Ore Geology Reviews最新文献

{"title":"Redox-controlled hydrothermal remobilization of stratabound Zn and Pb mineralization: A case study of the Jiashengpan deposit, northern China","authors":"Chang Yu, Richen Zhong, Wenbo Li, Hao Cui","doi":"10.1016/j.oregeorev.2026.107382","DOIUrl":"10.1016/j.oregeorev.2026.107382","url":null,"abstract":"<div><div>The Jiashengpan deposit in the Langshan–Zhaertai belt, northern China, is a large Zn–Pb deposit in which the present high-grade orebodies have been interpreted as products of late hydrothermal remobilization of earlier stratabound Zn–Pb enrichment. However, the physicochemical process responsible for this remobilization remains unclear. In this study, ore petrography, Raman analysis of fluid inclusions, and thermodynamic modeling were combined to constrain fluid composition and evolution and the mechanism of Zn–Pb remobilization during the late hydrothermal stage.</div><div>Petrographic observations have identified an earlier pyrite–dolomite–quartz assemblage and a later pyrrhotite–sphalerite–galena–quartz assemblage within the same hydrothermal vein. The replacement of pyrite by pyrrhotite and sphalerite, together with the absence of cross-cutting relationships between these assemblages, indicates progressive mineralogical evolution rather than two separate hydrothermal events. Raman analyses of quartz-hosted fluid inclusions, together with previous fluid inclusion studies, indicate that the late hydrothermal fluid involved in Zn–Pb remobilization was a low-salinity, carbon-bearing hydrothermal fluid that evolved from CO<sub>2</sub>-rich to reduced CH<sub>4</sub>-rich conditions. CH<sub>4</sub>-rich inclusions occur in quartz coexisting with pyrrhotite, sphalerite, and galena, suggesting that Zn–Pb sulfide precipitation was closely related to the reduced fluid.</div><div>Thermodynamic modeling indicates that the calculated Zn and Pb solubilities in the low-salinity, CO<sub>2</sub>-rich hydrothermal fluid are about 6–20 ppm and about 2 ppm, respectively. These values are at the lower end of the concentration range reported for natural ore-forming hydrothermal fluids, indicating that the low-salinity, CO<sub>2</sub>-rich hydrothermal fluid can remobilize Zn and Pb but has a limited metal-transport capacity. When the fluid evolved to CH<sub>4</sub>-rich conditions, total Zn solubility decreased by about one to three orders of magnitude, to approximately 0.0026–0.65 ppm, leading to the precipitation of sphalerite. In contrast, the calculated Pb solubility is lower in the CH<sub>4</sub>-rich fluid than that in the CO<sub>2</sub>-rich fluid below 300 °C, but increases rapidly at higher temperatures. This indicates that galena precipitation is favored by fluid reduction and further promoted by cooling of the reduced fluid. Flow-through modeling further indicates that interaction with organic matter in the carbonaceous host rocks can drive the evolution of the fluid from CO<sub>2</sub>-rich to CH<sub>4</sub>-rich conditions and promote substantial Zn–Pb sulfide precipitation. In the flow-through model without organic matter, this redox evolution was limited, and the modeled amounts of precipitated sphalerite and galena were one to two orders of magnitude lower than those in the model with organic matter. These results indicate that late Zn–Pb ","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107382"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148540104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochronology and origin of high-grade Cu mineralization at the Nulasai deposit, western Awulale Cu district, Tianshan, NW China","authors":"Renke Wang,&nbsp;Xiaobo Zhao,&nbsp;Chunji Xue,&nbsp;Hui Luo,&nbsp;Qing Sun,&nbsp;Haixia Chu,&nbsp;Yun Zhao,&nbsp;Wanjin Zhu","doi":"10.1016/j.oregeorev.2026.107375","DOIUrl":"10.1016/j.oregeorev.2026.107375","url":null,"abstract":"<div><div>The western Awulale copper district, located within the heart of the Chinese Western Tianshan, formed in close association with regional Permian volcano-plutonic activity. The Nulasai deposit, the earliest mined area in the district, exhibits a relatively high copper grade (averaging 1.34% Cu). Ore minerals of the Nulasai deposit mainly comprise bornite, chalcocite, and chalcopyrite, with a Cu grade that can reach 3.27% in the main mineralization stage. In this study, we carried out a combined geochronological, lead isotope, and rare earth elements (REEs) investigation to explore the timing and origin of high-grade Cu mineralization at the Nulasai.