Journal of Geochemical Exploration最新文献

{"title":"Chemical stability and environmental characterization of alkali-activated mine tailings generated using a MgCO3/MgO industrial residue","authors":"Antonio J. Diosdado-Aragón ,&nbsp;José Miguel Dávila ,&nbsp;Manuel A. Caraballo","doi":"10.1016/j.gexplo.2025.107886","DOIUrl":"10.1016/j.gexplo.2025.107886","url":null,"abstract":"<div><div>Mining tailings are commonly combined with ordinary Portland cement (OPC) and water to form a paste used for mine gallery backfilling (MGBF). Although OPC remains the most frequent choice, alternative alkaline reagents such as Mg(OH)₂ are being investigated due to several limitations: its high cost, a significant carbon footprint associated with its production, and limited long-term durability, especially because of its vulnerability to sulfate attack. This study examines how the use of a MgCO₃/MgO industrial residue affects the environmental behavior of alkali-activated pastes in a wide range of mine tailings (MTs), considering the results obtained from different tests: ABA test, leaching test according to UNE 12457-4 and uniaxial compressive strength (UCS) tests. Various paste formulations were generated using different MgCO₃/MgO concentrations and six very different types of MTs spanning a wide range mineralogical, chemical and acid potential characteristic. As a main conclusion, all alkali-activated pastes, when compared with the original MTs, showed a very important improvement of their environmental behavior, marked by a consistent reduction of their acid generation potential, a water quality improvement of their leachates and their new consideration of inert wastes according to the European regulation for waste acceptance at landfills. While dynamic long-term leaching experiments and reactive transport geochemical models are advisable to better understand the behavior of these type of mine residues under real conditions and in the long term (decades to centuries); the present study shows how the combined application of ABA and UNE 12457-4 tests can offers a reliable initial environmental characterization of alkali-activated mine pastes.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"280 ","pages":"Article 107886"},"PeriodicalIF":3.3,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989840","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}

{"title":"Metallogenic process of the metasedimentary rock-hosted HREE deposit at Guangshui (Hubei Province, Central China)","authors":"Cheng-Lai Deng ,&nbsp;Shao-Yong Jiang ,&nbsp;Xue-Wen Yuan ,&nbsp;Hui-Min Su ,&nbsp;Wei Wang","doi":"10.1016/j.gexplo.2025.107880","DOIUrl":"10.1016/j.gexplo.2025.107880","url":null,"abstract":"<div><div>Guangshui (Hubei Province, Central China) is an exceptional heavy rare earth element (HREE) deposit that occurred within a series of metasedimentary rock (e.g. leptynite). This study integrates detailed petrography with in situ U-Pb geochronology, Nd isotope systematics, and mineral chemistry of the principal REE phases—gadolinite, fergusonite, monazite and xenotime—to reconstruct the timing, sources and mechanisms of mineralization. Two generations of each mineral are recognized on the basis of crystal habit and paragenesis: Gad-I/II, Fgs-I/II, Mnz-I/II, Xtm-I/II. U-Pb dating of Mnz-I yields an age of 239 ± 13 Ma, while Xtm-I records 210 ± 6 Ma. These ages coincide with prograde and retrograde stages of Triassic high-grade metamorphism in the Dabie orogen, underscoring a direct link between regional metamorphism and HREE mobilization. Petrological observations indicate that the Mnz-I marks the crystallization of the earliest HREE assemblage (Fgs-I + Gad-I), whereas Xtm-I brackets the final stage of HREE mineralization. Geochemical variations between the two mineral generations are evident. Mnz-I and Mnz-II exhibit low Th contents, consistent with a hydrothermal origin. Mnz-II is spatially associated with Xtm-II, and its pronounced HREE enrichment coincides with HREE depletion from Xtm-I to Xtm-II, suggesting that Xtm-II formed via alteration of Xtm-I. Positive Ce anomalies in Fgs-I and Gad-I suggest crystallization under oxidizing conditions. Combined with petrological evidence and geochemical variation, the composition of Gad-II may have affected by coeval hydrothermal zircon crystallization. For Fgs-II, hydrothermal alteration likely facilitated substitution of LREE and Ca for HREE and Y at the A-site. Nd isotope compositions of Mnz-I (ε_Nd(t) = −5.1 to −5.6; T_DM2 = 1.38–1.43 Ga) and Mnz-II (ε_Nd(t) = −4.8 to −5.8; T_DM2 = 1.38–1.45 Ga) indicate a crustal source for the ore-forming materials, most likely derived from Mesoproterozoic rocks. Regionally, the phosphorus-rich Huangmailing Formation and Triassic metamorphism played critical roles in HREE enrichment. Overall, the Guangshui deposit exemplifies HREE mineralization controlled by metamorphism and fluid–rock interaction during continental collision, firmly tying its metallogenesis to the Triassic evolution of the Dabie orogen.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107880"},"PeriodicalIF":3.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893910","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}

