Integration of remote sensing and geophysical data for the extraction of hydrothermal alteration zones and lineaments; Gabal Shilman basement area, Southeastern Desert, Egypt

Mahdi, Ali; Eldosouky, Ahmed M.; Khateeb, Sayed O. El; Youssef, Ahmed M.; Saad, Ahlam Ahmed

doi:10.1016/j.jafrearsci.2022.104640

Cited by 29 publications

(9 citation statements)

References 42 publications

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“…In recent years, spatial data has been often used in mineral exploration and mineralization prediction modeling (Eldosouky et al, 2021;Bencharef et al, 2022), and has achieved good results. Or combine remote sensing data with geophysical methods to extract alteration mineral information and apply it to mineral deposits (Eldosouky et al, 2020;Mahdi et al, 2022), and remote sensing data is becoming more and more important. In particular, WV-3 data with high spatial resolution can efficiently and accurately extract geological information.…”

Section: Discussionmentioning

confidence: 99%

“…Remote sensing data primarily used include TM, Landsat-8, and ASTER. Several studies worldwide have successfully extracted Al-OH-bearing, Mg-OH-bearing, and iron mineralization alterations from remote sensing data and created the relevant alteration information extraction process for these data (Herrmann et al, 2001;Yang, 2007;Zhang et al, 2007;Lv et al, 2009;Pour and Hashim, 2011;Yang et al, 2012;Huang, 2013;Masoumi et al, 2017;Eldosouky et al, 2020;Jonas et al, 2020;Bencharef et al, 2022;Mahdi et al, 2022). However, the medium-resolution multispectral data such as ASTER can easily map the large-scale alteration zone, but it is difficult to map the geological outcrop with small scale.…”

Section: Introductionmentioning

confidence: 99%

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Extracting hydrothermally altered information using WorldView-3 data: a case study of Huitongshan, NW Gansu, China

Chen,

Gao,

Xie

et al. 2023

Front. Earth Sci.

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Introduction: The Huitongshan skarn-type deposits, in which ore bodies primarily occur in the outer contact zone between K-feldspar granite and marble in the Beishan area, are evidently related to hydrothermal alteration of the surrounding rock. Key mineral alteration processes include serpentinization, epidotization, chloritization, carbonatization, jarosite, ferritization, and hematitization.Methods: WorldView-3 (WV-3), a satellite-recorded high-spatial resolution multispectral image, has been widely used in the exploration and prediction of different types of deposits around the world. In this study, WV-3 multispectral images were used to extract the spatial distribution data of the main altered minerals in the Huitongshan area. Dedicated radiometric calibration, atmospheric correction, and image fusion were used to pre-process the extracted spectral information related to hydrothermal alteration. In addition, directed principal component analysis (PCA) and a unique mineral index were designed based on the effective use of the WV-3 data band corresponding to the spectral absorption characteristics of altered minerals.Results: The findings of this study show that the PCA model and mineral index pro-posed herein are reliable both in theory and for practically obtaining extraction information. Additionally, the WV-3 data are well suited for identifying hydroxy-bearing alterations with rich short-wave infrared bands that distinguish Fe-OH–bearing alterations from Mg-OH–bearing alterations. The results obtained were applied to identify potential targets for skarn-type copper deposits and the implementation of prospecting practices.Discussion: This study provides a basis for the application of WV-3 data as an important and effective tool for alteration information extraction and determination of prospecting practice, thereby proving the validity of multispectral remote sensing images in mineral resource exploration.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extracting hydrothermally altered information using WorldView-3 data: a case study of Huitongshan, NW Gansu, China

Chen,

Gao,

Xie

et al. 2023

Front. Earth Sci.

