Ore Geology Reviews最新文献

{"title":"Petrogenesis of Early Cretaceous Duorenlieqian igneous rocks (113 ∼ 117 Ma) in the western Bangong-Nujiang metallogenic belt, Tibet, China: Implications for tectono-magmatic evolution and porphyry Cu-Au mineralization","authors":"Hao Sun , Yang Song , Jamie J. Wilkinson , Zhibo Liu , Ming Zheng , Beiqi Wang","doi":"10.1016/j.oregeorev.2025.106650","DOIUrl":"10.1016/j.oregeorev.2025.106650","url":null,"abstract":"<div><div>Porphyry copper deposits are classic products of arc magmatic activity at convergent plate boundaries. Understanding the signatures of arc magmas is essential for reconstructing the dynamic evolution of plate boundaries and predicting copper resource potential. The southern Qiangtang subterrane in the Bangong-Nujiang metallogenic belt hosts several subduction-related porphyry and epithermal copper-gold deposits. However, such deposits are quite scarce in the northern Lhasa subterrane, where the potential for subduction-related porphyry copper mineralization remains poorly understood. Here we present zircon U-Pb geochronology, trace elements, Hf isotopes, and whole-rock geochemical compositions for newly discovered mafic to felsic igneous rocks in the Duorenlieqian area, northern Lhasa subterrane. The zircon U-Pb geochronology results show that the hornblende gabbro, diorite porphyry and quartz diorite formed at 114.4 ± 0.9 Ma, 116.8 ± 1.5 Ma, and 113.4 ± 1.7 Ma, respectively. The hornblende gabbro and diorite porphyry exhibit arc magmatic geochemical affinities with low SiO<sub>2</sub> contents (48.4–53.0 wt% and 52.3–56.4 wt%, respectively), high Mg<sup>#</sup> values (49–51 and 46–50, respectively), depleted whole-rock Sr-Nd isotopic compositions [(<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub> = 0.7040 to 0.7043, 0.7053 to 0.7055, respectively; ε<sub>Nd</sub>(t) = +4.20 to + 5.96, +2.72 to + 5.06, respectively] and zircon Hf isotopic compositions [ε<sub>Hf</sub>(t) = +11.8 to + 15.4, +9.1 to + 11.3, respectively]. Additionally, they have high Th/Ce and Th/Nb ratios, as well as variations in Nb/Zr ratios. These characteristics suggest that they were likely derived from mantle wedge metasomatized by hydrous sediment melts. The quartz diorite, sharing arc magmatic affinities but relatively more enriched whole-rock Nd isotopic compositions (+2.09 to + 3.48) and lower Mg<sup>#</sup> (34–48) values compared to the gabbro and diorite porphyry, is interpreted to be derived from partial melting of juvenile lower crust with minor mantle input. Based on our new data, integrated with recent studies, we propose that during the same geological period (113 ∼ 117 Ma), the Bangong-Nujiang Ocean basin exhibited a diachronous geodynamic background from east to west, characterized respectively by lithospheric delamination, slab break-off and slab roll-back. This provides new evidence for the diachronous closure of the Bangong-Nujiang Ocean from east to west during the Cretaceous. The diorite porphyry and quartz diorite have similarly high zircon Eu<sub>N</sub>/Eu<sub>N</sub>* ratios (averaging 0.62 and 0.56, respectively) that are comparable to those of fertile igneous rocks formed in comparable tectonic settings, but they contain notably higher zircon Ti contents (averaging 15.5 ppm and 9.5 ppm, respectively). This suggests that although these magmas are relatively water-rich, they have not yet reached the super-wet conditions that are fundamental to por","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"182 ","pages":"Article 106650"},"PeriodicalIF":3.2,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904109","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":"Copper and gold metallogeny in West China: An overview","authors":"Huawei Li ,&nbsp;Zhiming Yang","doi":"10.1016/j.oregeorev.2025.106644","DOIUrl":"10.1016/j.oregeorev.2025.106644","url":null,"abstract":"<div><div>West China, straddling the