{"title":"Ore-forming process and fluid development at Nanpo Au deposit, Luang Prabang-Loei Belt (NW Laos): Evidence from H-O-S-Pb isotopes and inclusions","authors":"Wei Wang ,&nbsp;Hui Li ,&nbsp;Jie Gan ,&nbsp;Fuhao Xiong ,&nbsp;Yu Gan ,&nbsp;Bin Wang ,&nbsp;Junqing Mu ,&nbsp;Huan Liu","doi":"10.1016/j.gexplo.2025.107883","DOIUrl":"10.1016/j.gexplo.2025.107883","url":null,"abstract":"<div><div>The Luang Prabang-Loei tectonic belt, as a significant polymetallic metallogenic belt within the Southeast Asian Tethys tectonic domain, hosts numerous gold deposits. However, the current understanding of the genetic types and mineralization processes of these gold deposits remains insufficient, which restricts the advancement of regional metallogenic theories. This study focuses on the newly discovered large-scale Nanpo gold deposit in this metallogenic belt. By systematically conducting analyses of ore deposit geological characteristics, fluid inclusion testing, and H-O-S-Pb isotope analyses, it aims to reveal the sources of ore-forming materials, clarify the properties and evolutionary patterns of ore-forming fluids, and further elucidate the genetic mechanism and the process of mineralization of the deposit. The orebodies of the Nanpo gold deposit typically have lenticular, stratoid, and veined shapes, which are clearly controlled by ductile shear zones. The ores are mainly of two types: quartz vein type and altered rock type. Based on the interpenetrating relationship of veins and the symbiotic assembly of minerals, the metallogenic process of the Nanpo gold deposit can be divided into three stages: (I) quartz-sericite-gold-poor pyrite stage, (II) quartz-polymetallic sulphide stage, and (III) quartz-carbonate mineral stage. With the help of studies on fluid inclusion petrography, microscopic thermometry and laser Raman spectroscopy, it can be found that there are three main types of fluid inclusions in the deposit, namely, NaCl-H₂O, NaCl-CO₂-H₂O and pure CO₂. In general terms, they are part of a NaCl - H₂O - CO₂ ± CH₄ ± N₂ low-temperature to intermediate-temperature/low-salinity fluid system. Using the isotopes S-Pb can be seen, the ore - forming materials come to a large extent from the homogenized lower crust - upper mantle. The H - O isotopes suggest that the ore - forming fluids were of metamorphic water which had an affinity to meteoric waters in the later stage. These evidences suggest that the Nanpo gold deposit is a typical orogenic gold deposit, and its formation is closely associated with the collisional orogeny in Indo - China block after the Paleo — Tethys closed. This study provides a theoretical foundation for the advancement of regional metallogenic theories and offers guidance for regional mineral exploration.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107883"},"PeriodicalIF":3.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907090","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}

{"title":"Genesis and magmatic-hydrothermal evolution of the Silurian Pingtan W deposit, Nanling Range, South China: Constraints from scheelite and apatite geochemistry and geochronology","authors":"Hongfei Di ,&nbsp;Yong-Jun Shao ,&nbsp;David Chew ,&nbsp;Jian-Feng Chen ,&nbsp;Wen-Jie Fang ,&nbsp;Yi-Qu Xiong","doi":"10.1016/j.gexplo.2025.107884","DOIUrl":"10.1016/j.gexplo.2025.107884","url":null,"abstract":"<div><div>A cluster of Silurian W mineralization events have been reported in South China but the ore-forming processes remain not well-constrained, impeding a comprehensive understanding of deposit genesis and hindering the deployment of further exploration programs. In this study, we examine the newly discovered Silurian Pingtan W deposit as a case study. We undertook a comprehensive study of microtextures and geochemistry on scheelite and apatite, and U–Pb geochronology on apatite to determine the timing of W mineralization as well as the origin and evolution of the ore-forming fluids. Based on BSE and CL images, we identify two types of scheelite (Sch) and apatite (Ap): Sch A (A1 and A2) and Ap I in the altered granite-scheelite stage, and Sch B (B1 and B2) and Ap II in the quartz-scheelite stage. The Mo contents and Eu/Eu* ratios of multi-stage scheelite suggest a decrease in fluid <em>f</em>O₂ from the early to late stages within each mineralization phase. The Eu/Eu* ratios of multi-stage apatite indicate an increase in fluid <em>f</em>O₂ from the altered granite-scheelite stage to the quartz-scheelite stage. The Y/Ho ratios of these phases of apatite and scheelite growth imply that the initial fluids originated from the host porphyritic biotite monzogranite, and early-stage apatite crystallization led to the depletion of Y and Ho in scheelite. A support vector machine biplot shows that Ap I is magmatic in origin, while Ap II is hydrothermal in origin. The hydrothermal Ap II yields a U–Pb age of 433.7 ± 9.7 Ma (2σ, MSWD = 1.9), aligning with the emplacement ages (431–430 Ma) of the porphyritic biotite monzogranite. These data imply that the Pingtan W deposit represents a typical altered-granite type W deposit genetically linked to its host Silurian porphyritic biotite monzogranite. In addition, the estimated F and Cl contents in melt and fluid based on their contents in apatite indicate that the volatile-rich altered porphyritic biotite monzogranite has great W mineralization potential. Considering previous studies on the Silurian W mineralization, we propose that the Silurian may represent another significant period for W mineralization in South China, with contemporaneous highly evolved and volatile-rich granites serving as a new exploration target for W deposits.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107884"},"PeriodicalIF":3.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893909","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}

