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Lithology Identification of Lithium Minerals Based on TL-FMix-MobileViT Model 基于TL-FMix-MobileViT模型的锂矿物岩性识别
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-03-11 DOI: 10.1007/s11053-025-10475-0
Jianpeng Jing, Nannan Zhang, Hao Zhang, Shibin Liao, Li Chen, Jinyu Chang, Jintao Tao, Siyuan Li
{"title":"Lithology Identification of Lithium Minerals Based on TL-FMix-MobileViT Model","authors":"Jianpeng Jing, Nannan Zhang, Hao Zhang, Shibin Liao, Li Chen, Jinyu Chang, Jintao Tao, Siyuan Li","doi":"10.1007/s11053-025-10475-0","DOIUrl":"https://doi.org/10.1007/s11053-025-10475-0","url":null,"abstract":"<p>In lithium mineral exploration, rapid and accurate identification of lithium-related rock lithologies is critical. Traditional manual methods are time-consuming and have limited accuracy, whereas some deep learning models, despite offering high precision, suffer from high computational complexity and low inference speeds, limiting their practical application. To address these issues, this study proposes a lightweight deep learning method based on a transfer learning-based Fourier-space mixed sample data augmentation mobile vision transformer (TL-FMix-MobileViT) to efficiently identify six types of lithium-related rock lithologies. Data from Dahongliutan (Xinjiang, China), Portugal, and Spain were used for model training. The model integrates the inverted residual blocks of MobileNetV2, reducing computational cost and accelerating inference with depth-wise separable convolutions, along with a lightweight vision transformer that extracts both local and global features while lowering complexity. Transfer learning with pretrained models reduces the training time and resource usage, while the FMix data augmentation method improves the generalization ability and accelerates convergence. Among three TL-FMix-MobileViT variants (extra-extra small, extra small, and small), the small version performed best, with strong stability and generalization ability, although all variants offer benefits for different scenarios. Compared with seven classic models, TL-FMix-MobileViT achieved the highest classification performance, with over 99% accuracy and reliable inference. Visual comparisons showed that the model effectively captured features at rock boundaries, thereby providing superior classification of mixed rock features compared with other models. This lightweight model provides an efficient and accurate method for lithium-related rock lithology identification, demonstrating its potential for lithium exploration.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"158 9 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Integrated Geodata Science Workflow for Resource Estimation: A Case Study from the Merensky Reef, Bushveld Complex 资源估算的综合地球数据科学工作流程:以Bushveld杂岩Merensky Reef为例
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-03-10 DOI: 10.1007/s11053-025-10471-4
Glen T. Nwaila, Derek H. Rose, Hartwig E. Frimmel, Yousef Ghorbani
{"title":"An Integrated Geodata Science Workflow for Resource Estimation: A Case Study from the Merensky Reef, Bushveld Complex","authors":"Glen T. Nwaila, Derek H. Rose, Hartwig E. Frimmel, Yousef Ghorbani","doi":"10.1007/s11053-025-10471-4","DOIUrl":"https://doi.org/10.1007/s11053-025-10471-4","url":null,"abstract":"<p>Integrated workflows for mineral resource estimation from exploration to mining must be able to process typical geodata (e.g., borehole data), perform data engineering (e.g., geodomaining), and spatial modeling (e.g., block modeling). Several methods exist, however they can only handle individual subtasks, and are either semi or fully automatable. Thus, an integrated workflow has not been established, which is needed to handle bigger geodata sets, perform remote monitoring, or provide short-term operational feedback. Bigger (more voluminous, higher velocity and higher dimensional) geodata sets are both emerging and anticipated in future exploration and mining operations, necessitating a geodata science counterpart to traditional, segregated, and routinely manual geostatistical workflows for resource estimation. In this paper, we demonstrate a prototype that integrates various data processing, pointwise geodomaining, domain boundary delineation, combinatorics-based