Ore Geology Reviews最新文献

{"title":"Pegmatite evolution and mineralization: insights from tourmaline geochemistry and boron isotopes","authors":"Liu Xuemin ,&nbsp;Wu Xu ,&nbsp;Yang Yuanliang ,&nbsp;Yue Dabin ,&nbsp;Liao Xingjian ,&nbsp;Zhao Pufeng ,&nbsp;Wang Guozhi ,&nbsp;Liu Bingli","doi":"10.1016/j.oregeorev.2026.107156","DOIUrl":"10.1016/j.oregeorev.2026.107156","url":null,"abstract":"<div><div>While the magmatic source and evolution significantly influence rare metal mineralization in pegmatites, a critical unresolved question remains: within the same mining district, some spatially close pegmatites are mineralized while others are not. This highlights the existence of other crucial factors governing pegmatite mineralization. Tourmaline, a common borosilicate mineral in pegmatite systems, serves as a key indicator for deciphering mineralization processes. We studied the tourmaline from the Murong Li deposit (Asia’s largest single-vein Li deposit) using geochemistry, boron isotopes, and mineralogy. Three types were identified: BP-Tur (tourmaline in barren pegmatite), FP-Tur (tourmaline in fertile pegmatite), and AC-Tur (tourmaline in altered country rock). BP-Tur and FP-Tur exhibit pronounced zoning textures, indicating magmatic-hydrothermal formation. BP-Tur crystallized in a low-salinity, high-ƒO₂, fluid-rich setting. In contrast, FP-Tur formed under initially low ƒO₂ and low salinity, with both parameters increasing during later crystallization. AC-Tur is fine-grained, non-zoned and formed in a low-temperature, high-pressure, high-salinity, and high-ƒO₂ environment. Its heavier δ¹¹B values stem from ¹¹B-enriched magmatic fluids. Systematic boron isotope variations across growth zones in BP-Tur and FP-Tur record magmatic evolution under open and closed conditions, respectively. This interpretation is corroborated by higher estimated pressures for FP-Tur relative to BP-Tur, consistent with fluid loss and pressure decrease in open systems. Unlike previous studies, we find no direct correlation between the contents of Li, Sn, Nb, or Ta in tourmaline and mineralization. Instead, the closure of the magmatic system is a critical control on Li mineralization.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"190 ","pages":"Article 107156"},"PeriodicalIF":3.6,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122644","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":"In situ trace element and sulfur isotope characteristics of pyrite from the Dapingzhang Cu − Au polymetallic deposit: Insights into Au mineralization processes","authors":"Shanshan Ru ,&nbsp;Guo Li ,&nbsp;Chuandong Xue ,&nbsp;Feng Li","doi":"10.1016/j.oregeorev.2026.107154","DOIUrl":"10.1016/j.oregeorev.2026.107154","url":null,"abstract":"<div><div>The Dapingzhang Cu − Au polymetallic deposit is a large volcanogenic massive sulfide (VMS) deposit formed during the Proto − Tethyan stage in western Yunnan Province, SW China, and exhibits a stratified distribution with upper massive orebodies (V1) and lower veinlet orebodies (V2). Au − rich orebodies predominantly occur within the massive orebodies near the 16^# exploration line. This study investigates the microstructures, trace elemental, and sulfur isotopic compositions of pyrite, chalcopyrite, and sphalerite from the Au − rich orebodies at 1150 m and 1130 m levels to constrain the Au-bearing hydrothermal fluid sources, migration, and ore genesis. Four pyrite types were identified, representing three mineralization stages: (1) early-stage Py1 − 1 with sedimentary-formed strawberry − like textures; (2) late-stage Py1 − 2 formed through Py1 − 1 aggregation into irregular or euhedral crystals; and (3) Py2 (first-order zoning on Py1 − 2) and Py3 (second-order zoning on Py2). All Py1 − 2, Py2, and Py3 are hydrothermal in origin. Trace elemental composition reveals higher Sb concentrations in pyrite at the 1150 m level compared to those at the 1130 m level, with similar concentrating trends of Cu, Pb, Au, and Se. Evolutionary sequence analysis shows increasing Cu and Au concentrations but decreasing Co and Se concentrations in Py1 − 2, Py2, and Py3 across both the 1150 m and 1130 m levels. All pyrites are enriched in Au, Cu, Pb, Zn, and Sb but are depleted