Ore Geology Reviews最新文献

{"title":"Mineralogy, petrology, geochemistry and U-Pb zircon age of Upper Cretaceous bauxites from Jajce, Bosnia and Herzegovina","authors":"Šime Bilić ,&nbsp;Irena Peytcheva ,&nbsp;Stoyan Georgiev ,&nbsp;Marko Holma ,&nbsp;Atanas Hikov ,&nbsp;Ivica Pavičić ,&nbsp;Franjo Šumanovac ,&nbsp;Gordana Deljak ,&nbsp;Sergii Kurylo ,&nbsp;Marcel Guillong","doi":"10.1016/j.oregeorev.2025.106736","DOIUrl":"10.1016/j.oregeorev.2025.106736","url":null,"abstract":"<div><div>The area of Jajce in Bosnia and Herzegovina is historically one of the most important localities for<!--> <!-->bauxite production in the wider region. It has huge production and exploration potential; however, it lacks scientific data, especially in terms of<!--> <!-->mineralogy and geochemistry. Our study provides the first detailed mineralogical and geochemical, as well as U-Pb dating data from this area. Petrographic analyses revealed mostly ooidic to conglomeratic textures. Hematised black pebbles attract attention as a textural element but are also shown to be economically interesting as they have the largest concentrations of trace elements. The major Al-phase is boehmite with minor occurrences of diaspore. A variety of accessory minerals were detected, indicating multiple and diverse protolith sources, ranging from ultrabasic to acidic magmatic and metamorphic rocks. Chemical composition corresponds to ferritic bauxite with up to 61 wt% of Al₂O₃. Hematite is the primary scavenger of trace elements (REE, Sc, V, Cr, U, Th and Pb). REE content reaches up to 1353 ppm in the whole rock, primarily stored in xenotime, monazite, synchysite and parisite. Most of the REE carbonates indicate an authigenic origin, reflecting slightly alkaline and oxidative conditions. Synchysite hosts Ga and Ge, while kaolinite concentrates Li. U-Pb zircon dating yielded concordant ages ranging mainly from 84 ± 1.4 to 92.6 ± 2.1 Ma, corresponding to the Santonian to Turonian stages of the Late Cretaceous period. These ages constrain the timing of bauxitisation in the Jajce area, indicating that it must have occurred after the deposition of the youngest zircon populations (∼84 Ma). Based on the zircon crystallisation age and geochemical similarities, the source material for the Jajce bauxites likely originates from the Apuseni-Banat-Timok-Srednogorie Belt of the Carpathian-Balkan orogen. Contributions from the contemporary Sava Zone cannot be excluded, although dated volcanic activity in that region is reported to be slightly younger.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106736"},"PeriodicalIF":3.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481750","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":"Timing and hydrothermal fluid evolution of the Tenglongling gold deposit, North Tianshan, NW China","authors":"Xuguang Li ,&nbsp;Yun Zhao ,&nbsp;Chunji Xue ,&nbsp;Haixia Chu ,&nbsp;Yihao Liu ,&nbsp;Xueqin Zhang ,&nbsp;Jia Chen ,&nbsp;Qinghui Yu ,&nbsp;Yu Yan","doi":"10.1016/j.oregeorev.2025.106710","DOIUrl":"10.1016/j.oregeorev.2025.106710","url":null,"abstract":"<div><div>The Tianshan Orogenic Belt (TOB), which lies in the southwestern part of the Central Asian Orogenic Belt (CAOB), represents a significant gold ore cluster. The Tenglongling gold deposit was recently found in the Bogda-Harlik Belt in the TOB. However, the timing and mechanism of gold mineralization remain unclear. Gold orebodies in Tenglongling occurred in the Carboniferous Shiqiantan Formation and diorite dykes, controlled by regional shear zone. The hydrothermal paragenesis can be divided into (Ⅰ) quartz-pyrite stage, (II) quartz-stibnite-arsenopyrite-gold stage, and (III) quartz-stibnite stage. The age of 114 ± 1.2 Ma, determined by SIMS zircon U-Pb of the Tenglongling diorite, provides a minimum age constraint on gold mineralization. Fluid inclusions hosted by quartz suggest that the ore-forming fluids are characterized by medium temperatures, low salinities, and CO₂-CH₄-rich compositions. Coexisting LR-type and VR-type FIs with comparable homogenization temperatures (T<em>_h</em>) suggest fluid immiscibility during the hydrothermal fluid evolution. The δ¹⁸O_H2O (−3.7 ‰ to +9.2 ‰) and δD (−110 ‰ to −95 ‰) for ore-forming fluids indicate a metamorphic origin. Fluid immiscibility, accompanied by elevated pH (pH &gt; 8) and decreased LogƒS₂ (LogƒS₂ = −11 to −17), contribute to a significant reduction in gold solubilities, ultimately generate the deposition of gold. Combined with geological and geochemical characteristics, the Tenglongling deposit is classified as an orogenic-type gold deposit, providing new insights into late Mesozoic gold mineralization in the Bogda-Harlik Belt.