypt. This approach can be broadly appropriate to other divisions of the Southeastern Desert of Egypt for mineral prospecting.

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A new high resolution filter for source edge detection of potential field data

Cited by 78 publications

References 27 publications

Estimating Effectiveness of Some Methods for Detecting Edge of Potential Field Sources

Estimating Effectiveness of Some Methods for Detecting Edge of Potential Field Sources

Implementing Digital Edge Enhancers on Improved High-Resolution Aeromagnetic Signals for Structural-Depth Analysis around the Middle Benue Trough, Nigeria

Utilization of Landsat-8 Imagery and Aeromagnetic Data for Deciphering Alteration Zones and Structures: Implications for Mineral Exploration in the Southeastern Desert of Egypt

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