Ore Geology Reviews最新文献

{"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}

{"title":"The multi-stage mineralization and uplift of the Li-Be metal ore belt on the northern margin of Qaidam basin in Qinghai province","authors":"Li Yang ,&nbsp;Wanming Yuan ,&nbsp;Jing Yang ,&nbsp;Zhidan Zhao ,&nbsp;Zhenju Zhou ,&nbsp;Mingming Zhao","doi":"10.1016/j.oregeorev.2025.106630","DOIUrl":"10.1016/j.oregeorev.2025.106630","url":null,"abstract":"<div><div>This study investigates the zircon and apatite fission track data from the Chakabeishan region, focusing on lithium-beryllium and niobium-tantalum-lithium deposits. The zircon fission track results suggest that the age group of 170–159 Ma represents the peak of lithium mineralization, while the 153–137 Ma group is related to the hydrothermal stage of pegmatites. The 127–106 Ma group marks the end of hydrothermal evolution, and cooling events in the Late Cretaceous (100–94 Ma and 87–72 Ma) are associated with subsequent metallogenic events. Thermal history simulations of apatite fission tracks reveal four exhumation stages: 160–140 Ma (0.86 km), 140–50 Ma (0.57 km), 50–15 Ma (0.43 km), and 15 Ma to present (1.43 km), with a total exhumation thickness of 3.29 km. The study also shows that the rare metal metallogenic thermal events in the Chakabeishan are coupled with those in the northern Qinghai-Tibet Plateau, particularly during the Late Cretaceous to Eocene (100–41 Ma). This coupling reflects widespread thermal effects caused by regional tectonic movements and collisions, providing key insights into the timing and genesis of rare metal mineralization. The findings highlight the importance of zircon and apatite fission track methods in determining the metallogenic age of pegmatite deposits.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106630"},"PeriodicalIF":3.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883017","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":"Multi-stage evolution of a gold mineralization from southern China: Implications for the ore-forming processes","authors":"Yayun Liang ,&nbsp;Wenhao Xue ,&nbsp;Long Li ,&nbsp;Christoph Beier ,&nbsp;Hongsheng He ,&nbsp;Jincheng Xiao ,&nbsp;Jun Deng","doi":"10.1016/j.oregeorev.2025.106618","DOIUrl":"10.1016/j.oregeorev.2025.106618","url":null,"abstract":"<div><div>The Jinshan gold deposit is hosted in the Neoproterozoic metasedimentary rocks in the central part of the Jiangnan Orogen in southern China. Multiple generations of arsenopyrite and pyrite were formed: Stage 1 arsenopyrite- pyrrhotite, Stage 2 quartz–arsenopyrite–gold and Stage 3 quartz–carbonate–pyrite. Here, we present <em>in situ</em> major element, trace element, trace element mapping, and <em>in situ</em> sulfur isotope analyses of sulfides. Gold enrichment is not dependent on As, but may be transmitted through the low melting chalcophile element (LMCE) such as Pb, Bi, Sb, Te. The ore-forming fluids of gold mineralization were likely derived from a magmatic source. We analyze the detailed enrichment process that the early fluid has low contents of Au but as a result of decreasing in temperature the ore-forming fluids; the dissolution and reprecipitation process of arsenopyrite caused by late magmatic-hydrothermal fluid with elevated Au content led to the local change of <em>f</em>o₂ in the fluid, thereby promoting the release of Au.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106618"},"PeriodicalIF":3.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873313","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":"Triassic gold-polymetallic mineralization in the middle section of the Central Asian orogenic belt: In-situ garnet U-Pb dating and composition analyzing on the garnets from Laodonggou deposit","authors":"Weidong Tang ,&nbsp;Yongbao Gao ,&nbsp;Liyong Wei ,&nbsp;Zhanlin Ge ,&nbsp;Huanhuan Wu ,&nbsp;Tianhang Liu ,&nbsp;Cheng Ma ,&nbsp;Xuepeng Duan","doi":"10.1016/j.oregeorev.2025.106617","DOIUrl":"10.1016/j.oregeorev.2025.106617","url":null,"abstract":"<div><div>The Beishan Orogenic Belt, situated in the middle section of the Central Asian Orogenic Belt (CAOB), is a key region for endogenous metal mineralization. Within this belt, the Laodonggou gold–polymetallic deposit is a representative example of such deposits. Skarn-type ore is the most important ore type, and the skarn stage represents the initial phase of enrichment and mineralization of metallic minerals, including gold and copper. Garnet, the dominant alteration mineral during the skarn stage, provides crucial insights into the physicochemical characteristics, fluid environment, and timing of the early mineralization at Laodonggou. Two generations of garnets were identified in the deposit. Garnets formed during the prograde skarn stage primarily belong to the andradite-grossular transitional series, while those formed during the retrograde skarn stage are predominantly andradite. Findings revealed that the early zoned garnets from the prograde skarn stage developed under relatively neutral, weakly oxidizing to weakly reducing conditions, with a low water–rock ratio and relatively closed fluid conditions. During the retrograde skarn stage, the fluid environment became weakly acidic and weakly oxidizing, with an open fluid system, higher water–rock ratios, and increased oxygen fugacity. Moreover, fluid metasomatism during this stage was characterized by infiltrative metasomatism, which facilitated gold enrichment and mineralization. Garnet in-situ U–Pb ages of 243.5 ± 9.1 Ma and 245.6 ± 5.3 Ma were obtained for the Laodonggou deposit for the first time, which serves as a representative example of the Triassic gold–polymetallic mineralization event in the middle section of the CAOB. During the Triassic, the middle CAOB experienced three major subduction phases, namely, 258–247 Ma, 234–230 Ma, and 222–211 Ma. Similarly, regional intermediate-felsic magmatic intrusions occurred in three phases, namely, 248–233 Ma, 225–217 Ma, and 207–209 Ma. The prolonged and intermittent subduction provided abundant deep-seated metallogenic materials, making the Triassic one of the most critical periods for metal mineralization in the region, which can be divided into two relatively concentrated phases. The period of 250–220 Ma saw the peak for gold and polymetallic mineralization, while 213–203 Ma experienced weaker gold–polymetallic mineralization, with rare metal mineralization dominating. Isotope studies of S, Pb, and C–O indicate that the metallogenic materials of the deposit originated from a mixed source, including deep-seated magmas and country rocks, with magmatic fluids playing a dominant role in the mineralization process. Based on the characteristics of rare earth elements, we conclude that the skarn, gold ore bodies, and diorite porphyrite of the deposit are products of the same magmatic-hydrothermal mineralization system. Therefore, the Laodonggou gold–polymetallic deposit is interpreted as having a magmatic origin.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106617"},"PeriodicalIF":3.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873314","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 “Wolframite solubility and precipitation in hydrothermal fluids: Insight from thermodynamic modeling” [Ore Geol. Rev. 117 (2020) 103289]","authors":"Xiangchong Liu ,&nbsp;Changhao Xiao","doi":"10.1016/j.oregeorev.2025.106637","DOIUrl":"10.1016/j.oregeorev.2025.106637","url":null,"abstract":"","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"181 ","pages":"Article 106637"},"PeriodicalIF":3.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906026","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}