{"title":"Airborne hyperspectral mapping and shortwave infrared spectroscopy of white mica from the Baiyanghe uranium district, Northwest China, with applications in exploration","authors":"Qingjun Xu ,&nbsp;Zhixin Zhang ,&nbsp;Jing Wang ,&nbsp;Ruiwei Li ,&nbsp;Chuan Zhang ,&nbsp;Yilong Wang ,&nbsp;Ding Wu ,&nbsp;Fawang Ye","doi":"10.1016/j.gexplo.2025.107881","DOIUrl":"10.1016/j.gexplo.2025.107881","url":null,"abstract":"<div><div>Airborne hyperspectral and shortwave infrared (SWIR) spectroscopy technology has significant advantages and application prospects in the fine identification and mapping of alteration minerals. The white mica spectra contain rich geological information, including the hydrothermal environment in which white mica formed and its relationship with mineralization. How variations in the chemical components, temperature, and pH of hydrothermal fluid constrain the Al–OH wavelengths of white mica in meso-epithermal deposits is still debated. Moreover, the relationships between uranium mineralization and the spectral parameters of white mica in hydrothermal uranium deposits are poorly understood. In this study, we present shortwave infrared airborne spectral imager (SASI) hyperspectral data, SWIR FieldSpec4 hyperspectral data, petrography data, and geochemical data, including those from X-ray diffraction (XRD), electron probe microanalysis (EPMA), and hydrogen and oxygen isotopes, for white mica from the Baiyanghe uranium district. The SASI airborne hyperspectral alteration mineral mapping shows that the distribution of white mica exhibits distinct zoning characteristics. The SWIR and XRD analyses indicate that the alteration minerals are mainly quartz, chlorite, and illite, with Al–OH absorption wavelengths ranging from 2190 nm to 2220 nm. The geochemical compositions indicate an obvious Tschermak substitution in white mica and suggest that variations in the Al–OH wavelengths of white mica are affected mainly by the Fe and Mg contents and Fe/(Fe + Mg) ratios in addition to the wall rock composition and hydrothermal fluid. The presence of Al-rich (Si-poor) white mica with a shorter Al–OH wavelength at approximately 2200 nm indicates a relatively high-temperature and acidic hydrothermal environment. In contrast, the presence of Al-poor (Si-rich) white mica with a longer Al–OH wavelength at approximately 2200 nm suggests a relatively low-temperature and neutral hydrothermal environment. In addition, white micas close to uranium mineralization in the northern contact zone between the Yangzhuang granite porphyry and the Devonian intermediate–acid volcanic rocks of the Baiyanghe uranium district have shorter Al–OH wavelengths, greater illite spectral maturity index (ISM) values, and lower full width at half maximum at approximately 2200 nm (FWHM2200) values than those not associated with uranium mineralization. The spatial distributions and variations in the Al–OH wavelengths, ISM values, and FWHM2200 values for white mica suggest that a hydrothermal mineralization center may be located in the northern contact zone, indicating that white mica can be used as an important indicator of alteration minerals for uranium exploration in the Xuemisitan uranium metallogenic belt or other hydrothermal deposits.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107881"},"PeriodicalIF":3.3,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896089","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}