in Co, Ni, Tl, Se, Ti, and Sn. Sulfur isotope values (δ³⁴S =  − 2.63 to + 1.12‰) of pyrite, chalcopyrite, and sphalerite suggest a magmatic sulfur affinity. Gold mineralization is associated with E − W-trending ore-conducting faults. Au − rich fluids migrated upward through fractures, leaching Py1 − 1 to form inclusion textures and causing localized recrystallization that produced Au − enriched Py1 − 2. Continuous fluid replenishment generated Au − rich Py2. Since Py2 − forming fluids were not fully consumed, Py3 − forming fluids added more Au, reaching supersaturation and precipitating native gold and calaverite within Py2 − Py3 intergrowths and fractures. Sustained fluid supply ultimately formed the Au − rich orebodies.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"190 ","pages":"Article 107154"},"PeriodicalIF":3.6,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122645","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":"(U-Th)/He thermochronology constraints on Cenozoic exhumation of Ke’eryin lithium ore field, eastern Tibet","authors":"Jingbo Sun ,&nbsp;Wen Chen ,&nbsp;Kezhang Qin ,&nbsp;Shuangfeng Zhao ,&nbsp;Ze Shen ,&nbsp;Bin Zhang ,&nbsp;Wen Zhang","doi":"10.1016/j.oregeorev.2026.107133","DOIUrl":"10.1016/j.oregeorev.2026.107133","url":null,"abstract":"<div><div>The Ke’eryin lithium ore field, located in the east of Songpan-Ganzi orogenic belt of Tibetan Plateau, is an important lithium-producing field hosting multiple pegmatite deposits in large to super-large scale. A more complete exhumation history of this ore field is required, and favorable prospecting locations need further identification. Here, we applied (U-Th)/He dating combined with a vertical profile sampling strategy to quantitatively constrain the exhumation process of the Ke’eryin lithium ore field. Zircon (U-Th)/He (ZHe) data and thermal history modeling reveal fast cooling during ∼28–24 Ma, linked to crustal shortening during the India-Eurasia collision. This phase removed ∼3.3 km of overburden, reducing burial depths from ∼5.3 km to ∼2 km. Age-elevation relationships of apatite (U-Th)/He (AHe) combined with thermal history modeling reveal rapid cooling at ∼15 Ma. This rapid cooling episode resulted from the regional uplift and exhumation, with amplification by river incision. The hanging wall (north) experienced greater denudation than the footwall (south), making the footwall a more favorable prospecting area. Combining the zircon and apatite (U-Th)/He data, we calculate a total erosion amount of approximately ∼5 km in the Ke’eryin lithium ore field since the Late Oligocene.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107133"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078846","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":"Mg isotopes and TIMA tracing the mantle source and mineralization process at Bayan Obo Nb-REE-Fe deposit, China","authors":"Qingyan Tang ,&nbsp;Zhuoming Li ,&nbsp;Chi Zhao ,&nbsp;Yan Zhang ,&nbsp;Hailong Jin ,&nbsp;Biao Chen ,&nbsp;Yanjiang Liu ,&nbsp;Tianyu Qin ,&nbsp;Tengda Yang ,&nbsp;Min Qiao ,&nbsp;Xinrui Bai ,&nbsp;Zeyu Ma","doi":"10.1016/j.oregeorev.2026.107127","DOIUrl":"10.1016/j.oregeorev.2026.107127","url":null,"abstract":"<div><div>The presence of carbonate materials in the mantle source of carbonatites has long been debated. TIMA and Mg isotope are conducted to reveal the genesis of carbonatites and Bayan Obo Nb-REE-Fe deposit. The δ²⁶Mg values of dolomite carbonatite dykes are lighter than those of the normal mantle, ranging from −0.83 ‰ to −0.43 ‰. The δ²⁶Mg values show marked variation in both coarse-grained dolomite carbonatites (ranging from −0.71 ‰ to −0.03 ‰) and Nb-REE-Fe ores, with the latter exhibiting a broader isotopic range from −0.72 ‰ to +0.31 ‰. Fenite has a δ²⁶Mg value of −0.19 ‰, while limestones display the lowest δ²⁶Mg values overall, with a narrow range of −1.88 ‰ to −1.86 ‰. This study indicates that Bayan Obo carbonatites originated from the low-degree partial melting of carbonated peridotites. The ancient carbonate materials were introduced into the mantle source via decarbonation. Whole-rock δ²⁶Mg values are controlled by multiple mineral phases rather than a single phase. The mantle source, magmatic differentiation processes and subsequent hydrothermal fluid metasomatism collectively influence the Mg isotope compositions in the Bayan Obo area. The δ²⁶Mg values below the mantle value may result from minerals enriched in light Mg isotopes. Therefore, ancient carbonatites also involve the addition of carbonate materials. Element correlations suggest that acidic conditions favor the migration and enrichment of Nb and REE, whereas alkaline conditions promote the migration and enrichment of REE but are unfavourable for Nb migration.