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106710"},"PeriodicalIF":3.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534186","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":"Geochemistry, isotopes, and morphology of coarse-grained pyrite from the Jinqingding gold deposit, Jiaodong Peninsula: Implications for episodic ore-forming fluid evolution","authors":"Shi-Sheng Li ,&nbsp;Chun-Juan Zang ,&nbsp;Lin Li ,&nbsp;Sheng-Rong Li ,&nbsp;Wei Tao ,&nbsp;Xiang Cheng","doi":"10.1016/j.oregeorev.2025.106742","DOIUrl":"10.1016/j.oregeorev.2025.106742","url":null,"abstract":"<div><div>The Jinqingding gold deposit, a representative orebody in the Jiaodong gold province, hosts abundant coarse-grained pyrites that exhibit diverse morphologies, including cube (a), octahedron (o), tetragonal trisoctahedron (m), pentagonal dodecahedron (e), and combined forms (e.g., e + a). These pyrites display distinct morphological evolution with cores dominated by Pya/Pyo, mantles of Pyo/Pym, and rims dominated by Pye and Pye + a. Microstructurally, two pyrite types are identified: inclusion- and pore-rich pyrite (Pyi-j; i/j = morphology codes) and inclusion- and pore-poor pyrite (Pyi). Integrated morphological evolution, microstructural characterization, in-situ elements, and sulfur isotope analyses elucidate mineralization processes at the microscale.</div><div>Morphological evolution indicates a cooling trajectory from high to intermediate temperatures, coupled with increasing sulfur supersaturation. Trace elements (e.g., Au, Ag, Te, and Bi) are enriched in Pyi-j and formed by rapid pyrite crystallization and fluid immiscibility during pressure drops triggered by the “fault-valve” process. Gold primarily exists in the form of a solid solution (Au⁺), with enrichment processes that are controlled by Te and Bi rather than As. Sulfur isotopes (δ³⁴S: 7.8–22.2 ‰) display a core-to-rim decrease that is driven by oxidation (primary driver), Rayleigh fractionation and cooling during the “fault-valve” process. This study establishes that the “fault-valve” process governed episodic fluid pressure drops, promoting pyrite crystallization and metal deposition. The findings provide a microscale record of fluid evolution and highlight the critical roles of oxidation, temperature, and sulfur dynamics in gold mineralization.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106742"},"PeriodicalIF":3.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321717","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":"Fluid evolution and metal precipitation mechanisms in the Yulong porphyry Cu-Mo deposit, Eastern Tibet: insights from the two-stage mineralization process","authors":"Qi Chen ,&nbsp;Tingjie Yan ,&nbsp;Zezhong Du ,&nbsp;Jiaxuan Zhu ,&nbsp;Bin Du ,&nbsp;Hongyu Duan","doi":"10.1016/j.oregeorev.2025.106713","DOIUrl":"10.1016/j.oregeorev.2025.106713","url":null,"abstract":"<div><div>The Yulong porphyry Cu-Mo deposit, the largest deposit in the Eocene Yulong porphyry copper belt of eastern Tibet, China, preserves three mineralization events triggered by multiple magmatic intrusions. Despite most Cu-Mo sulfides being concentrated in the first two mineralization stages, however, the pressure–temperature conditions and metal precipitation mechanisms of those remain poorly constrained. This study integrates field observations, ore microscopy, cathodoluminescence (CL) imaging, fluid inclusion microthermometry, and coupled sulfide sulfur isotope/molybdenite Mo isotope analyses to constrain ore-forming fluids evolution during two mineralization stages. Stage I Cu-Mo mineralization was associated with high-temperature (∼400–450 °C) K-silicate alteration under lithostatic to hydrostatic transitional conditions (∼450 bar), resulting from direct Cu-Mo precipitation triggered by cooling of single-phase fluids. Stage II mineralization occurred under hydrostatic pressure (∼300 bar), where fluid