Tethyan and Central Asian metallogenic domains, is a significant region for copper and gold resources. To better understand these deposits’ spatial-temporal distribution, Cu-Au resource characteristics, and metallogenic features in different metallogenic domains, we conducted a data compilation on key information from 267 Cu-Au deposits in four metallogenic domains (the Central Asian, Proto-Tethys, Paleo-Tethys, and Neo-Tethys) of West China. Based on our comprehensive database, major characteristics of copper and gold mineralization in West China include: diverse deposit types, dominant Cu-Au resource contribution of porphyry and orogenic deposits, post-subduction dominance, and the Neo-Tethys importance. This overview enhances our understanding of copper and gold resources in Western China, offering a foundational reference for comparative studies and guiding future resource exploration efforts.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"182 ","pages":"Article 106644"},"PeriodicalIF":3.2,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898612","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":"Petrogenesis and evolution of internally zoned pegmatites: A tourmaline perspective from the Dakalasu deposit, Chinese Altai","authors":"Yong-Qi Xia ,&nbsp;Ming-Jie Tuo ,&nbsp;Nuo Li ,&nbsp;Nuerkanati Madayipu ,&nbsp;Chao Zhang ,&nbsp;Li-Ning Cheng ,&nbsp;Wen-Bo Wang ,&nbsp;Dong-Mei Qi","doi":"10.1016/j.oregeorev.2025.106624","DOIUrl":"10.1016/j.oregeorev.2025.106624","url":null,"abstract":"<div><div>The role of fractional crystallization and partial melting on pegmatite is controversial. To constrain the evolution and petrogenesis of internally zoned pegmatites, we selected the Dakalasu No. 1 pegmatite dike, Chinese Altai, as a case, and used tourmaline as a probe. Tourmalines were developed along the boundary between pegmatite and the host biotite granite porphyry (Tur B_Ⅰ), at the border zone Ⅱ (Tur B_Ⅱ) and further at the intermediate zone (Tur IM), but absent in the central zone of the pegmatite. All the tourmalines belong to alkaline schorl series. Tur B_Ⅰ exhibits elevated concentrations of Mg (3.42–4.63 %) and V (104.2–263.4 ppm), coupled with low Al content at Y site, indicative of interaction between pegmatite and the host biotite granite. Tur B_Ⅱ and Tur IM have high ratios of Fe/Mg (5.00–6.70), but low Mg/(Mg + Fe) (0.13–0.18), suggestive of a magmatic origin. The contents of rare metals (Li, Be, Nb, Ta, and Sn) of tourmaline increase inward, whereas the contents of Mg, Ca, Sr, Ni, V, Cr and the ratio of Mg/(Mg + Fe) decrease, suggesting a sequential evolution from the border to the intermediate zone. All tourmalines contain low content of Li, indicating a limited fractional crystallization. Boron isotopes (δ¹¹B = −15.84 ‰ – −14.55 ‰) in tourmaline indicate that the pegmatite dike originates from the low-degree partial melting of metasedimentary rocks, rather than fractional differentiation of the host granite. We propose that tourmaline in zoned pegmatites can be employed as a pathfinder to explore the petrogenesis and evolution of pegmatite.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106624"},"PeriodicalIF":3.2,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882996","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":"Zircon trace elemental and Hf-O isotopic constraints on the petrogenesis of the REE-fertile and barren alkaline rocks in the South Qinling Belt, China","authors":"Zhihui Zha ,&nbsp;Wei Zhang ,&nbsp;Ronglin Ma ,&nbsp;Youwei Chen ,&nbsp;Wei Terry Chen","doi":"10.1016/j.oregeorev.2025.106641","DOIUrl":"10.1016/j.oregeorev.2025.106641","url":null,"abstract":"<div><div>Alkaline silicate rocks and/or associated carbonatites are important hosts of rare earth elements (REE) resources. Previous studies have suggested that REE-fertile alkaline rocks and/or carbonatites were derived from a mantle source that may