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107127"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078845","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 of ankerite and its relationship with uranium mineralization in the Hailijin uranium deposit, southern Songliao Basin, China","authors":"Xin Hu ,&nbsp;Hui Rong ,&nbsp;Shihu Kang ,&nbsp;Jun Ning ,&nbsp;Guolong Tang ,&nbsp;Liangliang Zhang ,&nbsp;Shusong Ma","doi":"10.1016/j.oregeorev.2026.107130","DOIUrl":"10.1016/j.oregeorev.2026.107130","url":null,"abstract":"<div><div>Ankerite cements in the Hailijin uranium deposit of the southern Songliao Basin serve as an excellent carrier for uranium mineralization. This study aims to characterize the morphology, contents, fluid inclusions, and elemental-isotopic compositions of the ankerite cements within the uranium reservoirs, and then reveals genesis of the ankerite and its relationship with uranium mineralization. In red sandstone, the ankerite is predominantly euhedral granular with an average content of 0.92 %. In yellow sandstone, it occurs as euhedral to subhedral crystals (average content: 0.62 %). In gray-white barren sandstone, it is mainly colloidal or granular, with an average content of 0.97 %. In mineralized sandstone, the ankerite exists in colloidal or granular form and has the highest average content (1.61 %). In primary gray sandstone, it appears as euhedral to subhedral crystals (average content: 0.94 %). Fluid inclusions in the ankerite yield homogenization temperatures of 140–180 °C (Th) and salinities of 8–12 wt% NaCl equiv. Sc, V, U, Zn, and Y exhibit remarkable enrichment in the ankerite, while Li, Cu, Rb, Ga, Zr, Nb, Ba, and Hf display systematic depletion patterns. The rare earth elements of ankerite generally exhibit the characteristics of light rare earth element depletion and heavy rare earth element enrichment. Ce/La ranges from 1.3 to 2.645, with an average value of 1.816, and Eu anomaly value (δEu) fluctuates between 0.881 and 1.093, with an average of 1.014. ⁸⁷Sr/⁸⁶Sr values of the ankerite range from 0.70598 to 0.70779, with an average value of 0.70748. The study indicates that the ankerite likely forms in hydrothermal fluids associated with basic dike intrusion. As temperature decreases, the ankerite and uranium minerals sequentially precipitate from these hydrothermal fluids. This study reveals the mechanism of hydrothermal fluids participating in mineralization of sandstone-hosted uranium deposits.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107130"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078841","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":"Orogenic gold mineralization constrained by sphalerite geochemistry: evidence from the Bangbu deposit, Tibet, SW China","authors":"Xiangfa Song ,&nbsp;Degao Zhai ,&nbsp;Xiaolin Wang ,&nbsp;Jinchao Wu ,&nbsp;Zhi Zhang ,&nbsp;Wei Chen ,&nbsp;Zijun Qiu ,&nbsp;Qingqing Zhao ,&nbsp;Jiajun Liu","doi":"10.1016/j.oregeorev.2026.107141","DOIUrl":"10.1016/j.oregeorev.2026.107141","url":null,"abstract":"<div><div>Located in the eastern segment of the Yarlung–Tsangpo suture zone (YTSZ), the Bangbu deposit formed during the subduction–collision evolution of the Himalayan–Tibetan orogen and constitutes a significant example of hydrothermal gold mineralization in this tectonic setting. Pyrite has commonly been employed to trace ore-forming processes in orogenic gold systems, but the role of coexisting sphalerite as an additional tracer mineral remains insufficiently investigated. This study presents a comprehensive geochemical characterization of sphalerite occurring with ore-stage pyrite in quartz–sulfide veins from the Bangbu