{"title":"The lithium mineralization potential of Pan-African pegmatites in Mozambique","authors":"Violeta Lavínia Bunzula ,&nbsp;Axel Müller ,&nbsp;Muriel Erambert ,&nbsp;Valby van Schijndel ,&nbsp;Bernhard Schulz ,&nbsp;Jens Götze ,&nbsp;Sabine Gilbricht ,&nbsp;Jiří Sláma ,&nbsp;Siri Simonsen","doi":"10.1016/j.gexplo.2025.107882","DOIUrl":"10.1016/j.gexplo.2025.107882","url":null,"abstract":"<div><div>The Pan-African rare-element pegmatites of the Alto Ligonha Pegmatite District in northern Mozambique contain abundant Li-rich micas and primary Li aluminosilicates, such as spodumene. Given the rising global demand for Li in the manufacture of Li-ion batteries, these pegmatites are viewed as potential hard rock sources of Li. In this study, five pegmatites from the Alto Ligonha region were investigated to gain a better understanding of the fractionation processes of pegmatite melts that lead to Li enrichment and to assess the economic potential of the Li mineralization. Mica, quartz, and spodumene collected from various zones within these pegmatites were analyzed. Contents of Li, Rb, Cs, Ta, and Tl in mica and of Li and Al in quartz reveal a very strong internal fractionation of the pegmatite melt with progressing crystallization. Li₂O contents in micas increase from 0.1 to 1.4 wt% in the wall zones, to 0.3–1.7 wt% in the intermediate zones, to 1.5–3.8 wt% in the core zones and up to 5.4 wt% in the core zone pockets. Using known mica/melt Li partition coefficients, the Li contents of the melt at the initial crystallization stage was calculated to be between 315 and 3910 ppm for the Li-rich pegmatites. The Li saturation of about 5000 ppm in respect to spodumene crystallization was exceeded for most pegmatites at the final core-zone crystallization. The theoretical calculations confirm field observations that spodumene occurs in pegmatite core zones only. The analyzed spodumene show low and variable bulk Li₂O contents between 1.2 and 3.0 wt%. The low Li contents in spodumene are mainly the result of kaolinization due to tropical weathering. The final deposition of the released Li, however, could not be identified. Inferred resource calculations revealed that the investigated pegmatites contain low Li₂O tonnages. However, spodumene as well as Li-rich mica might be mined selectively as a by-product of gemstone and columbite-tantalite mining.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107882"},"PeriodicalIF":3.3,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913743","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}

{"title":"Major, trace, and Rare Earth Element (REE) characteristics of the mentebteb lateritic iron deposit, northern Ethiopia","authors":"Teklay Gidey ,&nbsp;Miruts Hagos ,&nbsp;Yeman Gebru ,&nbsp;Bheemalingeswara ,&nbsp;Azeb Gebremicale","doi":"10.1016/j.gexplo.2025.107869","DOIUrl":"10.1016/j.gexplo.2025.107869","url":null,"abstract":"<div><div>Rare earth elements (REEs) fractionation and accumulation in Mentebteb lateritic Fe deposits are the key processes with direct implications for REE exploration in weathered terrains. This study investigates the distribution, mobility, and controls on REE behavior across a lateritic weathering profile, using an integrated approach that combines petrographic analysis, X-ray Powder Diffraction (XRD), and geochemical techniques such as Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The profile is divided into three main horizons: a lateritic iron horizon, a clay-rich lateritic horizon, and ferruginous sandstone. In the lateritic iron horizon, hematite is identified as the dominant Fe-bearing mineral, with subordinate goethite and accessory quartz, feldspar, and kaolinite. The Geochemical data reveal that REEs are differentially fractionated and enriched along the profile, with Fe-oxyhydroxides playing a major role in REE accumulation, particularly in the lateritic iron horizon. The positive correlations between Fe, Cr, V, Co, Ni, and ΣLREE/ΣHREE ratios suggest selective sorption and co-precipitation of REEs with Fe phases in the lateritic iron horizon. In contrast, the negative correlation between Al₂O₃ and these elements in the upper lateritic horizon suggests a negligible role of clay minerals in REE retention. However, Al₂O₃ exhibits variable correlations with V (<em>r</em> = 0.27; <em>r</em> = −0.37), Cr (<em>r</em> = 0.61; <em>r</em> = −0.79), Ni (<em>r</em> = 0.52; <em>r</em> = −0.48), and Co (<em>r</em> = 0.65; <em>r</em> = −0.52) in the clay-rich lateritic and ferruginous sandstone layers, indicating that clay minerals influence element mobility in the clay-rich horizon but have minimal impact in the ferruginous sandstone. REE fractionation patterns is evidenced by La/Y ratios is depleted in the lateritic iron horizon (La/Y &lt; 1, 0.87–0.99) and enriched in the clay-rich horizon (La/Y &gt; 1, 1.08–1.36) and ferruginous sandstone (La/Y &gt; 1, 1.27–1.76). These variations in the REE dispersion and fractionation trends are controlled by weathering intensity, redox conditions, acid dissolution, mineral breakdown and differential solubility effects which drive leaching, complexation, and secondary enrichment processes. The observed REE behavior underscores the importance of lateritization in concentrating critical metals and provides geochemical criteria for vectoring towards REE-enriched zones. This study highlights the importance of lateritization processes in REE accumulation and provides a framework for REE exploration in weathered Fe deposits, particularly in lateritic terrains.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"278 ","pages":"Article 107869"},"PeriodicalIF":3.3,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722419","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}

