This study developed a copper mineral prospectivity map for the Koldar Massif, Kazakhstan, using an integrated approach combining geophysical and satellite methods. A strong spatial-genetic link was identified between faults and hydrothermal mineralization, with faults acting as key conduits for ore-bearing fluids. Lineament analysis and density mapping confirmed the high permeability of the Koldar Massif, indicating its structural prospectivity. Hyperspectral and multispectral data (ASTER, PRISMA, WorldView-3) were applied for detailed mapping of hydrothermal alteration (phyllic, propylitic, argillic zones), which are critical for discovering porphyry copper deposits. In particular, WorldView-3 imagery facilitated the identification of new prospective zones. The transformation of magnetic and gravity data successfully delineated geological features and structural boundaries, confirming the fractured nature of the massif, a key structural factor for mineralization. The resulting map of prospective zones, created by normalizing and integrating four evidential layers (lineament density, PRISMA-derived hydrothermal alteration, magnetic, and gravity anomalies), is highly validated, successfully outlining the known Aktogay, Aidarly, and Kyzylkiya deposits. Furthermore, new, previously underestimated prospective areas were identified. This work fills a significant knowledge gap concerning the Koldar Massif, which had not been extensively studied using satellite methods previously. The key advantage of this research lies in its comprehensive approach and the successful application of high-quality multispectral imagery for mapping new prospective zones, offering a cost-effective and efficient alternative to traditional ground-based investigations.

This study developed a copper mineral prospectivity map for the Koldar massif, Kazakhstan, using an integrated approach combining geophysical and satellite methods. A strong spatialgenetic link was identified between faults and hydrothermal mineralization, with faults acting as key conduits for ore-bearing fluids. Lineament analysis and density mapping confirmed the high permeability of the Koldar massif, indicating its structural prospectivity. Hyperspectral and multispectral data (ASTER, PRISMA, WorldView-3) were applied for detailed mapping of hydrothermal alteration (phyllic, propylitic, argillic zones), which are critical for discovering porphyry copper deposits. In particular, WorldView-3 imagery facilitated the identification of new prospective zones. The transformation of magnetic and gravity data successfully delineated geological features and structural boundaries, confirming the fractured nature of the massif, a key structural factor for mineralization. The resulting map of prospective zones, created by normalizing and integrating four evidential layers (lineament density, PRISMA-derived hydrothermal alteration, magnetic, and gravity anomalies), is thoroughly validated, successfully outlining the known Aktogay, Aidarly, and Kyzylkiya deposits. Furthermore, new, previously underestimated prospective areas were identified. This work fills a significant knowledge gap concerning the Koldar massif, which had not been extensively studied using satellite methods previously. The key advantage of this research lies in its comprehensive approach and the successful application of high-quality hyperspectral imagery for mapping new prospective zones, offering a cost-effective and efficient alternative to traditional ground-based investigations.

Permeability is a key transport property of porous materials, and its accurate evaluation is relevant when studying applied tasks, such as CO₂ injection into reservoirs and investigating groundwater quality. This study examines the dependence of permeability on total and connected porosity, hydraulic tortuosity, specific surface area, and mean pore radius based on the data of 408 cubic sub-volumes extracted from heterogeneous and naturally fractured cylindrical carbonate samples, before and after injection of HCl solutions. These parameters were computed using pore-scale modeling of fluid flow. Our results show that permeability correlates well with porosity and mean pore radius, with correlation coefficients of $R^2\approx 0.65-0.79$ for heterogeneous samples. It was found that the presence of natural fractures significantly influenced the relationship between permeability and other parameters. The relationship between permeability $k$, tortuosity $\tau$, and specific surface area $S$ is described by the power laws $k~{\tau }^{-\alpha }$ and $k~S^{-\beta }$, with coefficients $\alpha$ and $\beta$ substantially exceeding those in the Kozeny–Carman equation. It was also found that there is a parabolic relationship between connected and total porosities, both before and after rock dissolution with $R^2\approx 0.96-0.99$. This allowed for an estimation of percolation threshold porosity in accordance with the literature data.

В данной работе проведен линеаментный анализ территории Карагандинского угольного бассейна для оценки региональной тектонической активности. Исследуемый район является одним из крупнейших и старейших в мире месторождений каменного угля. Интенсивная подземная и открытая добыча угля приводят к возникновению и активизации деформационных процессов на земной поверхности. В связи с чем возникает необходимость проведения актуальной оценки региональной тектонической активности. Для достижения заданной цели была построена высокоточная цифровая модель рельефа с использованием пары спутниковых радарных снимков, которая была применена в качестве исходного материала для проведения линеаментного анализа, выполненного в программном обеспечении PCI Geomatica с помощью алгоритма LINE.Для каждого набора данных линеаментов была создана роза-диаграмма частоты и длин выявленных линий в программе RockWork. Анализ роз-диаграмм частоты и длин линеаментов показал преимущественную С-Ю направленность. Согласно карте сейсмического районирования, построенной по данным каталога зарегистрированных землетрясений, исследуемый регион отнесен к асейсмичной зоне. Однако, анализ дополнительных данных свидетельствуют о несоответствии действительности и необходимости пересмотра существующей карты сейсмического районирования. В связи с этим, выполнение непрерывного геомониторинга является неотъемлемой частью полноценного контроля развития горного предприятия.

Permeability is an important transport property of porous materials, and its accurate evaluation is relevant in studying applied tasks such as CO2 injection into reservoirs and investigating groundwater quality issues. This study examines the dependence of permeability on total and connected porosity, hydraulic tortuosity, specific surface area, and mean pore radius based on the data of 408 cubic sub-volumes extracted from heterogeneous and naturally fractured cylindrical carbonate samples before and after injection of HCl solutions into them. These parameters were computed using pore-scale modeling of fluid flow. It has been shown that permeability correlates well with porosity and mean pore radius with correlation coefficients of R2≈0.65-0.79 for heterogeneous samples. It was found that the presence of natural fractures significantly influenced the relationship between permeability and other parameters. The relationship between permeability k, tortuosity τ, and specific surface area S is described by power laws k~τ-α and k~S-β, with coefficients α and β substantially exceeding those in the Kozeny-Carman equation. It was also found that there is a parabolic relationship between connected and total porosities both before and after rock dissolution with R2≈0.96-0.99. This allowed for estimation of percolation threshold porosity that are in good agreement with the literature data.