visualization, and geostatistical modeling methods to create a modern resource estimation workflow. For the purpose of geodomaining, we employed a fully semi-automated, machine learning-based workflow to perform spatially aware geodomaining. We demonstrate the effectiveness of the method using actual mining data. This workflow makes use of methods that are properly geodata science-based as opposed to merely data science-based (explicitly leverages the spatial aspects of data). The workflow achieves these benefits through the use of objective metrics and semi-automated modeling practices as part of geodata science (e.g., cross-validation), enabling high automation potential, practitioner-agnosticism, replicability, and objectivity. We also evaluate the integrated resource estimation workflow using a real dataset from the platiniferous Merensky Reef of the Bushveld Complex (South Africa) known for its high nugget effect.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"38 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of Lithium Mineralization Potential in the Jiulong Area, Western Sichuan (China), Using Spectral Residual Attention Convolutional Neural Network 基于频谱残差注意卷积神经网络的川西九龙地区锂矿化潜力预测
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-03-08 DOI: 10.1007/s11053-025-10473-2
Haiyang Luo, Na Guo, Chunhao Li, Hang Jiang
{"title":"Prediction of Lithium Mineralization Potential in the Jiulong Area, Western Sichuan (China), Using Spectral Residual Attention Convolutional Neural Network","authors":"Haiyang Luo, Na Guo, Chunhao Li, Hang Jiang","doi":"10.1007/s11053-025-10473-2","DOIUrl":"https://doi.org/10.1007/s11053-025-10473-2","url":null,"abstract":"<p>This study aimed to predict the lithium resource potential in the Jiulong region of western Sichuan using a spectral residual attention convolutional neural network (SRACN) model, which integrates hyperspectral imagery from the GF-5B satellite with spectral measurement data from field rock core samples. By incorporating residual connections and a spectral attention mechanism, the SRACN model efficiently extracts critical spectral features, thereby enhancing mineral identification accuracy and predictive performance. The experimental results demonstrated that: (1) The SRACN model achieved a classification accuracy of 96.46% and an F1 score of 0.9645 for muscovite classification and mineral mapping, indicating superior performance; (2) utilizing hierarchical density-based spatial clustering of applications with noise (HDBSCAN), lithium and rare metal mineralization zones in the Jiulong region were delineated, with results closely aligned with field validation, revealing significant exploration potential in the northern Daqianggou mining area and the Baitaizi region. This study presents a novel scientific and technical approach to regional geological prospecting and demonstrates the effectiveness of integrating SRACN with density clustering analysis for evaluating regional mineral resource potential.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"12 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143575255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of Groundwater Level and its Correlation with Land Subsidence and Groundwater Quality in Cangzhou, North China Plain, Using Time-Series Long Short-Term Memory Neural Network and Hybrid Models 基于时间序列长短期记忆神经网络和混合模型的沧州地下水位预测及其与地面沉降和地下水质量的相关性
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-03-07 DOI: 10.1007/s11053-025-10474-1
Mouigni Baraka Nafouanti, Junxia Li, Hamada Chakira, Edwin E. Nyakilla, Denice Cleophace Fabiani, Jane Ferah Gondwe, Ismaila Sallah
{"title":"Prediction of Groundwater Level and its Correlation with Land Subsidence and Groundwater Quality in Cangzhou, North China Plain, Using Time-Series Long Short-Term Memory Neural Network and Hybrid Models","authors":"Mouigni Baraka Nafouanti, Junxia Li, Hamada Chakira, Edwin E. Nyakilla, Denice Cleophace Fabiani, Jane Ferah Gondwe, Ismaila Sallah","doi":"10.1007/s11053-025-10474-1","DOIUrl":"https://doi.org/10.1007/s11053-025-10474-1","url":null,"abstract":"<p>Groundwater is the primary source of drinking water in the world, but its contamination and reduction cause environmental problems. Traditional hydraulic and numerical models for assessing groundwater and land subsidence