have once been metasomatized by recycled crustal materials. However, it is still not clear if the source metasomatism is a prerequisite of REE mineralization. In this study, we investigated and compared both REE-fertile and barren alkaline plutons in South Qinling, Central China with emphasis on zircon elemental and Hf-O isotopic compositions. The REE-fertile alkaline pluton, i.e. the Miaoya (MY) complex, is dominated by syenite with minor coeval carbonatite dykes/stocks, whereas the REE-barren alkaline plutons, i.e. the Huangyangshan (HYS) and Guanzishan (GZS) plutons, are composed mainly of quartz-bearing syenite without carbonatites. Our new U-Pb dating of magmatic zircon demonstrates that the fertile and barren alkaline complexes have identical ages of ca. 440 Ma. The syenites in both fertile and barren alkaline plutons have similar affinities of A-type granitoids with comparably high Ti-in-zircon temperatures of 632 to 878 °C. In particular, the fertile syenites have zircon Hf and O isotopic compositions (ε_Hf(t): −3.4 to + 8.2, δ¹⁸O: +3.3 to + 6.9 ‰) also broadly similar to the barren syenites (ε_Hf(t): −1.6 to + 10.1, δ¹⁸O: +3.5 to + 8.0 ‰), indicating that they may be sourced from a common, enriched mantle source that likely included components from oceanic crustal material, such as sediments and/or altered oceanic crust. However, compared to the fertile syenites, the barren syenites exhibit much higher SiO₂ (up to 75 %) but lower MgO contents, and thus were suggested to be likely formed through partial melting of a juvenile mafic lower crust. It is reasonable to speculate that the mafic lower crust was likely formed from mafic magmas derived from the enriched mantle due to their undistinguishable zircon Hf and O isotopic ratios. Zircon trace element analyses reveal that the barren syenites exhibit ΔFMQ values (+0.95 to + 6.74) obviously higher than those of the fertile syenites (−1.14 to + 0.88), indicating a more oxidized source characteristic. Since an oxidized source is conducive to carbon stability, promoting the formation of carbonatite-bearing syenite complexes (which are favorable for REE mineralization), the absence of carbonatites in the relatively oxidized Huangyangshan and Guanzishan syenites might be attributed to a lack of carbon in their source. Our findings emphasize the critical role of oceanic crust recycling in producing REE-fertile, carbonaceous silicate melts and underscore that source variations exert a primary control on REE fertility of alkaline plutons within specific alkaline magmatic belts.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"182 ","pages":"Article 106641"},"PeriodicalIF":3.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907023","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":"Revealing the distribution and efficient enrichment of cobalt in a Cu–Au skarn mineralization system","authors":"Shitao Zhang ,&nbsp;Jian-Feng Gao ,&nbsp;He Zhang ,&nbsp;Xiao-Wen Huang ,&nbsp;Jianping Li ,&nbsp;Rucao Li ,&nbsp;Hao Xu","doi":"10.1016/j.oregeorev.2025.106643","DOIUrl":"10.1016/j.oregeorev.2025.106643","url":null,"abstract":"<div><div>Cobalt (Co) has become one of the most indispensable key metals globally, underpinning numerous industries and driving technological breakthroughs, particularly in the field of new energy electric vehicles. Skarn ore deposits are a significant source of cobalt reserves, and in China, cobalt-bearing skarn deposits account for about 28 % of the country’s total cobalt reserves. The Middle–Lower Yangtze River Metallogenic Belt (MLYRB) in eastern China stands as an important Cu–Au–Fe–Co polymetallic ore belt. However, previous research initiatives have focused primarily on cobalt associated with Fe skarn deposits, leaving the exploration of cobalt occurrence and enrichment in Cu–Au skarn deposits within the MLYRB unexplored. The Tonglushan deposit (86.3 Mt @ 1.66 % Cu, 0.94 g/t