phase separation into high-salinity brine and low-salinity vapor ultimately facilitated extensive Cu-Mo precipitation accompanied by moderate-temperature sericitic alteration (∼350–400 °C). Mo isotopic compositions of molybdenite reveal pronounced <em>δ</em>^98/95Mo fractionation (0.05 to 0.48 ‰) attributable to multistage fluid boiling and Rayleigh fractionation during Stage II mineralization. These findings establish that the overprinting of sericitic alteration on K-silicate alteration could serve as an indicator for high-grade mineralization zone. Systematic Mo isotopic variations in alteration halos (enriched in heavy <em>δ</em>^98/95Mo) provide a novel vectoring tool to locate mineralization centers.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106713"},"PeriodicalIF":3.2,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338805","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":"Wall-rock control on the mineral assemblage of hydrothermal veins: examples from the Mahuaping Be-W-F deposit, Yunnan, SW China","authors":"Sheng Li ,&nbsp;Rolf L. Romer ,&nbsp;Wenchang Li ,&nbsp;Fucheng Yang ,&nbsp;Qinggao Yan ,&nbsp;Huawen Cao ,&nbsp;Shenjin Guan","doi":"10.1016/j.oregeorev.2025.106728","DOIUrl":"10.1016/j.oregeorev.2025.106728","url":null,"abstract":"<div><div>The 32 Ma vein-type Mahuaping Be-W-F deposit is closely related to the folding and faulting of its host-rocks, Ordovician slates and Silurian limestones. We demonstrate that mineral assemblages in the veins are controlled by the wall-rocks and argue that fluid-rock interaction triggered mineral precipitation. Veins show two stages of mineralization. Stage I mica-quartz veins with beryl, scheelite and fluorite occur in limestone, slate, and their contact zone. Dissolution of limestone provided Ca to form scheelite and fluorite in veins in the limestones and in the contact zone. The precipitation of fluorite destabilized Be-fluoride complexes in the fluid and induced the precipitation of beryl. Alteration of slates provided Fe to produce wolframite in veins hosted in slates and in the contact zone. The composition of Stage I mica ranges from muscovite in veins in the limestones to phengite in veins in the slates. The trace element contents of Stage I mica depend on the nature of the wall rocks. Stage II mica-quartz veins are barren. Stage II veins are shielded from interaction with the wall-rocks by Stage I mineral assemblages. Therefore, the composition of Stage II muscovite and its trace-element signature are independent of the nature of the wall-rocks. The trace element inventory of Stage II mica indicates that the mineralizing fluid, which carried the ore elements Be, W, F, and Sn, is derived from low-grade sedimentary rocks rather than an unexposed intrusion.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106728"},"PeriodicalIF":3.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314237","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 geochemistry of ore-related intrusive rocks and skarn minerals of the Cishan gold deposit in the Tongling ore-cluster region, eastern China: Implications for petrogenesis and skarn mineralization","authors":"Xi-Yao Li ,&nbsp;Qing Lu ,&nbsp;Shasha Liu ,&nbsp;Sanzhong Li ,&nbsp;Liu-An Duan ,&nbsp;Jie Liu ,&nbsp;Chong Jin ,&nbsp;Yu Hong ,&nbsp;Jie Zhou","doi":"10.1016/j.oregeorev.2025.106731","DOIUrl":"10.1016/j.oregeorev.2025.106731","url":null,"abstract":"<div><div>The Tongling ore-cluster region is a major copper–gold polymetallic mining district situated within the Middle-Lower Yangtze Metallogenic Belt of eastern China. Recent explorations have identified the Cishan gold deposit as a porphyry-skarn mineralization within the Shizishan ore field in the Tongling region. This study presents a comprehensive investigation of the Cishan gold deposit, encompassing geochronological, mineralogical, geochemical, fluid inclusion, and Sr-Nd-Hf isotopic studies of metallogenetic intrusive rocks and ore-bearing skarn samples. Additionally, geological modeling informed by drill-hole and gravity data were conducted. Multi-mineral U-Pb dating indicates that skarn mineralization in the Cishan deposits occurred at 138–134 Ma, succeeding the associated magmatism (139–138 Ma). Both the pyroxene diorite and quartz monzonite exhibit metaluminous