deposit, and places these results in the context of a global dataset covering sphalerite from diverse mineralization environments. Compared with sphalerite from other deposit types, the Bangbu sphalerite is characterized by elevated Cd but depleted Ga, Mn and Sn. Both PLS-DA and its orthogonal variant (OPLS-DA) show that sphalerite from Bangbu represents a distinct geochemical cluster that is readily separable from typical magmatic–hydrothermal systems. Application of the GGIMFis geothermometer to the Bangbu sphalerite yields temperatures of 230–260 °C (peak at ∼250 °C), while the corresponding lg<em>f</em>S₂ values of –14.5 to –12.4 point to intermediate- to low-sulfidation conditions. These parameters are consistent with medium to low temperature, low salinity, CO₂-rich fluids and show no clear evidence for a significant magmatic or mantle-derived fluid component, and instead pointing to a predominantly metamorphic fluid origin. Coexisting sphalerite and pyrite display narrowly distributed <em>δ</em>³⁴S values of ∼+2‰ and near-equilibrium isotopic fractionation, and their sulfur isotope compositions are lighter than those of sulfides in the surrounding low-grade metamorphic strata. This discrepancy with a simple metamorphic devolatilization model, together with the observation that <em>δ</em>³⁴S values fall within the range expected for sulfur released by slab-derived fluids, supports a significant sub-crustal fluid contribution and indicates that a single metamorphic devolatilization model cannot fully explain the gold mineralization. Integrating constraints from trace element compositions, temperature estimates, sulfur fugacity and sulfur isotopes, this study proposes a two-stage genetic model for the Bangbu deposit, including subduction-related devolatilization pre-enrichment and metamorphic reactivation. The results demonstrate that ore-stage sphalerite provides independent constraints on the ore-forming conditions and fluid sources of orogenic gold deposits, and represents an important complement to traditional pyrite-based tracer systems.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107141"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079447","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":"Review of the relationship between highly fractionated intrusions and gold mineralization","authors":"Qingxuan Wang ,&nbsp;Shuo Wang ,&nbsp;Zhengping Yan ,&nbsp;Wenyuan Li ,&nbsp;Yunhua Liu ,&nbsp;Huali Guo ,&nbsp;Jinhua Du ,&nbsp;Yingxing Huang ,&nbsp;Tianhong Gao ,&nbsp;Zihe Chen","doi":"10.1016/j.oregeorev.2026.107145","DOIUrl":"10.1016/j.oregeorev.2026.107145","url":null,"abstract":"<div><div>Highly fractionated intrusions plays a key role in the formation of numerous types of ore metal deposits. For example, many large-scale Au deposits are associated with highly fractionated intermediate–silicic intrusions. Since the introduction of Au deposit classification types such as intrusion-related, magmatic, and magmatic–hydrothermal Au deposits, an increasing number of studies have focused on the coupled relationships between magmatic processes (e.g., melt segregation, differentiation, and evolution) and Au mineralization. The magmatism not only provides the energy and ore-forming materials for Au mineralization, but also leads to significant Au enrichment by magmatic fractionation and evolution. Consequently, studies on magmatic fractionation-related mineralization should not be confined to ore types such as W–Sn and rare metals. This paper systematically reviews the nature of Au deposits genetically linked to highly fractionated magmas and discusses the key controls on anomalous Au enrichment during magmatic fractionation. The gold-mineralizing magmas are derived mainly from regions near the crust–mantle boundary. Metasomatic overprinting of the lithospheric mantle and enrichment of the lower crust by metallic elements, fluids, and volatiles from subducted slabs are preconditions for subsequent auriferous mineralization processes. The parental rocks of these Au deposits generally have a high O fugacity and are fractionated I-type or magnetite-series granites that have an affinity with the high-K calc-alkaline series, in which physicochemical parameters such