Subsurface structural features of the basement complex and mineralization zone investigation in the Barramiya area, Eastern Desert of Egypt, using magnetic and gravity data analysis

Saleh, A.; Abdelmoneim, Mohamed; Abdelrady, Mohamed; Deep, Mohamed Al

doi:10.1007/s12517-018-3983-7

Cited by 13 publications

(8 citation statements)

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“…In terms of geophysical techniques, aeromagnetic techniques, for example, are appropriate and effective in examining mineralized, alteration, and prospective zones [33][34][35][36][37][38]. However, there are just a few publications that have been published that look at the relationship between magnetic intensity and gold mineralization zones (e.g., [16,39,40]. We used magnetic data and various techniques to determine the structural trends and/or shear zones that control and identify mineralization zones in this study.…”

Section: Resultsmentioning

confidence: 99%

“…The research region is heavily deformed and sheared, with gold, sulphides, and chromite deposits. Shear zones and general faults regulate gold deposition in the area, which is controlled by auriferous quartz veins [16,17]. In the northern part of the El-Barramiya area, syn-orogenic quartz diorite and granodiorite intrusions subsequently intruded the ophiolitic mélange phase.…”

Section: Geologic Settingmentioning

confidence: 99%

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Detection of Mineralization Zones Using Aeromagnetic Data

et al. 2022

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Every day, mining corporations grow and develop over Egypt’s Eastern Desert in search of gold, silver, and other metals. Mineral resources in Egypt are a powerful tool for increasing national income. In this study, we are interested in mineral exploration, such as gold and porphyry deposits, using aeromagnetic data, applying various processing techniques such as First Vertical Derivative, Total Horizontal Gradient, Analytical Signal, Tilt Derivative, and the center of exploration targeting. The study area is located at the Central Eastern Desert, which includes the Barramiya, Abu Marwa, and Abu Mireiwah regions. The analysis of the delineated structural trends shows that the N–S, NW–SE, and NE–SW are the most effective directions for managing deposits in the investigated area. A minor trend is also shown in the E–W direction and corresponds to the alteration zones reported by geology and prior investigations. Mineralization zones occur most frequently at the contact between ophiolitic serpentinite, sediments, and other rock types. This study intends to add more about the use of the recently developed technology of CET grid analysis for mineral exploration and structural interpretation across the Central Eastern Desert. The CET porphyry analysis map shows locations where several occurrences of porphyry deposits are probable. The newly discovered spots are similar to the area’s usual deposit sites. This study proves that aeromagnetic data are significant in mineral exploration since they are useful for the discovery of the structure and shear zones controlling the mineralization zones.

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Section: Resultsmentioning

confidence: 99%

Section: Geologic Settingmentioning

confidence: 99%

Detection of Mineralization Zones Using Aeromagnetic Data

et al. 2022

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“…According to the existing magnetic classification scheme for rocks [43,44], the rocks in the study area can be classified into five types: extremely strongly magnetic, strongly magnetic, medium magnetic, weakly magnetic, and non-magnetic, depending on their magnetic susceptibility values. According to magnetic susceptibility data from core and outcrop samples, core sample test results show that the granite and gneiss exhibit medium magnetic, weakly magnetic, and non-magnetic characteristics, while outcrop sample test results show that the granite also has strongly magnetic and extremely strongly magnetic characteristics (see Figure 6).…”

Section: Magnetic Properties Of Rocksmentioning

confidence: 99%

Integrated Identification of Lithology Using Seismic and Magnetic Anomaly Data for Granite and Gneiss Basement: A Case Study of the LiShui Depression in the East China Sea Basin

