{"title":"桂东梧桐矿床晚白垩世W-Cu-Zn-Pb-Ag矿化与隐伏二长花岗岩","authors":"Li-Juan Hu , Chang-Hao Xiao , Yan-Wen Tang , Rong-Qing Zhang , Ping-Ping Yu , Shi-Yu Shan , Yu Zhang","doi":"10.1016/j.oregeorev.2025.106761","DOIUrl":null,"url":null,"abstract":"<div><div>The temporal and genetic relationships among distal base metal deposits, proximal W-Sn-Cu deposits, and concealed felsic intrusion in South China remain ambiguous, with persistent uncertainties regarding whether these diverse mineralization types originated from unified magmatic-hydrothermal system or discrete events. The Wutong tungsten-bearing Pb-Zn-Ag deposit in eastern Guangxi, South China, is renowned for producing <em>gem</em>-quality rhodochrosite and serves as a magmatic-hydrothermal system genetically associated with concealed porphyritic monzogranite. Detailed ore microscopy, <em>μ</em>-XRF-EDS analysis on polished thin sections and slabs, backscattered electron (BSE) and cathodoluminescence (CL) of hübnerite unequivocally reveal a three-stage paragenetic sequence: (i) disseminated scheelite within altered sandstone and tabular hübnerite-pyrite-quartz veins; (ii) needle-like hübnerite intergrown with sphalerite-pyrite-chalcopyrite-galena assemblages accompanied by pink rhodochrosite, purple fluorite, and quartz; and (iii) silver-enriched base metal carbonate veins containing strong pink or red-rich rhodochrosite crosscutting the former veins. LA-ICP-MS zircon U-Pb dating first defines the age of the Wutong concealed monzogranite at 93.64 ± 0.27 Ma (2σ, MSWD = 0.67). Zircon ε<sub>Hf</sub>(<em>t</em>) values (−8.1 to −11.5) correspond to Paleoproterozoic crustal model ages (T<sub>DMC</sub> = 1886–1676 Ma), indicating that the Wutong monzogranite derived from the partial melting of Paleoproterozoic crust. LA-ICP-MS hübnerite U-Pb dating (95.5 ± 1.9 Ma, 2σ, MSWD = 3.1) and complementary LA-SF-ICP-MS rhodochrosite U-Pb analysis (91.9 ± 5.1 Ma, MSWD = 0.8) delineate W-Mn polymetallic mineralization within a narrow Late Cretaceous timeframe (<3 Myr duration), irrefutably establishing genetic links between magmatism and mineralization. The identification of Late Cretaceous felsic intrusion and associated W-Cu-Zn-Pb-Ag mineralization in eastern Dayaoshan district further highlights the region’s exploration potential for analogous mineralization. Integrating our new high-precise geochronological data with previous studies conclusively aligns the Nanling’s Late Cretaceous W–Sn-base metal mineralization with coeval Eurasian continental margin metallogenic belts. The Wutong deposit enhances the understanding of Late Cretaceous mineralization in South China which providing insights for identifying analogous deposits in comparable magmatic-metallogenic settings.</div></div>","PeriodicalId":19644,"journal":{"name":"Ore Geology Reviews","volume":"184 ","pages":"Article 106761"},"PeriodicalIF":3.6000,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Late Cretaceous W-Cu-Zn-Pb-Ag mineralization and concealed monzogranite in the Wutong deposit, eastern Guangxi, South China\",\"authors\":\"Li-Juan Hu , Chang-Hao Xiao , Yan-Wen Tang , Rong-Qing Zhang , Ping-Ping Yu , Shi-Yu Shan , Yu Zhang\",\"doi\":\"10.1016/j.oregeorev.2025.106761\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The temporal and genetic relationships among distal base metal deposits, proximal W-Sn-Cu deposits, and concealed felsic intrusion in South China remain ambiguous, with persistent uncertainties regarding whether these diverse mineralization types originated from unified magmatic-hydrothermal system or discrete events. The Wutong tungsten-bearing Pb-Zn-Ag deposit in eastern Guangxi, South China, is renowned for producing <em>gem</em>-quality rhodochrosite and serves as a magmatic-hydrothermal system genetically associated with concealed porphyritic monzogranite. Detailed ore microscopy, <em>μ</em>-XRF-EDS analysis on polished thin sections and slabs, backscattered electron (BSE) and cathodoluminescence (CL) of hübnerite unequivocally reveal a three-stage paragenetic sequence: (i) disseminated scheelite within altered sandstone and tabular hübnerite-pyrite-quartz veins; (ii) needle-like hübnerite intergrown with sphalerite-pyrite-chalcopyrite-galena assemblages accompanied by pink rhodochrosite, purple fluorite, and quartz; and (iii) silver-enriched base metal carbonate veins containing strong pink or red-rich rhodochrosite crosscutting the former veins. LA-ICP-MS zircon U-Pb dating first defines the age of the Wutong concealed monzogranite at 93.64 ± 0.27 Ma (2σ, MSWD = 0.67). Zircon ε<sub>Hf</sub>(<em>t</em>) values (−8.1 to −11.5) correspond to Paleoproterozoic crustal model ages (T<sub>DMC</sub> = 1886–1676 Ma), indicating that the Wutong monzogranite derived from the partial melting of Paleoproterozoic crust. LA-ICP-MS hübnerite U-Pb dating (95.5 ± 1.9 Ma, 2σ, MSWD = 3.1) and complementary LA-SF-ICP-MS rhodochrosite U-Pb analysis (91.9 ± 5.1 Ma, MSWD = 0.8) delineate W-Mn polymetallic mineralization within a narrow Late Cretaceous timeframe (<3 Myr duration), irrefutably establishing genetic links between magmatism and mineralization. The identification of Late Cretaceous felsic intrusion and associated W-Cu-Zn-Pb-Ag mineralization in eastern Dayaoshan district further highlights the region’s exploration potential for analogous mineralization. Integrating our new high-precise geochronological data with previous studies conclusively aligns the Nanling’s Late Cretaceous W–Sn-base metal mineralization with coeval Eurasian continental margin metallogenic belts. The Wutong deposit enhances the understanding of Late Cretaceous mineralization in South China which providing insights for identifying analogous deposits in comparable magmatic-metallogenic settings.</div></div>\",\"PeriodicalId\":19644,\"journal\":{\"name\":\"Ore Geology Reviews\",\"volume\":\"184 \",\"pages\":\"Article 106761\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-07-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ore Geology Reviews\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S016913682500321X\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ore Geology Reviews","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016913682500321X","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOLOGY","Score":null,"Total":0}
Late Cretaceous W-Cu-Zn-Pb-Ag mineralization and concealed monzogranite in the Wutong deposit, eastern Guangxi, South China
The temporal and genetic relationships among distal base metal deposits, proximal W-Sn-Cu deposits, and concealed felsic intrusion in South China remain ambiguous, with persistent uncertainties regarding whether these diverse mineralization types originated from unified magmatic-hydrothermal system or discrete events. The Wutong tungsten-bearing Pb-Zn-Ag deposit in eastern Guangxi, South China, is renowned for producing gem-quality rhodochrosite and serves as a magmatic-hydrothermal system genetically associated with concealed porphyritic monzogranite. Detailed ore microscopy, μ-XRF-EDS analysis on polished thin sections and slabs, backscattered electron (BSE) and cathodoluminescence (CL) of hübnerite unequivocally reveal a three-stage paragenetic sequence: (i) disseminated scheelite within altered sandstone and tabular hübnerite-pyrite-quartz veins; (ii) needle-like hübnerite intergrown with sphalerite-pyrite-chalcopyrite-galena assemblages accompanied by pink rhodochrosite, purple fluorite, and quartz; and (iii) silver-enriched base metal carbonate veins containing strong pink or red-rich rhodochrosite crosscutting the former veins. LA-ICP-MS zircon U-Pb dating first defines the age of the Wutong concealed monzogranite at 93.64 ± 0.27 Ma (2σ, MSWD = 0.67). Zircon εHf(t) values (−8.1 to −11.5) correspond to Paleoproterozoic crustal model ages (TDMC = 1886–1676 Ma), indicating that the Wutong monzogranite derived from the partial melting of Paleoproterozoic crust. LA-ICP-MS hübnerite U-Pb dating (95.5 ± 1.9 Ma, 2σ, MSWD = 3.1) and complementary LA-SF-ICP-MS rhodochrosite U-Pb analysis (91.9 ± 5.1 Ma, MSWD = 0.8) delineate W-Mn polymetallic mineralization within a narrow Late Cretaceous timeframe (<3 Myr duration), irrefutably establishing genetic links between magmatism and mineralization. The identification of Late Cretaceous felsic intrusion and associated W-Cu-Zn-Pb-Ag mineralization in eastern Dayaoshan district further highlights the region’s exploration potential for analogous mineralization. Integrating our new high-precise geochronological data with previous studies conclusively aligns the Nanling’s Late Cretaceous W–Sn-base metal mineralization with coeval Eurasian continental margin metallogenic belts. The Wutong deposit enhances the understanding of Late Cretaceous mineralization in South China which providing insights for identifying analogous deposits in comparable magmatic-metallogenic settings.
期刊介绍:
Ore Geology Reviews aims to familiarize all earth scientists with recent advances in a number of interconnected disciplines related to the study of, and search for, ore deposits. The reviews range from brief to longer contributions, but the journal preferentially publishes manuscripts that fill the niche between the commonly shorter journal articles and the comprehensive book coverages, and thus has a special appeal to many authors and readers.