Ore and Energy Resource Geology最新文献

{"title":"Geochemical characteristics of stream sediments as a preliminary tool for exploration in the Mbengwi area, Northwestern Cameroon","authors":"Ralain Bryan Ngatcha ,&nbsp;Ngambu Aloysius Afahnwie ,&nbsp;Mary Ewokolo Molua Etutu ,&nbsp;Fuofu Hanson Fombalang ,&nbsp;Oliver Anoh Njoh","doi":"10.1016/j.oreoa.2025.100104","DOIUrl":"10.1016/j.oreoa.2025.100104","url":null,"abstract":"<div><div>The Mbengwi area is located along the Cenozoic volcano-plutonic Cameroon Volcanic Line (CVL) within the Northern Domain of the Pan-African Neoproterozoic Fold Belt of Cameroon. Important magnetite filings are continuously recovered in the area along drainage trails. The source of this concealed mineralization has not been established. A total of ten active stream sediment samples were recovered and analyzed for major and trace elements by the inductively coupled plasma mass spectrometry (ICP-MS) technique. The mineralogical population (phases) of the heavy mineral concentrates consists of zircon, rutile, quartz, and opaque mineral phases, with angular to sub-rounded morphologies indicating moderate to long transport distances. Sediment geochemistry shows high contents in Fe₂O₃ up to 37.43 wt.%, with low contents in Al₂O₃, MgO, CaO, Na₂O, and K₂O. The concentrations of siderophiles (e.g., Fe, Bi, Co, Cr, Ga, Mn, Mo, and Ni) and chalcophiles (e.g., In, Sn, and Hg) are slightly elevated with respect to their average upper continental crust values. The spatial distribution of iron and other elements is presented as point symbol maps, and the data is analyzed using multivariate statistics. From the principal component analysis (PCA), the Ag-Hg-Tl-Mo-As-Sb-Cd-Se-Pb-Au-In-Nb, as well as the Zn-Co-Ga-Mn-Ni-In-Fe-Cu factors, point to the presence of a hydrothermal fluid circulation in the area associated with possible Au-Ag-Mo and Fe-Cu mineralization. Ag, Hg, Mo, and As could serve as a pathfinder for Au in the area. The single element factor with Sn reflects the occurrence of cassiterite host rocks in the area. The sediments from the Mbengwi area were deposited under humid tropical and equatorial climates. The geochemical parameters (CIA, CIW, and PIA) point to a strong weathering of feldspar-bearing source rocks. The dominant mafic to intermediate igneous provenance suggests that mica schists, granodiorites, monzogranites, monzonites, and basanites could be potential source rocks in the area.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"19 ","pages":"Article 100104"},"PeriodicalIF":0.0,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing CO2 sequestration potential in Cenozoic basaltic rocks of Harrat Al-Shaam, Jordan","authors":"Ahmed Hammam ,&nbsp;Ahmed Nagy ,&nbsp;Israa S. Abu-Mahfouz ,&nbsp;Ahmed Al-Yaseri","doi":"10.1016/j.oreoa.2025.100105","DOIUrl":"10.1016/j.oreoa.2025.100105","url":null,"abstract":"<div><div>Carbon geo-sequestration is a promising approach to mitigate greenhouse gas emissions, particularly through the long-term storage of CO₂ in suitable geological formations. This study investigates the potential of the Harrat Al-Shaam Volcanic Field (HSVF) in Jordan as a host site for CO₂ mineralization, focusing on its textural, mineralogical, and geochemical characteristics. Basaltic rocks, known for their chemical composition rich in calcium (Ca), iron (Fe), and magnesium (Mg), demonstrate a favorable capacity for CO₂ sequestration. They undergo chemical reactions with injected CO₂ and brine, leading to the formation of stable carbonate minerals. In this work, we conducted a series of laboratory experiments involving the injection of supercritical CO₂ mixed with brine and freshwater into basalt core and powder samples to evaluate their mineralization potential under controlled conditions. Parameters such as mineral composition, alteration, and porosity were assessed. Microscopic investigations and geochemical analyses revealed changes in textural and mineralogical composition after CO₂ treatment. Notably, rapid neutralization of carbonic acid during injection was observed, resulting in the formation of calcite through water-rock reactions, which underscores the swift mineralization process inherent to these basaltic formations. The study confirms the moderate potential for carbonate mineralization and CO₂ storage capacity within the basaltic rocks of HSVF, attributed to their alkaline composition, enrichment of Ca and Fe-bearing minerals, and structural features such as fractures that enhance porosity and permeability. These findings highlight the effectiveness of mafic rocks as reliable candidates for geological CO₂ storage and indicate a need for further research to fully explore their long-term sequestration capabilities.