are time-consuming and expensive. Thus, this study used the long short-term memory (LSTM) neural network to predict groundwater level and employed linear regression analysis and the hybrid random forest linear regression to find the correlation between groundwater and land subsidence. The impact of groundwater level on groundwater quality was investigated by forecasting the fluoride in groundwater using the hybrid models of random forest and k-nearest neighbor (RF–KNN), random forest linear model (HRFLM), and gradient boosting support vector regression (GBR–SVR) for the prediction of groundwater fluoride. The LSTM model yielded an <i>R</i><sup>2</sup> of 0.96 in forecasting groundwater level, and the time series results from 2018 to 2022 showed a variation in groundwater level, with a decline in 2022. The LSTM model suggested that from 2024 to 2040, the groundwater level would recover progressively. The regression analysis showed an <i>R</i><sup>2</sup> of 0.99 and a <i>p</i> value of 0.01 for the correlation between groundwater level and land subsidence, and the HRFLM model yielded an <i>R</i><sup>2</sup> of 0.94. For predicting groundwater fluoride contamination, the hybrid RF–KNN had the highest <i>R</i><sup>2</sup> of 0.97 compared to HRFLM and GBR–SVR, with <i>R</i><sup>2</sup> of 0.95 and 0.93, respectively. This research demonstrated that hybrid models and deep learning are advanced techniques that can be applied in Cangzhou to evaluate groundwater level and land subsidence and they can be applied in areas facing similar challenges.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"12 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143569781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tracing Deep-Seated Saturated Fractures in Depleted Shallow Aquifer Systems in a Granitic Terrain: An Integrated Hydro-geophysical Approach 花岗岩地形贫化浅含水层系统中深层饱和断裂的追踪:综合水文地球物理方法
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-03-03 DOI: 10.1007/s11053-025-10456-3
Sahebrao Sonkamble, Erugu Nagaiah, Enatula Appalanaidu, Joy Choudhury, Virendra M. Tiwari
{"title":"Tracing Deep-Seated Saturated Fractures in Depleted Shallow Aquifer Systems in a Granitic Terrain: An Integrated Hydro-geophysical Approach","authors":"Sahebrao Sonkamble, Erugu Nagaiah, Enatula Appalanaidu, Joy Choudhury, Virendra M. Tiwari","doi":"10.1007/s11053-025-10456-3","DOIUrl":"https://doi.org/10.1007/s11053-025-10456-3","url":null,"abstract":"<p>Groundwater is a vital renewable natural resource that largely supports the agriculture sector, especially in semi-arid climate of hard rock. However, the over-exploitation and inadequate recharge of groundwater in crystalline granitic terrains have depleted the shallow aquifer systems constraining the groundwater to be sporadically distributed in deep fractures. Therefore, tracing bedrock fractures becomes important, but the overlying thick pile of unsaturated saprolite layer presents a challenge to map them due to geophysical ambiguity. Currently, most studies have been done at laboratory scale, while bedrock fractures at natural field conditions are rarely attended as evidenced by numerous failures of borehole drillings in semi-arid hard rock terrain. To trace saturated bedrock fractures at natural field sites, we performed a multi-disciplinary experiment comprising hydro-geological insights, social information, remote sensing, gradient resistivity profile (GRP), vertical electrical sounding (VES) and electrical resistivity tomography (ERT) followed by exploratory borehole drillings, and hydro-chemical source speciation in a semi-arid, crystalline granitic terrain in southern India. The results showed (1) GRP as a precursor records the signatures of saturated bedrock fractures qualitatively, (2) least square inversion models of ERT demarcate distinct litho-units and saturated bedrock fractures, (3) exploratory borehole drilling shows saturated bedrock fractures at 49–54 m and 63–67 m depth designated with high yield (<i>Q</i> = 3382 lph), which compare well with electrical imaging results, and (4) hydro-chemical source speciation with dominated alkali-feldspar (albite) weathering confirmed groundwater from bedrock fractures, which supplemented the geophysical anomalies. These observations led to a practical step-by-step field guide for tracing deep-seated bedrock fractures in geologically similar semi-arid regions.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"84 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing Mining Exploration through Geostatistical Analysis of Seismic Tomographies at Different Scales: Improving Low-Resolution Data by High-Resolution Results 不同尺度地震层析层地质统计分析加强矿山勘探:以高分辨率结果改善低分辨率数据