Zhang

Tang

et al. 2023

Minerals

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Granite and gneiss buried hill reservoirs are controlled by their lithology and dark mineral content. Therefore, lithological identification and dark mineral content analysis are important research tools in the early stage of buried hill exploration. In this paper, the relationships between the seismic facies and lithology, magnetic susceptibility, and magnetic anomalies of granite and gneiss are analyzed based on the lithological characteristics of the LiShui depression (LS depression) in the East China Sea Basin (ECSB). The waveform classification method is used to identify granite and gneiss, and the waveform classification results reveal that areas with continuous distribution of a single seismic trace model or two seismic trace models represent good continuity, and can be interpreted as gneiss. Areas with a mixed distribution of multiple seismic trace models represent chaotic and poor continuity, which can be interpreted as granite. The mixed linear zone with multi-seismic trace models is a fault zone, and the rock is cataclasite. In addition, reduction to the pole (RTP) and downward continuation technique for magnetic data processing were used to determine the dark mineral content. Overall, the granite and gneiss can be divided into three types based on magnetic anomaly data: high, moderate, and low magnetic anomaly areas. The areas in which granite with moderate and low magnetic anomalies is distributed are the favorable exploration target areas. The above method provides a technical means of lithological identification in the early stage of buried hill exploration.

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“…The El-Barramiya area has been studied by many researchers in order to identify subsurface structures, such as faults, shear zones, and lithological contacts, which may affect ore deposit mineralization and allow effective prospecting via a range of geological and geophysical techniques (Mahmoud et al, 2013;Saleh et al, 2018;Mohamed et al, 2022;Abdelrady et al, 2023). Here, we present the results of eld work, petrography, uid inclusion analysis, and geochemical analyses of mineralized rocks (listvenites, and gold-bearing quartz and carbonate veins) in the El-Barramiya area.…”

Section: Introductionmentioning

confidence: 99%

Orogenic lode-gold deposits and listvenization processes in the El-Barramiya area, Eastern Desert, Egypt

Abdelrady

Elhadek

Abdelmoneim

et al. 2023

Preprint

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Gold mineralization in the El-Barramiya region of the Eastern Desert, Egypt, is connected to the post-accretionary stage throughout the Central Eastern Desert. It is represented by quartz, quartz-carbonate veins and disseminations in listvenite rocks. The thrust contact between rock units in El-Barramiya area played an imperative part in gold mineralization where the obduction of ophiolitic rocks over the metasediments and metavolcanics caused shear zones. Mineralization in the study area formed along shear zones and the gold mineralization prefers to precipitate along the transition zone between low-grade regional metamorphic area which is represented by metasediments and high grade which is represented by actinolite schist. Gold mineralization lode of El-Barramiya gold mine area is situated in E-W trending quartz and quartz-carbonate veins along a shear zone located in the intersections between faults trend in NE-SW (Najd fault), NW-SE and thrust faults trend in NEE-SWW in metavolcanic and metasedimentary host rocks. Porphyry granite in the mine area played an important role in hydrothermal alteration process where it represents the source of K, listvenite formed when fluids rich in CO2 and bearing-K permeate and alter the previously altered ultramafic rocks, usually serpentinites of the ophiolitic mélange rocks. Listvenitization process includes silicification and carbonatization metasomatic processes, tectonized serpentinites are altered to listvenite as the carbonatization becomes more intense close to dipping transpressive faults. Geochemical studies of listvenite and mineralized veins helped to determine the ultramafic genesis of listvenite and gold transformed as gold bisulfide. Petrographic investigation and geochemical studies show different types of alterations (carbonatization and silicification) and mineralization. Mineralizations are represented by gold and sulfides (pyrite, arsenopyrite and smaller quantities of chalcopyrite, sphalerite, galena, tetrahedrite and gersdorffite) found in auriferous quartz veins and disseminated in listvenite. The area exposed to brittle - ductile deformation in addition to different types of structures such as faults and fractures controlling on the formation of mineralization and act as hydrothermal channels ways for fluid flow. Fluid inclusions studies revealed that gold mineralization was formed from heterogeneous trapping of H2O–CO2 fluids at a temperature of 280–340°C and pressure within the range 1.5–1.9 kbar, which is consistent with the mesothermal conditions.

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Subsurface structural features of the basement complex and mineralization zone investigation in the Barramiya area, Eastern Desert of Egypt, using magnetic and gravity data analysis

Cited by 13 publications

References 23 publications

Detection of Mineralization Zones Using Aeromagnetic Data

Detection of Mineralization Zones Using Aeromagnetic Data

Integrated Identification of Lithology Using Seismic and Magnetic Anomaly Data for Granite and Gneiss Basement: A Case Study of the LiShui Depression in the East China Sea Basin

Orogenic lode-gold deposits and listvenization processes in the El-Barramiya area, Eastern Desert, Egypt

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