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"19 ","pages":"Article 100105"},"PeriodicalIF":0.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogeochemical provenance and evolution in Ganhai Well’s groundwater, Eastern Tibetan Plateau","authors":"Guanchun Chen ,&nbsp;Liang Tang ,&nbsp;Long-Fei Gou ,&nbsp;Chuan Jiang ,&nbsp;Yang Xu","doi":"10.1016/j.oreoa.2025.100101","DOIUrl":"10.1016/j.oreoa.2025.100101","url":null,"abstract":"<div><div>The Ganhai Well (27.48° N, 101.46° E), an earthquake monitoring well since September 1980, is situated in the earthquake-prone of the eastern Tibetan Plateau, China. Despite years of monitoring, the hydrogeochemical origins and evolution of groundwater in the well remain unclear. Based on a weekly water sampling in 2022, the hydrochemical characteristics of the Ganhai Well were extrapolated. (1) The groundwater’s ions are derived from evaporite (45.2–48.0 %) and silicate rocks (36.4–40.9 %), followed by carbonate rocks (12.2–15.4 %), and negligible anthropogenic inputs (less than 1 %). In the Ganhai Well, calcite tends to precipitate and crystallise, whereas dolomite maintains equilibrium with the solution. (2) It is a significant observation that the groundwater within the Ganhai Well is deep-seated, confined soda water (HCO₃·Cl-Na type), characterised by minor temporal fluctuations in its ionic concentrations and high stability. This hydrogeochemical profile establishes it as an extremely valuable and sustainable water resource, offering considerable support for regional ecological preservation and economic development.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"19 ","pages":"Article 100101"},"PeriodicalIF":0.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimising gold exploration in Northeast Sudan using analytical hierarchy process with multidisciplinary geodata","authors":"Abu Nasser Hussain,&nbsp;Biswajit Thander,&nbsp;Siddhartha Kumar Lahiri","doi":"10.1016/j.oreoa.2025.100103","DOIUrl":"10.1016/j.oreoa.2025.100103","url":null,"abstract":"<div><div>Orogenic gold deposits, responsible for about one-third of the world’s gold production, typically form in tectonically active zones, where shear zones, suture zones, and faults serve as pathways for hydrothermal fluids, promoting gold mineralisation. Sudan’s diverse geology, characterised by Pan-African terrains within the Arabian-Nubian Shield, is a globally significant gold province with a rich history of ancient and modern mining activities. Despite having a rich legacy of gold exploration, there is an absence of an optimised strategy that helps reduce the cost of exploration. This research aims to seek <em>how a geoscientific decision-making tool, the Analytical Hierarchy Process (AHP), optimises orogenic gold exploration by systematically weighing key geological and geophysical parameters in regions with complex tectonic histories</em>. By evaluating four key parameters, lineament density, mineral composite map, lithological classification and free air gravity anomalies, available through open-access geospatial data sources, and introducing an empirical Relative Gold Mineralised Index (RGMI), this study applies AHP to assign weights to these variables, reflecting their influence on gold mineralisation. This structured approach identifies high-potential gold zones in northeast Sudan and proposes a scalable methodology for strategic orogenic gold exploration in similar geological settings worldwide.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"19 ","pages":"Article 100103"},"PeriodicalIF":0.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic anomaly investigation for mineral potential assessment in the Plateau-Bauchi basement complex, Northern Nigeria","authors":"Ema Abraham ,&nbsp;Moses Emetere","doi":"10.1016/j.oreoa.2025.100102","DOIUrl":"10.1016/j.oreoa.2025.100102","url":null,"abstract":"<div><div>The Plateau-Bauchi Basement Complex in northern Nigeria is a geologically diverse region with significant mineral potential. This study employs an integrated geophysical approach to map the structural framework and mineralization controls within this economically vital region. High-resolution aeromagnetic data were processed using a comprehensive suite of magnetic analysis techniques. The analytical toolkit included Source Parameter Imaging (SPI), Phase Symmetry (PS), Analytic Signal (AS), Tilt Derivative analysis, Butterworth bandpass filtering, 3D magnetic anomaly inversion, and Euler deconvolution. Our results reveal an intricate network of faults, fractures, and intrusive bodies that govern mineralization patterns across the study area. Prominent structural trends (NW-SE, NE-SW, E-W, and N-S) and estimated depths to magnetic sources