Au, 39.4 % Fe and 0.012 % Co) is representative Cu–Au polymetallic skarn deposit in the MLYRB, characterized by medium-scale cobalt mineralization. In this study, we conducted a comprehensive investigation into the distribution and enrichment patterns of cobalt at Tonglushan through detailed petrographic observations, SEM, LA–ICP–MS, TEM, and in situ S isotope analysis. The results show that cobalt primarily exists in pyrite (Pyb1 avg. 3827 ppm; Pyb2 avg. 2067 ppm), sphalerite (avg. 653 ppm), and magnetite (avg. 324 ppm) within the skarn mineralization centre at Tonglushan. Elemental correlation analysis and TEM investigations reveal that Co and Ni predominantly substitute for Fe²⁺ in magnetite and pyrite, while Co and Fe primarily replace Zn²⁺ in sphalerite through isomorphic substitution. Moreover, in the early alteration stages, the high temperature and high salinity of hydrothermal fluids facilitate the efficient migration of cobalt in the form of CoCl₄^2-. In the subsequent ore-forming stage, fluid mixing and cooling lead to a decrease in oxygen fugacity, which is the main factor responsible for cobalt precipitation. Our finding further highlights that the sulfide-rich magnetite ores in the Cu-Au and Fe skarn mineralization centre may hold significant potential for exploration and exploitation of cobalt resources within the MLYRB in eastern China.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106643"},"PeriodicalIF":3.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883018","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":"GeoMinLM: A Large Language Model in Geology and Mineral Survey in Yunnan Province","authors":"Yu Fu ,&nbsp;Mingguo Wang ,&nbsp;Chengbin Wang ,&nbsp;Shuaixian Dong ,&nbsp;Jianguo Chen ,&nbsp;Jiyuan Wang ,&nbsp;Hongping Yu ,&nbsp;Jing Huang ,&nbsp;Liheng Chang ,&nbsp;Bo Wang","doi":"10.1016/j.oregeorev.2025.106638","DOIUrl":"10.1016/j.oregeorev.2025.106638","url":null,"abstract":"<div><div>In recent years, the development of artificial intelligence and big data technologies has led to the advancement of tools and solutions for transforming the geological and mineral survey paradigm, which requires a large amount of geological knowledge in a complex and arduous working environment. The large language model (LLM) has a significant advantage in answering generative intelligent questions. However, LLMs for general fields have limitations in answering professional questions in a vertical domain like geology. To overcome this challenge, we proposed and developed GeoMinLM, an LLM for geological and mineral exploration scenarios in Yunnan Province, and explored its applications in intelligent Q&amp;A. Leveraging a proprietary dataset of 5.16 million words in geology and mineral exploration, we trained GeoMinLM based on Baichuan-2, achieving superior performance through fine-tuning and hyperparameter optimization. By integrating expert knowledge via a knowledge graph, we significantly reduced hallucinations and enhanced professionalism. This study proves that GeoMinLM is helpful for accurate information retrieval and knowledge dissemination, thereby supporting the intelligent advancement of geological and mineral fields.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"182 ","pages":"Article 106638"},"PeriodicalIF":3.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898610","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":"Uranium and U-bearing minerals in the Husab uranium deposit in Namibia: Occurrence, composition, age, and implications for uranium mineralization process","authors":"Kai Xu ,&nbsp;Guanglai Li ,&nbsp;Huaifeng Zhang ,&nbsp;Wenming Dong ,&nbsp;Xiaodong Liu ,&nbsp;Xiongjie Zhang ,&nbsp;Bin Wu ,&nbsp;Renbo Wang","doi":"10.1016/j.oregeorev.2025.106642","DOIUrl":"10.1016/j.oregeorev.2025.106642","url":null,"abstract":"<div><div>The Husab uranium deposit in Namibia is one of the largest alaskite-type uranium