</div><div>The Re-Os isochron age obtained from bornite and chalcocite in the main mineralization stage is 282.8 ± 3.3 Ma, which is broadly coeval with the hydrothermal apatite U-Pb age of 284.3 ± 7.6 Ma from the ore-bearing quartz monzonite porphyry, confirming their contemporaneity. Lead isotope ratios and REEs distribution patterns of bornite and chalcocite are comparable with the coeval quartz monzonite porphyry and the host Wulang volcanic formation. Contrasting δEu values of bornite and chalcocite indicate that their precipitation may have been controlled by variable oxygen fugacity of the evolving ore-forming fluids. Based on these findings, we propose that the mixing of magmatic hydrothermal fluids and meteoric water led to a decrease in temperature and pressure of the mineralizing fluids, triggering fluid immiscibility and the development of a relatively oxidizing environment. The combination of metal-sulfur ion complexation and the subsequent precipitation of metal-rich sulfides may have formed high-grade copper mineralization in Nulasai.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107375"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148540106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rare earth element enrichment through multi-stage magmatic differentiation and tectono-metamorphic processes: an example from the Hongcheon carbonatite complex, central Korean Peninsula","authors":"Vinod O. Samuel,&nbsp;Yirang Jang,&nbsp;Sanghoon Kwon,&nbsp;Sang-Tae Kim,&nbsp;Sungshil Kim","doi":"10.1016/j.oregeorev.2026.107372","DOIUrl":"10.1016/j.oregeorev.2026.107372","url":null,"abstract":"<div><div>This study investigates igneous and metamorphic pathways of Rare Earth Elements (REE) enrichment in the Hongcheon carbonatite complex in the central part of the Korean Peninsula and its tectonic implications. This Fe- and P-rich carbonatite complex hosts an estimated 382,600 tons monazite ore reserves and is compositionally analogous to the world’s largest Mesoproterozoic Bayan Obo carbonatite complex in China. The Hongcheon carbonatite complex comprises four main units: a dolomite carbonatite (DC), a magnetite segment (MS), a phosphate segment (PS), and an aureole of Na-rich fenite. The DC unit shows an orthocumulate texture, composed of medium-grained dolomite with minor calcite, suggesting the early stages of carbonatite melt differentiation. Whereas subsequent stages formed magnetite and phosphate-rich melt segments, the Na-rich fenite aureole indicates the expulsion of alkali-rich, especially Na-rich, melt/fluid from the carbonatite melt during crystallization. Our geochemical analyses indicate that interaction between the alkali-rich melt/fluid and the country rock does not result in significant REE concentration. Within the Hongcheon carbonatite complex, the PS hosts REE-rich minerals, such as apatite and monazite, whereas apatite and monazite are largely absent from the DC and MS units except where PS occurs. Textural relationships among minerals in the PS suggest that apatite might have preferentially crystallized in Ca- and P-rich melt. Extensive monazite mineralization occurred through apatite dissolution by fluid-assisted recrystallization under amphibolite facies metasomatic conditions, with subsequent calcite and quartz precipitation in the matrix and fracture-filling veins. These results and published (Permo-)Triassic monazite age data suggest that extensive monazite formation was likely influenced by tectono-metamorphic processes, reflecting later metamorphic overprinting shortly after peak (Permo-)Triassic collisional orogeny in the central Korean Peninsula. Overall, this study highlights that Ca-phosphate melts may have an important role in extracting REEs from carbonatite melt, whereas reactive fluids associated with later tectono-metamorphic events likely influence the redistribution and final mineralogical composition of REE ores (e.g., phosphate, fluoride, etc.) in large carbonatite complexes.