as the O fugacity regulate the S speciation in the magmas and Au distribution. Furthermore, the timing of Au-bearing metallic sulfide saturation in the magmas and subsequent exsolution into the fluid phase is one of the critical controls on Au transportation into the shallow crust and its subsequent deposition in economically viable concentrations. Such Au deposits form mainly in transitional tectonic settings associated with slab subduction (e.g., slab rollback, break off) or during the transition from collisional to post-collisional tectonic settings. The physicochemical processes that govern melt segregation, differentiation, and Au enrichment from the magma source regions to final ore deposition have significant implications for understanding anomalous Au concentration mechanisms. The interrelationships among physicochemical parameters are the critical factor in understanding the coupling relationship between the melt-fluid evolution and Au mineralization, and therefore warrant further investigation.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107145"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078857","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":"Geochemical and geochronological constraints on granitoids from the Chambishi-Nkana Basin, Zambian Copperbelt","authors":"Hu Qiaofan ,&nbsp;Mo Jiangping ,&nbsp;Wei Zhiwei ,&nbsp;Qiu ZhengJie ,&nbsp;Fang Ke ,&nbsp;Zhou Shouyu ,&nbsp;Huang Xueqiang ,&nbsp;Liu Yaohui ,&nbsp;Liu Wei ,&nbsp;Li Jiacai ,&nbsp;Wang Ailin","doi":"10.1016/j.oregeorev.2026.107139","DOIUrl":"10.1016/j.oregeorev.2026.107139","url":null,"abstract":"<div><div>This study focuses on the granitic intrusions in the Chambishi-Nkana Basin of the Zambian Copperbelt, aiming to reveal their genesis, tectonic setting, emplacement age, and relationship with Cu-Co mineralization. LA-ICP-MS zircon U-Pb dating shows that the Chambishi granite formed at approximately 1951 Ma, and the Nchanga granite crystallized at approximately 890 Ma. Geochemical analyses indicate that these rocks are peraluminous S-type granites, characterized by high A/CNK values (&gt;1.3), enrichment in light rare earth elements, and significant negative Eu anomalies (Eu/Eu*=21.38–38.28). Zircon Lu-Hf isotopic data suggest that the Chambishi granite originated from the mixing of mantle and crust-derived melts during the collision between the Bangweulu Block and the Tanzania Craton, while the Nchanga granite formed from crustal anatexis without significant mantle input in an intraplate rift environment associated with the breakup of Rodinia in the Neoproterozoic. Molybdenite Re-Os dating reveals that<!--> <!-->hydrothermal cross-cutting vein-type Cu-Mo mineralization<!--> <!-->occurred at approximately 496 Ma, coinciding with basin inversion during the late stage of the Lufilian collisional orogeny—this age only represents the timing of the late vein-type mineralization, not the entire mineralization history of the deposit. This study confirms that the late Lufilian orogeny provided tectonic channels for hydrothermal migration, and granitic intrusions provided favorable structural channels for hydrothermal migration, while tectonic-thermal effects of the late Lufilian orogeny supplied the necessary thermal driving force, jointly controlling the formation of hydrothermal cross-cutting vein-type Cu-Mo mineralization. The sedimentary layered Cu-Co mineralization is controlled by the Neoproterozoic sedimentary environment, and its specific formation age requires further dating of sulfides (e.g., carrollite) in the layered mineralization. By integrating geochronological and geochemical data, this research establishes a temporal framework for magmatic events, tectonic evolution, and mineralization in the Zambian Copperbelt, highlighting the critical control of regional tectonic-magmatic activities on Cu-Co mineralization.