deposits in the world. However, few studies have been carried out on this deposit, especially on uranium and U-bearing minerals, greatly limiting the understanding of the deposit’s genesis. Accordingly, based on the α-track etching experiment, this study carried out fine mineralogical analysis of uranium ore using a polarizing microscope (PM), scanning electron microscope (SEM), and electron probe X-ray microanalyzer (EPMA). The types of uranium and U-bearing minerals were determined, and the mineralization stages were divided. Three mineralization stages are believed to exist in the Husab uranium deposit: magmatic, hydrothermal alteration, and supergene leaching. Among them, the magmatic mineralization stage is the main stage, and uraninite is the most important uranium mineral. The uranium minerals formed in this stage include monazite, zircon, and rutile. The uranium minerals in the hydrothermal alteration stage primarily comprise pitchblende and coffinite, while those in the supergene leaching stage include uranothorite, coffinite, boltwoodite, sodium boltwoodite, and uranophane. Based on the mineralogical analysis and mineralization stage division described above, the EPMA chemical U–Th–Pb dating of uraninite was carried out by selecting uraninite and its associated monazite as <del>the</del> dating minerals. The weighted average age of uraninite was 500.4 ± 1.8 Ma (mean squared weighted deviation (MSWD) = 1.12, <em>n</em> = 46/49). Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) <em>in situ</em> U-Pb isotope dating was carried out at certain probe <del>test</del> points, and the ²⁰⁶Pb/²³⁸U weighted average age of uraninite was 498.2 ± 2.4 Ma (MSWD = 0.41, <em>n</em> = 24). The monazite associated with uraninite was selected for LA-ICP-MS <em>in situ</em> U-Pb isotope dating, and the weighted average ²⁰⁶Pb/²³⁸U age of monazite was 499.7 ± 2.4 Ma (MSWD = 2.1, <em>n</em> = 23). The ages of the three groups are highly consistent, indicating that the main metallogenic age of the Husab uranium deposit is approximately 500 Ma. The deposit originated in a decompressive and tensional environment following the collision of the Kalahari and Congo cratons. The <em>in situ</em> trace element test results for uraninite revealed a low U/Th ratio (8.49–15.08, mean: 9.99) and high REE content. The ∑REE is between 12,852 × 10⁻⁶ and 25,019 × 10⁻⁶, with an average of 18,041 × 10⁻⁶, indicating that uraninite has a<!--> <!-->magmatic origin<!--> <!-->(consistent with the magmatic mineralization stage identified earlier). Moreover, the abundant secondary uranium minerals in the ores may contribute to the formation of high-grade uranium ores in the Husab uranium deposit.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"182 ","pages":"Article 106642"},"PeriodicalIF":3.2,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891592","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":"Is there superimposed mineralization occurring within the Longshan Sb-Au deposit, South China? A perspective from U-Pb dating of apatite and in-situ S isotopes of pyrite and stibnite","authors":"Xia-Nan Hou ,&nbsp;Shan-Ling Fu ,&nbsp;Hua Kong ,&nbsp;Biao Liu ,&nbsp;Yan-Wen Tang ,&nbsp;Jin-Gang Huang","doi":"10.1016/j.oregeorev.2025.106631","DOIUrl":"10.1016/j.oregeorev.2025.106631","url":null,"abstract":"<div><div>The Longshan deposit, located in the Xiangzhong metallogenic Province (XZMP), South China, is a large-scale Sb-Au deposit with substantial reserves (Sb: 143,000t, Au: 15.5 t). Despite its economic importance, the genesis of the deposit remains enigmatic and the subject of ongoing debate, primarily due to uncertainties regarding its mineralization age and its link with regional granitic magmatism. Mineralogical investigations have revealed the occurrence of apatite within the Sb ore veins, where it is closely associated with scheelite and stibnite. Apatite displays elevated