Integration of ASTER satellite imagery and 3D inversion of aeromagnetic data for deep mineral exploration

Eldosouky, Ahmed M.; El-Qassas, Reda A. Y.; Pour, Amin Beiranvand; Mohamed, Hassan; Sekandari, Milad

doi:10.1016/j.asr.2021.07.016

Cited by 59 publications

(20 citation statements)

References 56 publications

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“…Exploring the mineral deposits of the upper crust demands integrating various geologic, structural, geophysical, datasets, geochemical, and mineralogical studies 1 – 4 . Recognizing geological structures is vital for investigating mineral resources and regional surveys because they can provide optimum forms for magma emplacement and fluid migration.…”

Section: Introductionmentioning

confidence: 99%

“…Recognizing geological structures is vital for investigating mineral resources and regional surveys because they can provide optimum forms for magma emplacement and fluid migration. Furthermore, it can maximize mineralization investment in various geodynamics patterns 1 , 5 – 7 . However, surface surveying might not notice considerable geologic structures that significantly assemble the mineralized arrangements and earth’s resources 8 , 9 .…”

Section: Introductionmentioning

confidence: 99%

“…Magmatic titanomagnetite ore bodies typically exhibit complicated field evidence, they can be found as massive Fe–Ti oxides or as layers with their host rocks 10 . Therefore, aeromagnetic datasets provide the geometry of magnetized sources 1 , 2 that can be associated with mineralization. Edge/contact delineation of aeromagnetic data was recently used to accurately decipher geological structures 11 .…”

Section: Introductionmentioning

confidence: 99%

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Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt

Kharbish

Eldosouky²,

Amer³

2022

Sci Rep

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This study delineated the Fe–Ti oxide deposit concurrencies on the layered mafic intrusion in Gabal Akab El-Negum (GAN), South Eastern Desert, Egypt, using aeromagnetic mapping and chemical analysis of the hosted mafic rocks and mineralogical studies. Aeromagnetic data was improved using the enhanced horizontal gradient amplitudeto detect the primary structures (edges/contacts/faults) that control the distribution of Fe–Ti ore deposit. GAN layered gabbros are differentiated into troctolite, olivine–, pyroxene–, and hornblende–gabbros. These mafic rocks primarily comprise plagioclase, olivine, pyroxene, and hornblende with Fe–Ti ores (magnetite and ilmenite). The significant variation in Mg# of clinopyroxene between 0.70 and 0.82 indicates the importance of fractional crystallization in developing layered mafic intrusion. Clinopyroxene and plagioclase thermometry yielded low temperatures similar to the fractionated primary basaltic magma. The pairs of magnetite–ilmenite minerals in gabbros provide equilibrium temperatures of 539.44–815.56, and high fO2, reflecting various cooling and subsolidus reequilibration phases of minerals. The enrichment of GAN gabbros in light rare–earth elements relative to heavy rare–earth elements indicates the interaction between the Fe–Ti rich mantle and the fractionated tholeiitic magmas in the back-arc setting, generating Fe–Ti oxide ores.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt

Kharbish

Eldosouky²,

Amer³

2022

Sci Rep

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“…The object of this study which involves the assessment of sediment thicknesses, mapping of basin topography, and delineation of the spatial spread of magnetic sources were resolved using these magnetic datasets. These data can further be employed in the demarcation of regional surficial geologic boundaries [26], mineral assessment programs [11], mapping of hydrothermally modified rocks [27,[34][35][36][37], edges of sources [38], geothermal potentiality [39], and geologic structures such as faults, fractures, dykes, sills, etc. [27,40].…”

Section: Introductionmentioning

confidence: 99%

Depth Estimation of Sedimentary Sections and Basement Rocks in the Bornu Basin, Northeast Nigeria Using High-Resolution Airborne Magnetic Data

et al. 2022

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This study involves the use of high-resolution airborne magnetic data to evaluate the thicknesses of sedimentary series in the Bornu Basin, Northeast Nigeria, using three depth approximation techniques (source parameter imaging, standard Euler deconvolution, and 2D GM-SYS forward modelling methods). Three evenly spaced profiles were drawn in the N-S direction on the total magnetic intensity map perpendicular to the regional magnetic structures. These profiles were used to generate three 2-D models. The magnetic signatures were visually assessed to determine the thickness of depo-centres and the position of intrusions. The thicknesses of sedimentary series based on source parameter imaging results are approximately ranged 286 to 615 m, 695 to 1038 m, and 1145 to 5885 m for thin, intermediate, and thick sedimentation, respectively. Similarly, the standard Euler deconvolution result shows thin (130 to 917 m), intermediate (1044 to 1572 m), and thick (1725 to 5974 m) sedimentation. The magnetic model of Profile 1, characterized by two major breaks, shows that the igneous intrusions and basement rocks are covered by sediments with thickness varying from 300 to <3500 m, while Profile 2 has a maximum estimated depth value of about 5000 m at the southern part. Furthermore, the Profile 3 model shows sediment thicknesses of 2500 and 4500 m in the northern and southern flanks of the profile, respectively. The maximum sediment thickness value from the various depth estimation methods used in this study correlate relatively well with each other. Furthermore, the anomalous depth zone revealed by the 2D forward models coincides with the locality of the thick sedimentation revealed by the source parameter imaging and standard Euler-deconvolution (St-ED) methods. The maximum depth values obtained from the various depth estimation methods used in this study correlated strongly with each other. The widespread occurrence of short-wavelength anomalies in the southern part of the study area as indicated by the jagged nature of the magnetic signature was validated by the analytic signal and upward-continuation results. Generally, it was observed that the southern part of the research area is characterized by thick sedimentation and igneous intrusions.

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“…Gravity and magnetic data can provide vital information on the subsurface structures (Dung and Minh, 2017;Hang et al, 2019;Eldosouky et al, 2021a;Eldosouky et al, 2021b;Oksum 2021). The determination of geological boundaries from the interpretation of gravity data has been the subject of several studies, and many different techniques have been introduced (Melouah et al, 2021;Eldosouky et al, 2022a;Pham et al, 2022a;Eldosouky et al, 2022b;Pham et al, 2022b;Eldosouky et al, 2022c;Ghomsi et al, 2022c;Eldosouky et al, 2022d;Ghomsi et al, 2022d), such as, for example, the peak detection methods (Blakely and Simpson, 1986;Hang et al, 2017;Pham et al, 2018;Pham et al, 2021), vertical derivatives, the filters of horizontal gradient (Cordell, 1979;Cordell and Grauch, 1985), the analytical signal (Nabighian, 1972;Nabighian, 1984;Roest et al, 1992), tilt angle (Miller and Singh, 1994), the horizontal gradient amplitude of tilt angle (Verduzco et al, 2004), enhanced horizontal gradient amplitude (Pham et al, 2020a), improved logistic function (Pham et al, 2020b), and balanced horizontal gradient amplitude filters (Prasad et al, 2022a;Prasad et al, 2022b).…”

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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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Integration of ASTER satellite imagery and 3D inversion of aeromagnetic data for deep mineral exploration

Cited by 59 publications

References 56 publications

Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt

Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt

Depth Estimation of Sedimentary Sections and Basement Rocks in the Bornu Basin, Northeast Nigeria Using High-Resolution Airborne Magnetic Data

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

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