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107372"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148540105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overcoming the isotropic bias in mineral prospectivity mapping: a direction-aware neural network approach for sandstone-hosted uranium","authors":"Fan Diao,&nbsp;Jianfeng He,&nbsp;Guoyun Zhong,&nbsp;Peng Ding,&nbsp;Junwei Jiang,&nbsp;Zizheng Yu,&nbsp;Fengjun Nie,&nbsp;Fei Xia","doi":"10.1016/j.oregeorev.2026.107369","DOIUrl":"10.1016/j.oregeorev.2026.107369","url":null,"abstract":"<div><div>Mineral prospectivity mapping for sandstone-hosted uranium deposits commonly relies on isotropic distance decay, despite the fact that ore-forming fluids are typically guided by faults and paleochannel systems with strong directional organization. As a result, structurally controlled geological signals may be diffused into quasi-circular anomalies, weakening the geological realism of prospectivity predictions. To overcome this limitation, we propose a Direction-Aware Geographically Weighted Neural Network (DA-GWNN), which embeds expert-defined structural orientation priors into neighborhood weighting to preferentially capture spatial influence along plausible ore-forming directions. In addition, a criteria-based consensus soft-labeling scheme is developed at the grid-cell scale to represent different levels of mineralization evidence under sparse supervision. The method was tested in the Kailu Basin against six benchmark models under nested spatial blocked cross-validation. DA-GWNN achieved the best predictive performance, with a mean AUC of 0.912 ± 0.019 and a mean AUPRC of 0.794 ± 0.026. SHAP analysis indicates that the oxidation–reduction transition zone is the principal control on prospectivity, whereas the role of fault proximity is conditional and varies with the local redox buffering capacity reflected by the gray-sand ratio. Area-constrained analysis shows that the 36.6% P–A envelope captures 78.2% of all positive-labeled cells and represents a basin-scale mineralization-system footprint. Under the stricter economic-positive definition (y = 1.0), DA-GWNN captures 45.0%, 67.5%, and 80.0% of economic positive cells within the Top 5%, Top 10%, and Top 15% cumulative area budgets. These results indicate that DA-GWNN supports a hierarchical exploration workflow from regional system recognition to focused target verification.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107369"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148540035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sandstone-type uranium deposits in China: current research status, future agenda, and a critical review","authors":"Kai Zhao,&nbsp;Fang An,&nbsp;Kaiyun Chen,&nbsp;Zhian Bao,&nbsp;Yan Zhang,&nbsp;Bailin Wu,&nbsp;Yipeng Zhou,&nbsp;Guangrong Li,&nbsp;Honglin Yuan","doi":"10.1016/j.oregeorev.2026.107365","DOIUrl":"10.1016/j.oregeorev.2026.107365","url":null,"abstract":"<div><div>Sandstone-type uranium deposits have become a vital component of China’s uranium resources. Breakthroughs have been achieved in uranium exploration technology, mineralization, leaching process innovation, and post-leaching environment remediation. Exploration is no longer limited to the traditional “grey-black” stratigraphic but has innovatively incorporated the concept of “red-black coupling,” significantly broadening the horizons and scope of exploration. At the theoretical level of uranium ore-forming, a series of ore-forming models have been successfully introduced and deeply studied, including hydrothermal superposition mineralization, bio-mineralization, hydrocarbon reduction mineralization, and exudative mineralization. These mechanisms have not only greatly enriched our understanding of the genesis of sandstone-type uranium deposits but also provided a more solid theoretical foundation for ore-finding practices. In in-situ leaching field, the more environmentally friendly, economical, and efficient CO₂+O₂ leaching has been widely applied. However, the latest environmental assessment results indicate that both H₂SO₄ and CO₂+O₂ leaching processes require a long period of natural remediation to meet regulatory requirements. Therefore, implementing scientific and effective environmental remediation measures for decommissioned areas has become a top priority. Interdisciplinary collaboration is the key force driving the sustainable and resilient development of uranium resources in China. Future research directions will focus on four main aspects: (1) Researchers will develop high-precision analytical techniques and create homogeneous U-Pb dating reference materials to accurately determine the minerals’ geochemical composition and mineralization age. (2) Researchers will integrate multi-source data, including uranium leaching processes, post-leaching environmental remediation, and fluid inclusions in ore-forming fluids, with computer numerical simulation techniques. This integration will facilitate the study of uranium’s migration, enrichment, and precipitation mechanisms in ore-forming environments, thereby enhancing the understanding of its geochemical behavior. (3) Researchers will enhance research in process mineralogy, ion kinetics of leaching fluids, and changes in geological structural physical properties. This research will provide new ideas and methods for addressing practical challenges in uranium leaching. (4) Researchers will closely link theoretical research with practical operations. This linkage will help develop scientific management policies, strengthen legal frameworks, and promote industry standards, ensuring the smooth progress of decommissioned mine remediation and achieving the goal of sustainable green mining.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107365"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148566596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluid physicochemical conditions and critical element enrichment mechanisms of the Yinkeng Pb-Zn-Ag deposit in the eastern Jiangnan Orogen, South China","authors":"Tiantian Liu,&nbsp;Hanjie Wen,&nbsp;Jianjun Wan,&nbsp;Hui Yang,&nbsp;Rui Cao,&nbsp;Lin Xu,&nbsp;Zhengbing Zhou","doi":"10.1016/j.oregeorev.2026.107383","DOIUrl":"10.1016/j.oregeorev.2026.107383","url":null,"abstract":"<div><div>The eastern segment of the Jiangnan Orogen, South China, hosts significant polymetallic Zn-Pb-Ag mineralization related to its complex multi-stage tectonic and magmatic history. The genesis of recently discovered Yinkeng vein-type Pb-Zn-Ag deposit remains poorly constrained, which has hindered a comprehensive understanding of the regional Zn-Pb-Ag metallogenic mechanisms. This study integrates detailed geological investigation, fluid inclusion Raman and microthermometry, and in-situ LA-ICP-MS trace element analysis of sulfides to characterize the ore-forming processes and critical metal endowment of the Yinkeng deposit. Our results reveal that Yinkeng sphalerite is enriched in Fe, Mn, and Cd (up to 17.6 wt%, 2.5 wt%, and 1.1 wt%, respectively) but depleted in Ga and Ge. These elements (Fe, Mn, Cd) are incorporated primarily via isomorphous substitution for Zn²⁺. Galena is significantly enriched in Ag and Sb, which enter the crystal lattice mainly through coupled substitution for Pb²⁺, with aggregates of discrete Ag-bearing minerals also present. Fluid inclusion data and sphalerite geochemistry indicate that mineralization occurred from a reduced, high-temperature (ca. 283.8–397.5 °C) hydrothermal fluid with low to moderate sulfur fugacity (log₁₀fS₂ in the range of − 8.38 to − 10.72). These conditions promoted the enrichment of Mn and Cd, while a decrease in sulfur fugacity during the middle stage facilitated Ag enrichment in the galena and the precipitation of discrete silver minerals such as freibergite and argentite. The trace element signatures (e.g., low Cd/Fe and Cd/Mn ratios of sphalerite, Co/Ni ratios of pyrrhotite) suggest that the Yinkeng vein-type mineralization likely represents the distal mineralization of a magmatic hydrothermal system. This study contributes to a refined regional exploration model for Zn-Pb-Ag ± critical mineralization systems within the eastern Jiangnan Orogen.