REE contents, MREE-enriched patterns with positive Eu anomalies, which suggest its hydrothermal origin. Consequently, the apatite U-Pb age provides a robust constraint on the timing of Sb mineralization at the Longshan Sb-Au deposit. Cathodoluminescence (CL) images reveal that apatite typically exhibits a core-rim texture, comprising an early-stage core apatite (Ap1) and late-stage rim apatite (Ap2). U-Pb dating of Ap1 proved unsuccessful due to high common Pb concentrations, while LA-ICP-MS U-Pb dating of Ap2 yielded a Tera-Wasserburg lower intercept age of 159 ± 13 Ma, which likely reflects the timing of late-stage mineralization at the Longshan deposit. The new data indicate that the Longshan deposit experienced the superposition of Late Jurassic mineralization, in addition to the previously documented Late Triassic mineralization event. <em>In-situ</em> sulfur isotope measurements of stibnite and pyrite from different mineralization periods revealed δ³⁴S values ranging from −2.37 ‰ to + 6.04 ‰, which indicate that sulfur in the ore-forming fluids at Longshan likely originated predominantly from buried magmas. A weak upward trend in δ³⁴S values from deeper to shallower levels indicates the minor contributions from host rock sulfur. Integrated with early chronological data and mineralogical observations, these findings suggest that the Longshan is a magmatic-hydrothermal Sb-Au system formed through the superposition of Late Triassic and Late Jurassic mineralization events.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106631"},"PeriodicalIF":3.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883020","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":"Geological characteristics, fluid inclusion, and isotope systematics of the Zhongshangou gold deposit, northern margin of the North China Craton: A comparative study with the Dongping deposit and implications for regional mineralization","authors":"Chengyang Wang ,&nbsp;Wei Chen ,&nbsp;Jiajia Yu ,&nbsp;Junkang Zhao","doi":"10.1016/j.oregeorev.2025.106629","DOIUrl":"10.1016/j.oregeorev.2025.106629","url":null,"abstract":"<div><div>The Zhongshangou deposit, located in the Zhang-Xuan ore concentration area, Hebei Province, China, is a representative Te-rich gold deposit related to alkaline intrusion. For the purpose of revealing the ore-forming characteristics, a comprehensive study was conducted on the ore deposit geology, fluid inclusions, laser Raman spectroscopy, and isotopes of H, O, C, S, and Pb. Fluid inclusion data and laser Raman spectroscopy indicate that the fluids responsible for Au–Te mineralization belong to a H₂O-CO₂-NaCl system, characterized by medium temperatures and low salinities. The hydrogen (δD = −98.1 ‰ to −78.7 ‰) and oxygen (δ¹⁸O_SMOW = −7.5 ‰ to 12.5 ‰) data suggest that the ore fluids of Zhongshangou were originally magmatic sourced. The δ¹³C_V-PDB values of calcite samples (0.7 ‰ to 1.9 ‰) overlap with those of igneous carbon, and the δ¹³C_V-PDB values of CO₂ extracted from fluid inclusions also show similar characteristics to mantle-derived fluids (−16.9 ‰ to −13.2 ‰). The δ³⁴S values of mineralization-associated sulfides have a large range of variations (−19.1 ‰ to −5.3 ‰), implying that the physical and chemical conditions for mineralization have undergone drastic changes. These abrupt fluctuations in ore-forming geochemistry are conducive to anomalous gold enrichment and its coexistence with tellurium. The ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb, and ²⁰⁸Pb/²⁰⁴Pb ratios of mineralization-associated sulfides are 17.24 to 18.08, 15.42 to 15.64, and 37.17 to 38.55, respectively, overlapping with those of deeply sourced alkaline rocks. Similar ore-hosting rocks, mineral assemblages, fluid inclusion types, and comparable stable isotope compositions suggest that the Dongping and Zhongshangou deposits have a common origin and formed in a simultaneous magmatic hydrothermal system.