ranging from near-surface (&lt;420 m) to deeper structures (up to 1330 m) have been delineated. Integration of the geophysical techniques allows for the delineation of high-susceptibility zones corresponding to potential mineral-rich deposits. Strong correlations between geophysical anomalies and known occurrences of economically important minerals, including tin, columbite, kaolin, niobium, and rare earth elements such as tourmaline are observed. Complex fault intersections and intrusive features, particularly in the Kakkek, Durbi, Durr, and Barkin Ladi regions, create favorable conditions for mineral accumulation. This study provides crucial insights into the subsurface architecture of the Plateau-Bauchi basement complex and its relationship to mineralization processes. Our findings establish a robust framework for guiding future exploration efforts and contribute significantly to the understanding of mineral deposit formation in complex geological terrains.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"19 ","pages":"Article 100102"},"PeriodicalIF":0.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Archean Rare Metal (Nb-Ta-Li-Be) bearing Granitic Pegmatite (LCT) in Nagamangala Schist Belt, Dharwar Craton, India: Insights from Uraninite and Zircon mineral chemistry","authors":"Chanchal Sarbajna ,&nbsp;Sudhiranjan Swain ,&nbsp;V.R. Akhila ,&nbsp;K.L. Mundra ,&nbsp;Dheeraj Pande","doi":"10.1016/j.oreoa.2025.100100","DOIUrl":"10.1016/j.oreoa.2025.100100","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The Late Archean rare metal (Nb-Ta-Li-Be) bearing granitic pegmatites of the Nagamangala Schist Belt, Dharwar Craton, India, represent an important geological setting for understanding the mineralogical and geochemical evolution of Lithium-Cesium-Tantalum (LCT) pegmatites. This study provides detailed insights into the mineral chemistry of uraninite and zircon, using Back Scattered Electron (BSE) imaging and quantitative Electron Probe Micro Analysis (EPMA), to characterize their composition, formation history, and evolutionary trends. Subsurface samples of pegmatites from the Marlagalla area reveal the presence of euhedral to anhedral Th-rich uraninite along with unusually high hafnium (Hf) content in the associated zircon-an aspect reported first time from these pegmatites. Uraninite grains are found partially or fully enclosed by phases such as garnet, microlite [(Ca,Na)&lt;sub&gt;2&lt;/sub&gt;Ta&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;6&lt;/sub&gt;(O,OH,F)], tapiolite [(Fe,Mn)(Ta,Nb)&lt;sub&gt;2&lt;/sub&gt;O], zircon and apatite in the studied samples. Uraninite grains exhibit significant compositional variations, with UO&lt;sub&gt;2&lt;/sub&gt; ranging from 64.74 to 70.92 wt %, high ThO&lt;sub&gt;2&lt;/sub&gt; concentrations (up to 10.85 wt %), and PbO content between 23.01 and 25.37 wt %. The rare earth element (REE) content is notably low (RE&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;: 0.15–0.89 wt %), and SiO&lt;sub&gt;2&lt;/sub&gt; is nearly absent (&lt;0.01 to 0.29 wt %). Chemical formula calculations indicate a U&lt;sup&gt;4+&lt;/sup&gt; range of 0.227–0.345 and U&lt;sup&gt;6+&lt;/sup&gt; between 0.301–0.340, suggesting significant auto-oxidation-a hallmark of ancient uraninites. Furthermore, EPMA-based U-Th-Pb chemical age dating of the uraninite suggests a minimum formation age of approximately 2335 ± 54 Ma, making it the oldest reported uraninite in pegmatite from Indian subcontinent.&lt;/div&gt;&lt;div&gt;The associated zircon grains display exceptionally high HfO&lt;sub&gt;2&lt;/sub&gt; content (9.94–20.49 %), coupled with ZrO&lt;sub&gt;2&lt;/sub&gt; (45.56–58.89 %) and SiO&lt;sub&gt;2&lt;/sub&gt; (27.59–30.56 %), categorizing them as hafnian zircons. Their elevated radioactive element content and close association with uranothorite, alongside the high Th content in uraninite, indicate progressive magmatic fractionation. This is further supported by geochemical trends such as the Zr/Hf vs. Hf in zircon and UO&lt;sub&gt;2&lt;/sub&gt;/ThO&lt;sub&gt;2&lt;/sub&gt; vs. ThO&lt;sub&gt;2&lt;/sub&gt; in uraninite. The U&lt;sup&gt;6+&lt;/sup&gt;/U&lt;sup&gt;4+&lt;/sup&gt; ratio close to unity suggests auto-oxidation as the dominant mechanism, reinforced by the high PbO content in these uraninites.