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“…Aeromagnetic exploration is a powerful and fast, convenient and economical technique enabling the delineation of geological structures and exploration of mineral resources. It has been applied in the exploration of geotectonics, faults, igneous rocks, craters, magnetic-related polymetallic deposits, and extraction of hydrothermal alterations (Muundjua et al, 2007;Ortiz-Alemán and Urrutia-Fucugauchi, 2010;Gao et al, 2016;Elkhateeb and Abdellatif, 2018;Sridhar et al, 2018;Eldosouky et al, 2020;Shebl et al, 2021;Xiong, 2021;Bencharef et al, 2022;Ekpe et al, 2022;ElGalladi et al, 2022;Mahdi et al, 2022;Mamouch et al, 2023). Hereinto, two factors have to be taken into account before interpretation or inversion.…”

Section: Introductionmentioning

confidence: 99%

An aeromagnetic denoising-decomposition-3D inversion approach for mineral exploration

Xiu

Gao

et al. 2023

Front. Earth Sci.

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Reduction of aeromagnetic noise and extraction of mineralization-related residual anomalies are critical for aeromagnetic data processing in mineral exploration. This study introduced a multifractal singular value decomposition (MSVD) method to remove the noise and improved the bi-dimensional empirical mode decomposition (BEMD) algorithm to extract residual magnetic anomalies. It is shown that MSVD and improved BEMD could effectively reduce the noise and extract residual magnetic anomalies. Then, a wavenumber–domain iterative approach is applied in 3D imaging of magnetic anomalies and gradients with depth constraints, which is a rapid tool for qualitative and quantitative interpretation of magnetic data and is suitable for rapidly imaging large-scale data. The 3D inversion result is verified by four geological sections along the regional tectonic directions and some drilling holes on the deposits. It is revealed that this proposed approach is practical and effective in dealing with aeromagnetic data interpretation and inversion for mineral exploration.

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“…Moreover, the application of edge detection methods has witnessed a significant expansion in specific studies encompassing subsurface geological structure, mining exploration, geothermal investigations and hydrogeological studies (Melouah et al, 2021;Eldosouky et al, 2022a;Ekwok SE. et al, 2022;Mohamed et al, 2022b;El-Sehamy et al, 2022;Kharbish et al, 2022;Mahdi et al, 2022;Saada et al, 2022;Abdelrahman et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Application of enhanced methods of gravity data analysis for mapping the subsurface structure of the bahira basin in Morocco

et al. 2023

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Gravity-based imaging of the subsurface has increased worldwide recently. Improvements in the processing and analysis of gravity data have allowed us to locate the basement surface, map geologic basins, and define structural patterns. In this study, gravity data were analyzed to study the Bahira basin’s underlying geology. The Bahira basin is very important economically. The Ganntour plateau is distinctive due to the importance of the phosphate mining resources. Using gravity data, we mapped the subsurface and determined the underlying structural patterns that affect the study area. In this study, we used several techniques to edge detection including Total horizontal derivative (THDR), first vertical derivative (FVD), tilt derivative (TDR), and its horizontal derivative (THDR_TDR) methods. Accordingly, the geological history of the Bahira basin suggests that the main lineaments/faults trends are NE-SW, NW-SE, ENE-WSW, and WNW-ESE. The 3D Euler deconvolution showed the depth and location of lineaments/faults, and matched edge detection results. The eastern Bahira basin’s sedimentary layer is 2–8 km deeper according to the Euler technique. Two-dimensional forward modeling along three profiles in the Bahira basin revealed a horst-graben basement structure. The outcomes of this study improved the subsurface topographical variations of the Bahira Basin. The information collected so far can help future studies in the area.

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Integration of remote sensing and geophysical data for the extraction of hydrothermal alteration zones and lineaments; Gabal Shilman basement area, Southeastern Desert, Egypt

Cited by 29 publications

References 42 publications

Extracting hydrothermally altered information using WorldView-3 data: a case study of Huitongshan, NW Gansu, China

Extracting hydrothermally altered information using WorldView-3 data: a case study of Huitongshan, NW Gansu, China

An aeromagnetic denoising-decomposition-3D inversion approach for mineral exploration

Application of enhanced methods of gravity data analysis for mapping the subsurface structure of the bahira basin in Morocco

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