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"182 ","pages":"Article 106629"},"PeriodicalIF":3.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917826","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":"Geochronology and petrogenesis of late triassic-early jurassic LCT pegmatites from the Yamon-Kazat area, southern Myanmar: Implications for magmatic evolution","authors":"Aye Pyae Phyo ,&nbsp;Huan Li ,&nbsp;Aung Zaw Myint ,&nbsp;Xiao-Jun Hu ,&nbsp;Mohamed Faisal","doi":"10.1016/j.oregeorev.2025.106633","DOIUrl":"10.1016/j.oregeorev.2025.106633","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The Mesozoic granitoids in the Southeast Asia Tin Belt, stretching over 2800 km from Myanmar to Indonesia, represent a significant geological and economic resource due to their association with diverse mineral resources and complex tectonic history. Despite the extensive documentation of magmatic phases within this belt, there have been no records of Late Triassic to Early Jurassic magmatism in southern Myanmar until recent investigations. A systematic geological study in the Yamon-Kazat (YK) area of the Myeik Sn-W district in southern Myanmar addresses this gap by focusing on the age, petrogenesis, and tectonic context of Jurassic magmatism. This study integrates field work, petrographic identification, bulk geochemistry data, in situ zircon U-Pb-Lu-Hf isotopic analyses, and zircon trace element chemistry. Field studies in the YK area identified granitic pegmatites occurring as small-scale intrusions, veins, and dyke swarms. These pegmatites display mineralogical assemblages dominated by quartz, alkali-feldspar, plagioclase, lepidolite, and muscovite with minor alteration minerals (sericite, chlorite, and iron oxides). Geochemically, the parental magma of YK pegmatites is derived from S-type granitic sources and exhibits a moderately peraluminous affinity. They are enriched in Li (178–&gt;10,000 ppm), Sn (93–&gt;10,000 ppm), Rb (325–&gt;10,000 ppm), Cs (21–1800 ppm), Ta (20–173 ppm), Nb (42–167 ppm), and Be (23–407 ppm). They show a negative Eu anomaly (average Eu/Eu*&lt;!--&gt; &lt;!--&gt;=&lt;!--&gt; &lt;!--&gt;∼0.69) and moderate enrichment of light rare-earth elements, revealing geochemical signatures similar to Lithium–Cesium–Tantalum (LCT) pegmatite. The zircon chemistry displays high contents of U, Th, Pb, Y, and REEs, suggesting generation through extensive fractional crystallization from a residual parental granitic source. Geochronologically, three types of zircons have been identified in the YK samples. The first group consists of xenocrystic zircons with &lt;sup&gt;206&lt;/sup&gt;Pb/&lt;sup&gt;238&lt;/sup&gt;U ages ranging from 3619.4 ± 61.97 Ma to 339.6 ± 7.8 Ma, characterized by anhedral-subhedral crystal morphologies. These zircons exhibit oscillatory zoning in their inherited cores and are surrounded by overgrowth rims. The second group comprises magmatic zircons, which are observed as euhedral prismatic to subhedral circular grains with distinct oscillatory zoning, commonly surrounded by bright, thin recrystallized rims. These grains yielded concordia ages ranging from 201.6 ± 1.5 Ma to 199.1 ± 1.4 Ma, indicating the emplacement of YK pegmatites in the Late Triassic to Early Jurassic. The third group consists of younger secondary zircons, dated from overgrowth rims, with &lt;sup&gt;206&lt;/sup&gt;Pb/&lt;sup&gt;238&lt;/sup&gt;U ages ranging from 180.6 ± 3.91 Ma to 46 ± 1.09 Ma. These grains contain elevated concentrations of Nb, Ta, Ti, and P (avg. 286.2, 103.5, 105.4, and 1415 ppm, respectively) compared to the inherited and magmatic zircons. The &lt;sup&gt;176&lt;/sup&gt;Hf/&lt;sup&gt;177&lt;/sup&gt;Hf ratios (0","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106633"},"PeriodicalIF":3.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873312","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}