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-02-28 DOI: 10.1007/s11053-025-10472-3
José Joaquín González, Nadia Mery, Felipe Navarro, Gonzalo Díaz, Diana Comte, Sergio Pichott
{"title":"Enhancing Mining Exploration through Geostatistical Analysis of Seismic Tomographies at Different Scales: Improving Low-Resolution Data by High-Resolution Results","authors":"José Joaquín González, Nadia Mery, Felipe Navarro, Gonzalo Díaz, Diana Comte, Sergio Pichott","doi":"10.1007/s11053-025-10472-3","DOIUrl":"https://doi.org/10.1007/s11053-025-10472-3","url":null,"abstract":"<p>In the context of mining exploration, local earthquake tomography serves as a valuable complementary tool, applicable across varying scales from greenfield to brownfield projects. Nevertheless, interpreting body-wave velocity anomalies within tomographies poses a significant challenge, which largely depends on the expertise of the analyst and the availability of information. Addressing this challenge, this paper proposes a geostatistical analysis to effectively compare and enhance the information extracted from tomographies ranging from lower to higher resolutions. The data utilized in this study correspond to the tomographic inversion values of Mantos Rojos (MR) and Radomiro Tomic (RT) porphyry copper deposits situated within the Chuquicamata District in northern Chile. MR has a resolution of 2 × 2 km<sup>2</sup>, comparatively lower than RT’s resolution of 1 × 1 km<sup>2</sup>, yet both share the same spatial zone. This study evaluated the discernment capabilities of lower-resolution tomography (MR) in comparison to its higher-resolution counterpart (RT) using turning bands simulation. The simulated Vp/Vs values of MR were compared against RT seismic tomography data. Visual validation revealed that simulated Vp/Vs values from P- and S-wave velocity values of MR can identify the low Vp/Vs anomalies (&lt; 1.7). Moreover, spatial analysis compared the experimental variograms for MR realizations and for RT values in preferential directions for Vp/Vs ratios, finding a correspondence between both spatial tools. Finally, geological validation was carried out by comparing the simulation results with geological maps of the study area and copper grades obtained through drilling campaigns provided by CODELCO, where spatial patterns indicative of mineralization and larger-scale geological features like the West Fault were identified. Our research has practical implications because, through geostatistical simulations, the grid dimensions of seismic tomography of MR can be reduced and still identify low Vp/Vs anomalies within the area of study, being consistent with the lower-resolution validation grid of RT. Our findings demonstrate the efficacy of geostatistical methods in enhancing exploration decision-making by providing insights into subsurface geological features and their relationship to mineralization. This approach not only improves the efficiency and success rate of mineral exploration projects but also minimizes environmental impact by allowing for more targeted and informed exploration activities.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"33 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-Temperature Oxidation Characteristics and Spontaneous Combustion Limit Parameters of Residual Coal in Deep Mine Goafs 深部采空区残余煤低温氧化特性及自燃极限参数
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-02-22 DOI: 10.1007/s11053-024-10436-z
Yun-chuan Bu, Hui-yong Niu, Hai-yan Wang, Yan-Xiao Yang, Lu-lu Sun