&lt;/div&gt;&lt;div&gt;These findings provide crucial insights into the Late Archean Algoman orogeny, a global event marked by extensive granitic plutonism. The Marlagalla pegmatites share key mineralogical and geochemical similarities with other Algoman-related pegmatites, suggesting a possible genetic link. Furthermore, the evolved nature of these pegmatites, in relation to the adjacent Allapatna granite, underscores their complex magmatic history and potential economic significance","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"19 ","pages":"Article 100100"},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143911569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupling reservoir depletion and geomechanics to assess risks during post-blowout well capping: Case study on Macondo","authors":"Andreas Michael,&nbsp;Abdelhakim Khouissat","doi":"10.1016/j.oreoa.2024.100068","DOIUrl":"10.1016/j.oreoa.2024.100068","url":null,"abstract":"<div><div>Reservoir depletion can be consequential to wellbore integrity after a blowout, especially offshore. A prolonged post-blowout discharge extends reservoir depletion. “Underground blowouts” (tensile-fracture initiations) occurring after well capping, or shear-driven slow slippage of naturally-occurring pre-existing faults (PEFs) in the near-well vicinity, can compromise post-blowout wellbore integrity. Upward propagation of the initiated tensile fractures may trigger seafloor broaching by reservoir hydrocarbons.</div><div>This study examines reservoir depletion analytically, evaluating associated geomechanical implications on the <em>in-situ</em> reservoir conditions and assessing the likelihood of tensile-fracture initiation (oriented longitudinally or transversely-to-the-wellbore) during post-blowout-well-capping operations, in addition to shear-driven slow slippage along PEFs in the near-well vicinity. A set of calculational procedures and thinking sequences are presented, necessary for encompassing the primary effects of post-blowout reservoir depletion on the <em>in-situ</em> stress state and the limits of tensile and shear failures that could aid in the appropriate blowout-contingency decision-making.</div><div>Our novel, physics-based scheme (analytical-coupling approach) is applied to parameters from the MC 252–1 “Macondo Well” blowout from April 20, 2010 and the targeted M56 oil reservoir in deepwater Gulf of Mexico (GoM). The reservoir rock is modeled as a porous-permeable medium, considering fluid infiltration to-and-from the pressurized wellbore. The likelihood of an underground blowout correlates with the shut-in wellbore pressure buildup, after successful well capping.</div><div>Elevated reservoir depletion via higher post-blowout-discharge flowrates and longer post-blowout-discharge periods (in terms of time duration) are shown to reduce the shut-in wellbore pressure buildup against time following well capping. The “critical discharge flowrate,” an established predictive indicator for underground blowouts following shut-in of an installed subsea-capping stack (SCS) is employed, using data from the post-blowout-discharge period, suggesting underground blowouts to be highly-unlikely for the set of parameters assessed. Finally, the Mohr-Coulomb criterion indicates that shear-driven slow slippage along PEFs in the near-well vicinity is also unlikely, considering the Macondo Well's bottomhole-wellbore-pressure history in the aftermath of the blowout.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"18 ","pages":"Article 100068"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochemical vectors for targeting hydrothermal gold mineralization in the Damang area, southwestern Ghana: Constraints from petrography, multi-element geochemistry and multivariate statistical analysis","authors":"Emmanuel Daanoba Sunkari ,&nbsp;Arnold Nuru Gan ,&nbsp;Etornam Bani Fiadonu","doi":"10.1016/j.oreoa.2024.100071","DOIUrl":"10.1016/j.oreoa.2024.100071","url":null,"abstract":"<div><div>The Damang Gold Mine in southwestern Ghana sits on two kinds of mineralization: the Tarkwaian paleoplacer and a hydrothermal type found within the Tarkwaian Group's meta-sedimentary rocks. Geochemical vectors related to the hydrothermal gold mineralization in the area are not well known. Therefore, this research was conducted to identify pathfinders for hydrothermal gold mineralization in the Damang area. A total of fifty (50) rock samples were collected from three diamond drill holes focusing on mineralized zones of the holes. The mineralogy of the host rocks was established using petrographic studies of twelve (12) selected representative drill core samples. Multi-element geochemical analysis of the host rocks (<em>n</em> = 50) involving Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) technique was conducted to quantify the trace element concentrations in the host rocks. The multi-element geochemical data was analyzed using multivariate statistics. The petrographic studies showed the abundance of quartz, biotite, pyrite, pyrrhotite, sericite, and minor amounts of feldspars (plagioclase and orthoclase). Al, Mg, Fe, and Ca dominated the geochemical