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107383"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148540107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arsenopyrite geochemistry and sulfur isotopes reveal the genesis of the Liba Au deposit, West Qinling, China","authors":"Likun Yang,&nbsp;Fan Yang,&nbsp;Jiarun Tu,&nbsp;Martiya Sadeghi,&nbsp;Feifan Xu,&nbsp;Qian Wang,&nbsp;Shaoshuai Hu","doi":"10.1016/j.oregeorev.2026.107366","DOIUrl":"10.1016/j.oregeorev.2026.107366","url":null,"abstract":"<div><div>Understanding the genetic type of gold (Au) deposits is crucial for elucidating ore-forming process and guiding mineral exploration. The Liba Au deposit, a representative supergiant deposit (&gt;150 t Au) in the West Qinling Orogen, China, remains controversial regarding its genetic type, Au occurrence state, and metal sources, hindering deep-target exploration. This study employed in-situ microanalytical techniques, including electron probe microanalysis (EPMA) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), to investigate the major and trace element geochemistry and sulfur isotopes of Au-bearing arsenopyrite of the deposit, with the major objective to provide novel insights into its genesis. EPMA results show that arsenopyrite major elements vary from 27.04–36.25 wt% Fe, 17.74–21.97 wt% S, and 41.22–48.09 wt% As, corresponding to formation temperatures of about 290–400 °C, indicative of meso- to low-temperature ore-forming conditions. After normalization to atoms per formula unit (apfu), a strong negative correlation between Fe and Co + Ni (apfu) along the theoretical Fe+(Co + Ni) = 1 substitution line provides direct crystallochemical evidence for Fe²⁺ replacement by (Co, Ni)²⁺ in the arsenopyrite lattice. According to LA-ICP-MS analysis, arsenopyrite has Th/U ratios greater than 1.25, signifying strongly reducing fluid conditions. Correlation analysis of Fe-Au-Ag metals and ionic radius mismatches indicates minimal lattice-bound Au substitution. Instead, Au mainly occurs as nanoscale inclusions of native Au within arsenopyrite, with negligible electrum. LA-MC-ICP-MS sulfur isotopes of arsenopyrite (δ³⁴S = +5.49‰ to +8.83‰, mean +7.44‰) indicate a mixed sulfur source derived from magmatic-hydrothermal fluids and metasedimentary rocks. The decoupling of this crystallographic Co-Ni substitution from As-S variations reveals independent controls by fluid composition and physicochemical conditions. Arsenopyrite Co/Ni ratios show a bimodal distribution (mostly &lt; 1, with some values between 1 and 10), indicating contributions from both the sedimentary protolith and <em>syn</em>-mineralization hydrothermal fluid input. When integrated with the geological setting (e.g., shear zone-hosted orebodies, metasedimentary host rocks), we classify the Liba deposit as a typical orogenic Au deposit. Gold mineralization is interpreted to have occurred through fluid migration along ductile shear zones, with Au precipitating as nanoparticles during fluid-rock interactions under reducing conditions. This study also proposes a multi-scale targeting framework for Au exploration in the West Qinling Orogen, providing robust criteria for regional mineral prospectivity assessment.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107366"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148566597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magmatic-hydrothermal mineralization in central Jiangnan orogenic belt, south China","authors":"Yong Zhang,&nbsp;Minjiang Tang,&nbsp;Qingfei Wang,&nbsp;Jinglei Xiao,&nbsp;Jiayong Pan,&nbsp;Fei Xia,&nbsp;Zhe Xu,&nbsp;Feipeng Dang,&nbsp;Guohua Wang,&nbsp;Shan Chu Han,&nbsp;Xia Zhang,&nbsp;Guang-Xian Liu,&nbsp;Junhao Chen,&nbsp;Huayang Jiang","doi":"10.1016/j.oregeorev.2026.107363","DOIUrl":"10.1016/j.oregeorev.2026.107363","url":null,"abstract":"<div><div>The central Jiangnan orogenic belt in South China harbors a world-class magmatic-hydrothermal mineralization cluster, encompassing supergiant resources of tungsten (W), lithium (Li), copper (Cu), antimony (Sb), and gold (Au). This review synthesizes geological, geochemical, and geochronological data from key deposits to delineate two genetically distinct mineralization series: (1) A Cu-Au-W series associated with I- to S-type porphyry