{"title":"Low-Temperature Oxidation Characteristics and Spontaneous Combustion Limit Parameters of Residual Coal in Deep Mine Goafs","authors":"Yun-chuan Bu, Hui-yong Niu, Hai-yan Wang, Yan-Xiao Yang, Lu-lu Sun","doi":"10.1007/s11053-024-10436-z","DOIUrl":"https://doi.org/10.1007/s11053-024-10436-z","url":null,"abstract":"<p>As mining depth increases, the temperature of coal seams increases gradually, which increases the risk of spontaneous coal combustion in goaf areas. This paper uses a programmed temperature rise experiment to analyze the oxidation combustion characteristics of high ground temperature coal and calculates the oxidation kinetic parameters and limit characteristic parameters. The results show that, above 100 °C, the ratios C<sub>3</sub>H<sub>8</sub>/C<sub>2</sub>H<sub>6</sub> and C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> change with the same trend. The CO and CO<sub>2</sub> release rates, oxygen consumption rate, heating rate and heat release intensity are positively correlated with the ground temperature. There is a good exponential relationship between the release rate of CO and CO<sub>2</sub> and the coal temperature. The activation energy increases and then decreases as the oxidation temperature increases (above 100 °C). In the later stage of low-temperature oxidation, the higher the ground temperature is, the lower the activation energy, the more active the organic active groups and the more violent the oxidation reaction. As the oxidation temperature increases, the lower-limit oxygen concentration (<i>C</i><sub>min</sub>) and the minimum floating coal thickness (<i>h</i><sub>min</sub>) increase and then decrease, and the high ground temperature reduces the temperature at which the maximum is reached. With increasing ground temperature, <i>h</i><sub>min</sub> and <i>C</i><sub>min</sub> increase, and the maximum air leakage intensity decreases. The research results provide a theoretical basis for the prevention and control of spontaneous coal combustion in high ground temperature coal seam mining in deep mines.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"1 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiscale Pore–Fracture Structure Characteristics of Deep Coal Reservoirs in the Eastern Margin of the Ordos Basin, China 鄂尔多斯盆地东缘深层煤储层多尺度孔缝结构特征
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-02-16 DOI: 10.1007/s11053-025-10463-4
Guangbiao Tao, Zhenzhi Wang, Yi Jin, Haichao Wang, Daping Xia, Jienan Pan
{"title":"Multiscale Pore–Fracture Structure Characteristics of Deep Coal Reservoirs in the Eastern Margin of the Ordos Basin, China","authors":"Guangbiao Tao, Zhenzhi Wang, Yi Jin, Haichao Wang, Daping Xia, Jienan Pan","doi":"10.1007/s11053-025-10463-4","DOIUrl":"https://doi.org/10.1007/s11053-025-10463-4","url":null,"abstract":"<p>The pore–fracture structure of deep coal deposits is highly important for the potential evaluation, investigation, and utilization of deep coalbed methane resources. This study used methods such as low-pressure CO<sub>2</sub> adsorption, low-temperature N<sub>2</sub> adsorption, high-pressure mercury intrusion porosimetry, scanning electron microscopy, and optical microscopy to describe the pore–fracture structure of deep coal reservoirs at multiple scales and to discuss the development features, complexity, and influence on permeability of the pore–fracture structure of coal reservoirs. The results showed that there were significant differences in the pore volume and specific surface area (<i>SSA</i>) of the coal specimens with respect to the distribution of pore diameters. The micropore volume and <i>SSA</i> accounted for the largest proportions (85.93% and 98.63%, respectively). The more moisture and fixed carbon content there were in coal, the larger the micropore volume was. The higher the yields of ash and volatile matter were, the smaller the micropore volume was. The larger the pore radius in coal was, the greater the fractal dimension was. Besides, within their respective pore size sections, as the fractal dimension increased, the pore volume gradually decreased. As the vitrinite content increased, the fracture aperture and surface density gradually increased. As the fracture aperture increased, the fracture fractal dimension decreased, while the fracture tortuosity increased. Compared with shallow coal seams, the fracture aperture of deep coal seams showed a decreasing trend, while the pore volume showed an increasing trend.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"49 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing Gold Recovery from Witwatersrand-Type Ores Using Alkaline Glycine Leaching and Conditional Simulation 碱性甘氨酸浸出及条件模拟优化威特沃特斯兰德型矿石金回收率