characteristics and belong to the high-K calc-alkaline-to-shoshonitic series. Pyroxene diorite samples yield similar whole-rock ε_Nd(t) values (−8.2 to −8.8) and zircon ε_Hf(t) values (−8.6 to −12.1) to those of the quartz monzonite samples (−7.2 to −7.3 and −7.7 to −15.4, respectively), suggesting a common magmatic source. Geochemical analysis indicated that the pyroxene diorite originated from an enriched lithospheric mantle source, whereas the quartz monzonite evolved from a dioritic magma chamber. Skarn formed via hydrothermal activity at magma-wallrock contacts, and fluid inclusion analysis implied earlier high to medium temperature and high-salinity fluids formed silicates, and later cooling precipitated sulfides/carbonates. During the Early Cretaceous, the lithospheric extensional setting could induce partial melting of the lithospheric mantle, which initiated by the rollback of the subducted Paleo-Pacific slab. This process led to the formation of a deep magma chamber within the lower crust via magmatic underplating. Subsequent magma differentiation within a shallower chamber culminated in the emplacement of shallow-level stock, apophysis and dike intrusions. These intrusive bodies were instrumental in the genesis of intrusive sequences and development of gold-bearing skarn deposits.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106731"},"PeriodicalIF":3.2,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321718","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":"Dating Oligocene metasomatism of skarns in Mogok metamorphic belt using in situ vesuvianite geochronology","authors":"Qian Guo ,&nbsp;Shun Guo ,&nbsp;YueHeng Yang ,&nbsp;Xu Tang ,&nbsp;QinDi Wei ,&nbsp;LiXin Gu ,&nbsp;TengFei Wu ,&nbsp;Lin Chen ,&nbsp;Kyaing Sein","doi":"10.1016/j.oregeorev.2025.106729","DOIUrl":"10.1016/j.oregeorev.2025.106729","url":null,"abstract":"<div><div>Fluid metasomatism in marbles (skarnization) is a crucial mechanism for gemstone formation and metal deposits in the Mogok metamorphic belt (MMB, Myanmar). However, the precise time for the metasomatism is unknown due to a lack of suitable mineral chronometers. In this study, we use vesuvianite U–Pb chronology and mineral chemistry to constrain the timing of fluid metasomatism in marbles and the chemical characteristics of the reactive fluids. Two representative calc-silicate rocks from the MMB, which are the metasomatized products of calcite marbles by infiltrating fluids, were chosen. The occurrence, nanoscale structure, U–Pb ages, and compositions of vesuvianite in both samples were investigated. The MMB vesuvianite occurs as both porphyroblastic and matrix minerals in the calc-silicate rocks and is texturally equilibrium with garnet, clinopyroxene, plagioclase, and other silicates, indicating the growth of vesuvianite during metasomatism. The high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) analysis reveals no U-rich nanoscale particles in the vesuvianite. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis yielded the well-defined lower intercept ages of 29.8 ± 1.8 Ma (2σ, MSWD = 2, n = 20) and 29.6 ± 2.0 Ma (2σ, MSWD = 1.5 Ma, n = 22) in the two samples. The ages are consistent with those of syenites in the MMB and thus reveal that the reactive fluids are most likely related to the syenite intrusions. The high concentrations of Th (80–2912 μg/g), U (34–1603 μg/g), and LREEs (216–735 μg/g for La) in the vesuvianite and high abundance of this mineral demonstrates that the reactive fluids transfer significant amounts of these elements into the marbles. This study indicates that the metasomatic formation of Ca-skarns in the MMB occurred in Oligocene during the India-Asia convergence. We highlight that vesuvianite is a powerful mineral that could be used for accurately determining the timing of skarn-type ores and gemstones, fluid-carbonate interaction, and orogenic CO₂ release.