systems, characterized by potassic alteration and silicification; (2) An Nb-Ta-Li-W-Sn-Cu series linked to the evolution of S- to A-type granites, marked by sodic alteration, fluorine-rich muscovitization, and silicification. We propose a unified metallogenic model in which prolonged and episodic magmatism served dual roles: (i) as the source of granite-related rare metal and tungsten mineralization, and (ii) as the thermal engine driving regional hydrothermal circulation. This circulation leached Sb, U, and Au from Precambrian sedimentary sequences, re-precipitating them in structurally controlled sites as intermediate- to low-temperature vein-type deposits. The formation of these diverse yet genetically related deposits is interpreted as the result of extensive crustal magmatism within a unique extensional tectonic regime. This model provides a robust framework for future mineral exploration targeting in this metallogenic belt.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"194 ","pages":"Article 107363"},"PeriodicalIF":4.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148566598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Multi-stage orogenic gold-mineralizing systematics at the Seabee gold Operation, northern Saskatchewan, Canada: Constraints from pyrite chemistry and geochronology” [Ore Geol. Rev. 192 (2026) 107257]","authors":"D. Beaudin ,&nbsp;C.A. Partin ,&nbsp;K. Ansdell ,&nbsp;A. Voinot ,&nbsp;R. Creaser ,&nbsp;R.B. Ickert","doi":"10.1016/j.oregeorev.2026.107283","DOIUrl":"10.1016/j.oregeorev.2026.107283","url":null,"abstract":"","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"193 ","pages":"Article 107283"},"PeriodicalIF":3.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167337","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 metallogenesis of Early Cambrian manganese deposits on the northwestern margin of the Yangtze Platform, South China","authors":"Ji-Min Cai ,&nbsp;Wen-Bin Cheng ,&nbsp;Bo Ran ,&nbsp;Xing-Hai Lang ,&nbsp;Chun-Zhang Wu ,&nbsp;Wen-Li Xu ,&nbsp;Meng-Lin Li ,&nbsp;Zi-Hang Song","doi":"10.1016/j.oregeorev.2026.107180","DOIUrl":"10.1016/j.oregeorev.2026.107180","url":null,"abstract":"<div><div>Abundant microbially textured “spherical” kutnohorite in the Early Cambrian Maowanli Mn deposit provides new constraints on the precipitation mechanism of Mn carbonates. Here we integrate petrography with EDS, EPMA, and TIMA analyses to document mineral assemblages and Mn-bearing phases, and combine major-trace element geochemistry, TOC-TS data, and C-O isotopes to constrain the sources of ore-forming materials and depositional redox conditions. The Maowanli Mn ores are dominated by kutnohorite, Mn-calcite, and alabandite, with abundant framboidal pyrite (mean diameter &lt; 6 μm), organic matter, barite, and hyalophane. The occurrence of hyalophane, together with hydrothermal-related geochemical signatures (e.g., Al/(Al + Fe + Mn) &lt; 0.35 and (Fe + Mn)/Ti &gt; 20), indicates that ore-forming components were mainly supplied by submarine hydrothermal inputs. Framboidal pyrite size distributions and redox-sensitive proxies (e.g., V/(V + Ni), V/Cr, and Ni/Co) suggest that Mn mineralization occurred under a highly dynamic water-column setting with fluctuating dysoxic-suboxic-euxinic conditions. Elevated TOC (&gt;1 wt%), coupled with Cd-Mo systematics, implies relatively high organic matter input and weakly restricted to restricted depositional conditions. Enrichments in TOC, TS, and redox-sensitive trace metals (U, Mo, and V) further support a “sulfidic wedge” was present in a stratified paleo-ocean. Slightly negative Ce anomalies (average 0.63), negative δ¹³Ccarb values (average −6.21‰), and a strong positive Mn-TOC correlation argue against a dominant transformation from Mn oxides/oxyhydroxides. We propose that “spherical” kutnohorite precipitated directly in an anoxic ferruginous environment, mediated by bacterial sulfate reduction (BSR) and extracellular polymeric substances (EPS).</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"190 ","pages":"Article 107180"},"PeriodicalIF":3.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147422359","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}