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107139"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078858","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":"Advanced SOTEM survey for the exploration of low-sulphidation epithermal gold: Insights from Lvyuan, eastern Junggar, China","authors":"Weiying Chen ,&nbsp;Xiaoyin Ma ,&nbsp;Quanhui Guo ,&nbsp;Pengfei Lv","doi":"10.1016/j.oregeorev.2026.107140","DOIUrl":"10.1016/j.oregeorev.2026.107140","url":null,"abstract":"<div><div>The investigation of low-sulfidation epithermal gold deposits presents significant challenges due to their intricate geological frameworks and frequently obscured mineralization. This research details the implementation of the short-offset transient electromagnetic method (SOTEM) to concurrently invert resistivity and chargeability parameters within the Lvyuan Gold Deposit located in Eastern Junggar, China. Utilizing a grounded-wire source alongside dual-base-frequency transmission, high-fidelity electromagnetic data were collected across ten survey lines encompassing the No. 7 alteration zone. One-dimensional inversion of the transient electromagnetic responses elucidated detailed subsurface electrical structures to depths of approximately one kilometer, facilitating the identification of fault systems and alteration zones linked to gold mineralization. Measurements of rock physical properties substantiated that elevated chargeability values (&gt;20%) combined with moderate to low resistivity (&lt;300 Ω·m) are strongly indicative of hydrothermally altered lithologies, particularly those exhibiting pyritization and limonitization. Integration of these geophysical results with drilling data confirmed that mineralized bodies predominantly occur within shallow zones characterized by low resistivity and high chargeability proximal to fault structures. Consequently, four prospective target areas were delineated, underscoring the effectiveness of SOTEM in delineating alteration zones and informing subsequent exploration efforts for epithermal gold deposits.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107140"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078843","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":"Formation of the Zarshuran gold deposit in northwest Iran resulted from the mixing of fertile magmatic fluids with basinal brines: Evidence from sulfide trace elements and sulfur isotopes","authors":"Shu Yang ,&nbsp;Hongrui Zhang ,&nbsp;Zhiming Yang ,&nbsp;Pinghua Liu ,&nbsp;Mehraj Aghazadeh ,&nbsp;Zengqian Hou ,&nbsp;Tiannan Yang ,&nbsp;Zahra Badrzadeh","doi":"10.1016/j.oregeorev.2026.107126","DOIUrl":"10.1016/j.oregeorev.2026.107126","url":null,"abstract":"<div><div>Zarshuran is the largest gold deposit in the Middle East. However, the sources of ore-forming materials at Zarshuran remain poorly understood. This study presents detailed descriptions of paragenetic sequence, in situ calcite U-Pb data, sulfide trace elements and sulfur isotope data to trace the sources of ore-forming materials and track the ore-forming processes. Calcite U-Pb results suggest the gold mineralization occurred during ca. 21–12.0 Ma. Five stages of mineralization can be divided at Zarshuran. They are characterized by pyrite grains with different textures. LA-ICP-MS analyses of the different types of pyrite demonstrate that Au is enriched in ore-stage Ⅰ, ore-stage Ⅱ, and late-ore stage. LA-ICP-MS analyses of the different types of sphalerite show an increasing trend for In and Sn contents but a decreasing trend for Ge and Tl contents from Sp1a to Sp1c. The S isotope compositions of sulfides from different stages yield positive values, suggesting these sulfides were precipitated by thermochemical sulfate reduction. Most δ³⁴S values of sulfide minerals of the ore-stages are in the ranges between magmatic sulfur and redbeds sulfates sulfur, suggesting contributions of magmatic and basinal materials during mineralization. The shift of δ³⁴S values during late-ore stage indicates the addition of Miocene seawater sulfates sulfur. We propose the Zarshuran gold mineralization was formed by mixing of magmatic fluids with basinal brines during the exhumation of the Iman Khan metamorphic core complex (MCC). The development of MCC and coeval fertile magmatism and basinal brine flow are important for exploration of Zarshuran-type gold ores.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"189 ","pages":"Article 107126"},"PeriodicalIF":3.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078933","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}