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106729"},"PeriodicalIF":3.2,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470739","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 genesis of the large Narenwula W polymetallic deposit, NE China: Evidence from mineral geochemistry and in-situ S isotope analyses of sulfides","authors":"Wei Xie ,&nbsp;Chao Jin ,&nbsp;Qing-Dong Zeng ,&nbsp;Ling-Li Zhou ,&nbsp;Jin-Jian Wu ,&nbsp;Rui-Liang Wang ,&nbsp;Jian Liu ,&nbsp;Wei-Jun Chen","doi":"10.1016/j.oregeorev.2025.106732","DOIUrl":"10.1016/j.oregeorev.2025.106732","url":null,"abstract":"<div><div>Sulfide geochemistry has been extensively used to elucidate ore-forming processes in diverse ore deposits, but its application in granite-related W polymetallic mineralization systems remains limited. The Narenwula deposit (89950 t WO₃ @ 0.78 %, 26,700 t Zn @ 1.23 %, 8100 t Pb @ 1.06 %, and 3100 t Cu @ 1.51 %), located in the eastern Inner Mongolia, is a large-scale quartz-vein type W polymetallic deposit in NE China. In this study, we present a detailed investigation of the deposit geology, <em>in-situ</em> S isotope, and geochemical compositions of wolframite and sulfides to constrain the genesis of the Narenwula deposit. The hydrothermal process can be divided into four stages: stage 1 is dominated by wolframite, and represents the dominant stage of W mineralization; stage 2 features the development of coexisting wolframite, pyrite, arsenopyrite, and chalcopyrite; stage 3 is the predominant stage of sulfide mineralization; and stage 4 is characterized by the occurrence of quartz, carbonate, fluorite, and minor amounts of pyrite. The δ³⁴S values of sulfides from different stages vary from 4.68 to 7.02 ‰, indicating the sulfur originated from granitic magmas. LA-ICP-MS trace element analyses reveal that two-stage wolframite displays analogical trace elements and REE_N patterns, as well as relatively constant Nb/Ta and Y/Ho ratios. Combined with consistent Co/Ni (mainly 1–10) and high As/Ni ratios (&gt; 10) of pyrite from three stages, we suggest that the multistage hydrothermal fluids originated from a common source–a highly evolved granitic magma. Wolframite, pyrite, arsenopyrite, and chalcopyrite are all important trace element carriers, but element enrichment varies markedly among these minerals: wolframite is enriched in Ti, Zr, Sc, Nb, Ta, and HREEs, pyrite in As, arsenopyrite in Sb and Te, and chalcopyrite in Zn, Cd, In, and Sn. These elements are primarily incorporated into mineral lattices as solid solutions. From early to late stage, the fluid temperature and oxygen fugacity decreased, as indicated by the systematic variations of trace element contents in wolframite and sulfides. Greisenization is genetically linked to W mineralization, whereas sericitization promotes the formation of stage 3 sulfide mineralization. Our findings highlight the significance of <em>in-situ</em> mineral geochemical analyses in revealing the origin, composition, and evolution of ore minerals in quartz-vein W polymetallic deposits, which is critical for elucidating detailed ore-forming processes of intrusion-related W polymetallic mineralization systems in NE China and globally.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106732"},"PeriodicalIF":3.2,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314165","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":"Late Indosinian extensional metallogenic events in South China: Evidence from Triassic granites of the Zhilingtou gold deposit in Zhejiang province","authors":"Hanlun Liu ,&nbsp;Jingwen Mao ,&nbsp;Xiaofei Yu ,&nbsp;Shigang Duan ,&nbsp;Yandong Sun ,&nbsp;Yingchao Wang","doi":"10.1016/j.oregeorev.2025.106738","DOIUrl":"10.1016/j.oregeorev.2025.106738","url":null,"abstract":"<div><div>The Zhilingtou gold deposit represents the sole large–scale gold deposit in Zhejiang Province, China. The gold orebodies are hosted within the Paleoproterozoic Badu Group biotite–plagioclase gneiss without penetrating the overlying Cretaceous volcanic cover. Notably, the deposit has a well–defined spatial relationship with the concealed biotite monzogranite at a depth of 400 m. Here, we report zircon U–Pb ages, geochemical and Sr–Nd–Hf isotope data for the biotite monzogranite and K–feldspar granite of the Zhilingtou area. LA–ICP–MS U–Pb zircon analyses provide weighted mean ages of 230 ± 1 Ma and 229 ± 1 Ma for the biotite monzogranite and the K–feldspar granite, respectively. Mineralogical and geochemical data regarding zircon saturation temperatures indicate that these two rock types can be classified as metaluminous to peraluminous and are categorized within the high–K calc–alkaline–shoshonite A–type