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-02-16 DOI: 10.1007/s11053-025-10459-0
Glen T. Nwaila, Viwe Notole, Samira Alex, Yousef Ghorbani
{"title":"Optimizing Gold Recovery from Witwatersrand-Type Ores Using Alkaline Glycine Leaching and Conditional Simulation","authors":"Glen T. Nwaila, Viwe Notole, Samira Alex, Yousef Ghorbani","doi":"10.1007/s11053-025-10459-0","DOIUrl":"https://doi.org/10.1007/s11053-025-10459-0","url":null,"abstract":"<p>Witwatersrand-type gold deposits in South Africa are generally amenable to cyanidation due to their free-milling nature. However, the relatively easy-to-process gold ores have been mostly depleted, and the remaining ores are of low-grade combined with semi-refractory properties. Here, we use an integrated approach to understand the mineralogical and textural characteristics of the Witwatersrand-type gold ores and to explore the effectiveness of glycine-leaching gold recovery. Analysis of sulfide minerals using 3D micro-X-ray computed tomography data shows these minerals can be used as predictive indicators for feed gold grade as they either co-exist and/or encapsulate gold. Primary experimental results demonstrate that alkaline glycine can recover &gt; 80% Au in 100 hours at ambient temperatures. Glycine thus holds promise for gold recovery of low-grade free-milling and semi-refractory Witwatersrand-type gold ores. We also note that the presence of carbonaceous matter in ores, such as in the Black Reef orebody, adversely affects gold recovery. Ore blending may therefore be a suitable option to remediate poor gold recovery. Lastly, we demonstrate that stochastic simulations and data analytics can help augment primary experimental data to estimate uncertainty, providing a better understanding of experimental results, and thus providing future research directions.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"85 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lithologic Mapping in the Karamaili Ophiolite–Mélange Belt in Xinjiang, China, with Machine Learning and Integration of SDGSAT-1 TIS, Landsat-8 OLI and ASTER-GDEM 基于SDGSAT-1 TIS、Landsat-8 OLI和ASTER-GDEM的新疆克拉玛依蛇绿岩-姆萨兰格带岩性填图
IF 5.4 2区 地球科学
Natural Resources Research Pub Date : 2025-02-13 DOI: 10.1007/s11053-025-10467-0
Zhao Zhang, Fang Yin, Yunqiang Zhu, Lei Liu
{"title":"Lithologic Mapping in the Karamaili Ophiolite–Mélange Belt in Xinjiang, China, with Machine Learning and Integration of SDGSAT-1 TIS, Landsat-8 OLI and ASTER-GDEM","authors":"Zhao Zhang, Fang Yin, Yunqiang Zhu, Lei Liu","doi":"10.1007/s11053-025-10467-0","DOIUrl":"https://doi.org/10.1007/s11053-025-10467-0","url":null,"abstract":"<p>Lithological mapping is an effective tool for geological surveys and mineral exploration. However, it faces challenges in identifying complex rock types and improving classification accuracy. We mapped lithological units in the Karamaili ophiolite-mélange belt of Xinjiang using integrated machine learning algorithms, including artificial neural network (ANN), Mahalanobis distance (MD), support vector machine (SVM), and random forest (RF). These algorithms were utilized to process remote sensing datasets acquired by the Sustainable Development Science Satellite 1 Thermal Infrared Spectrometer (SDGSAT-1 TIS), Landsat-8 Operational Land Imager (OLI), and Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER-GDEM). The results indicated that the overall accuracies of ANN, MD, SVM, and RF were 68.87%, 78.98%, 93.4%, and 98.36%, respectively. The SVM and RF effectively mapped the lithological units. The SDGSAT-1 TIS data helped to identify mafic–ultramafic and feldspar-rich rocks, while Landsat-8 OLI helped to successfully delineate granitoid and complex lithologies. The ASTER-GDEM data helped improve mapping accuracy by providing detailed topographic information. Thus, this study confirmed the efficacy of the implemented approaches to delineate mineralization zones and to discriminate lithological units. This study provides detailed geological data for lithological mapping and serves as a significant reference for geological surveys and environmental monitoring.</p>","PeriodicalId":54284,"journal":{"name":"Natural Resources Research","volume":"67 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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