{"title":"Improving spatial interpolation for anomaly analysis in presence of sparse, clustered or imprecise data sets","authors":"Stéphane Belbèze ,&nbsp;Jérémy Rohmer ,&nbsp;Dominique Guyonnet ,&nbsp;Philippe Négrel ,&nbsp;Timo Tarvainen","doi":"10.1016/j.gexplo.2025.107868","DOIUrl":"10.1016/j.gexplo.2025.107868","url":null,"abstract":"<div><div>In this study, we present a new method of interpolation and anomaly detection especially designed for sparse, clustered or imprecise environmental data (SIC). Such data cannot be processed by current state of the art spatial methods and models, including the most widely used, such as kriging. Indeed, the statistics obtained on SIC data (on the order of 5–30) do not allow us to define a covariance or to calibrate the numerous hyper-parameters of sophisticated Bayesian or deep image prior models. We therefore adapted an information dissemination algorithm to handle SIC data. This probabilistic model has been enriched (anisotropy, de-clustering, auto-variography, multi-support, treatment of covariates, and censored data) in a way that fully meets the needs for environmental SIC data and can be used in conjunction with hybrid propagation of epistemic and aleatoric uncertainties and anomaly detection, whatever their mathematical form. The new interpolator for anomaly detection was applied on a very small set of 13 sparse data points characteristic of small-scale environmental studies, on digital-challenge datasets and on two real datasets, i.e., a large-scale geochemical dataset and a SIC urban soil dataset. Results highlight the added value of the proposed algorithm, that is able to pinpoint anomalies in SIC data, while avoiding in particular the smoothing effects of certain previous methods.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107868"},"PeriodicalIF":3.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829533","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}

{"title":"Indoor radon and its relationship with rock uranium concentration in western Liguria (Italy)","authors":"Linda Bonorino ,&nbsp;Gianluca Beccaris ,&nbsp;Paolo Chiozzi ,&nbsp;Andrea Cogorno ,&nbsp;Elga Filippi ,&nbsp;Sonja Prandi ,&nbsp;Massimo Verdoya","doi":"10.1016/j.gexplo.2025.107867","DOIUrl":"10.1016/j.gexplo.2025.107867","url":null,"abstract":"<div><div>We recorded indoor radon concentrations in dwellings and measured uranium, thorium and potassium contents in rocks of western Liguria (Italy). This area, characterised by a wide geo-lithological variability with rocks spanning from sedimentary to metasedimentary and metavolcanic, was never deeply investigated for indoor radon or uranium concentration. High levels of indoor radon concentration, exceeding 200 Bq m⁻³, were recorded in buildings located on the pre-Mesozoic basement that crops out for approximately 65 % of the survey area and shows a maximum average uranium concentration of about 7 mg kg⁻¹. The uranium and the indoor radon concentrations measured on the same lithological groups are strictly correlated. Indoor radon concentrations &gt;200 Bq m⁻³ are mostly recorded when the rock uranium content exceeds 4.5 mg kg⁻¹. We suggest that the uranium‑radon correlation can be used as an effective baseline for studies of radon potential evaluation.</div></div>","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"278 ","pages":"Article 107867"},"PeriodicalIF":3.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679584","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}

{"title":"Corrigendum to “Molybdenum and gold distribution variances within Iranian copper porphyry deposits” [J. Geochem. Explor. 261 (June 2024) 107471]","authors":"Seyed Mehran Heidari ,&nbsp;Peyman Afzal ,&nbsp;Behnam Sadeghi","doi":"10.1016/j.gexplo.2025.107854","DOIUrl":"10.1016/j.gexplo.2025.107854","url":null,"abstract":"","PeriodicalId":16336,"journal":{"name":"Journal of Geochemical Exploration","volume":"279 ","pages":"Article 107854"},"PeriodicalIF":3.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018552","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}