granites, which are associated with an extensional tectonic environment. The biotite monzogranite exhibits lower ε_Hf(t) values and older two-stage model ages, higher ε_Nd(t) values and younger T_DM2 (Nd) ages than the K–feldspar granite. These findings suggest that both rock types likely originated from mixed sources, primarily from the partial melting of a late Paleoproterozoic basement in the lower crust. The A-type granites in the region formed in a post-collisional extensional tectonic environment, emerged after the collision of the South China, Indosinian, and North China blocks during the Triassic period. The resultant crustal extension and thinning facilitated partial melting, which was instrumental in the formation of the granites and established conducive conditions for the evolution of the gold metallogenic system.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106738"},"PeriodicalIF":3.2,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297086","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":"Metallogeny of celestite deposits in Iran; implications for future explorations","authors":"Shaghayegh Sadat Hashempour,&nbsp;Sajjad Maghfouri,&nbsp;Ebrahim Rastad","doi":"10.1016/j.oregeorev.2025.106735","DOIUrl":"10.1016/j.oregeorev.2025.106735","url":null,"abstract":"<div><div>In Iran, celestite deposits/occurrences are found in two structural zones of the (1) Central Iran zone, and (2) Zagros Folded Thrust Belt. The host rock age of the celestite deposits in the world varies from Silurian to Pliocene but in Iran this mineralization’s are specific to the Neogene carbonate-evaporite sequences, which is the (1) Oligo-Miocene Qom Formation in Central Iran zone; (2) the Oligo-Miocene Asmari Formation; and (3) the Early-Middle Miocene Gachsaran-Mishan Formations in the Zagros Folded Thrust Belt, which is known as the youngest host of celestite mineralization in Iran. The marl-carbonate members of the Oligo-Miocene Qom Formation in Central Iran zone hosts the most significant and largest celestite deposits, such as Arvaneh-Aftar, Davazdah-Emam, Siah-Kuh, Madabad, Mazraeh, Nakhjir-Kuh, Kuh-Talhe, Abardej, Kazemabad, Qaleh-Boland, Deh-Namak, Baztab, Paiiez, Pis-Kuh in Jandag area, Tapeh-Gobar, Khoushab-Rood, Zand-e-Fashafoieh, Maranjab, Gand-Aab, Huk, and Makresh deposits. Molkabad deposit in the Central Iran zone, with a reserve of 2Mt, which are typically associated with shallow marine environments is the largest and most important celestite deposit in Iran and also one of the largest celestite deposits in the world. In the Zagros Folded Thrust Belt, the most important celestite deposits located in the Asmari carbonatic Formation in the Bangestan anticline which including Tang-Ban, Tang-e-Nayab, Gonbad-Bardi, Kal-Ahmadi, Posht-Par, Dopar-Nazari, Tortab, Tarak, Gudben, Abolfares, Mokhdan, Konj-e-Konj, Takhtan, Hormuz, Doghonbadan, Abdanan, Pirmored, and Dasht-e-Ahoo deposits. The well-known deposits of Gachsaran-Mishan Formations are the Likak, and Baba-Mohammad deposits. It seems that the evaporite lithology of the Gachsaran Formation can be a suitable environment for celestite mineralization in the Zagros Folded Thrust Belt. According to the Cenozoic celestite mineralization in Iran, it can be concluded the Neo-Tethys oceanic cycle and the geodynamic evolution of the related sedimentary basins played a role in the formation of these deposits. The largest celestite deposits formed during diagenetic replacements and open-space filling processes in coastal carbonate- evaporite sequences. Shallow epicontinental basins are the main geological environment for celestite deposits. Qom back-arc environment and Zagros foreland basin are the main depositional environments for celestite mineralization’s. Saline Sr-rich fluids, shallow depositional environment, regression of sea water, karst-dolomitization process, and semi-arid climate are among the most important factors controlling Iranian celestite deposits. Understanding of the temporal-spatial distribution of celestite deposits in Iran provides valuable insights for exploration and exploitation efforts.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106735"},"PeriodicalIF":3.2,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314164","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}