data. The highest Au concentrations were found in Birimian quartz veins and the intrusive lithologies compared to the other lithologies in the region. Most of the data failed the Shapiro-Wilk and Kolmogorov-Smirnov tests. The deviations from normality were shown graphically by Q-Q plots. The centered log-ratio transformation was used to correct this, and the data tested again for normality. Spearman rank correlation showed a positive correlation between Te, Bi, U, Ba, Ag, and Au. When hierarchical cluster analysis was run, three clusters emerged with Au in the same cluster with Te, Ag, and Bi. Factor analysis served as a confirmatory test with Au in the same factor with Bi, Ag, and Te. Datamine Studio RM was used to create drillhole logs showing the anomalies of the three elements and Au with different lithologies downhole, which showed a similitude in the abnormal occurrences. Therefore, hydrothermal gold mineralization in the Damang area is related to Bi-Te-Ag-Au multi-element association.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"18 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction of soil heavy metal content around mine tailings using multiple methods combined with transformed hyperspectral reflectance data","authors":"Chunyu Xiang ,&nbsp;Huxuan Xiao ,&nbsp;Fakun He ,&nbsp;Zhanpeng Dai ,&nbsp;Wenbin Huang ,&nbsp;Bowei Zhu ,&nbsp;Shibin Liu","doi":"10.1016/j.oreoa.2024.100072","DOIUrl":"10.1016/j.oreoa.2024.100072","url":null,"abstract":"<div><div>The extensive accumulation of tailings can potentially cause heavy metal contamination in the surrounding farmland soil. Accurately predicting the spatial distribution of heavy metals in farmland soil is crucial for assessing the potential environmental hazards of tailings.This study focuses on the spatial distribution and the quantitative prediction of heavy metals (chromium (Cr), vanadium (V), and copper (Cu)) in soils surrounding mine tailings using advanced spectral data analysis and multiple prediction models. The original hyperspectral reflectance data were processed using first-order differential (FD), second-order differential (SD), reciprocal logarithmic (LR), and continuum removal (CR) transformations to highlight the positions of characteristic bands. Multiple linear regression (MLR), stepwise linear regression (SLR), partial least squares regression (PLSR), random forest (RF), and back propagation artificial neural network (BP-ANN) models were used to establish inversion models for Cr, V, and Cu based on bands with high correlation coefficients. The performance of the inversion models was evaluated using the coefficient of determination (<em>R²</em>), root mean square error (<em>RMSE</em>), mean absolute error <em>(MAE</em>), and residual predictive deviation (<em>RPD</em>). The results indicate that the raw hyperspectral data from the measured soil exhibit a weak response to heavy metal content in the study area. However, applying FD, SD, and CR transformations significantly enhances the sensitivity of soil spectral data to heavy metal concentrations, facilitating subsequent modeling. Among these, the SD transformation is particularly beneficial for modeling the Cr and Cu elements in the soil. For the V element, the FD transformation yields data that are more suitable for modeling. Regarding the inversion models based on the measured spectral data, the BP-ANN model exhibited the best predictive performance. Specifically, when combined with SD spectral data, the BP-ANN achieved the highest predictive accuracy for Cu content (<em>R²</em> = 0.85, <em>RPD</em> = 2.12). The RF model demonstrated the next best performance, with its optimal inversion model also utilizing SD spectral data for predicting Cu content (<em>R² = 0.76, RPD</em> = 1.90). On the other hand, the MLR model exhibited the poorest performance and is unsuitable for predicting heavy metal content in the region using the measured spectral data. This study highlights the potential of spectral data in environmental monitoring and provides a technical reference for the inversion assessment and regulation of heavy metals in farmlands surrounding tailing sites.</div></div>","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"18 ","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to “Geology and petrography of the volcanic rocks in the Yakhab area, central Iran” [Ore and Energy Resource Geology (2021)100016]","authors":"Kaveh Pazand ,&nbsp;Asghar Ghasemi Bersiani ,&nbsp;Hassan Mohammadnezhad","doi":"10.1016/j.oreoa.2024.100070","DOIUrl":"10.1016/j.oreoa.2024.100070","url":null,"abstract":"","PeriodicalId":100993,"journal":{"name":"Ore and Energy Resource Geology","volume":"18 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}