Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China
The Sanbao Mn–Ag (Zn-Pb) deposit located in the Laojunshan ore district is one of the most important deposits that has produced most Ag and Mn metals in southeastern Yunnan Province, China. Few studies are available concerning the distribution and mineralization of Ag, restricting further resource e...
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MDPI AG
2020-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/10/8/650 |
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| author | Shengjiang Du Hanjie Wen Shirong Liu Chaojian Qin Yongfeng Yan Guangshu Yang Pengyu Feng |
| author_facet | Shengjiang Du Hanjie Wen Shirong Liu Chaojian Qin Yongfeng Yan Guangshu Yang Pengyu Feng |
| author_sort | Shengjiang Du |
| collection | DOAJ |
| description | The Sanbao Mn–Ag (Zn-Pb) deposit located in the Laojunshan ore district is one of the most important deposits that has produced most Ag and Mn metals in southeastern Yunnan Province, China. Few studies are available concerning the distribution and mineralization of Ag, restricting further resource exploration. In this study, detailed mineralogy, chronology, and geochemistry are examined with the aim of revealing Ag occurrence and its associated primary base-metal and supergene mineralization. Results show that manganite and romanèchite are the major Ag-bearing minerals. Cassiterite from the Mn–Ag ores yielded a U–Pb age of 436 ± 17 Ma, consistent with the Caledonian age of the Nanwenhe granitic pluton. Combined with other geochemical proxies (Zn-Pb-Cu-Sn), the Sanbao Mn–Ag deposit may originally be of magmatic hydrothermal origin, rather than sedimentary. The Ag-rich (Zn-Pb (Sn)-bearing) ore-forming fluids generated during the intrusion of the granite flowed through fractures and overprinted the earlier Mn mineralization. Secondary Ag (and possibly other base-metals) enrichment occurred through later supergene weathering and oxidation. |
| first_indexed | 2024-03-10T18:17:25Z |
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| id | doaj.art-e57d593d12524de58dc311e4b48329b6 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T18:17:25Z |
| publishDate | 2020-07-01 |
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| record_format | Article |
| series | Minerals |
| spelling | doaj.art-e57d593d12524de58dc311e4b48329b62023-11-20T07:38:37ZengMDPI AGMinerals2075-163X2020-07-0110865010.3390/min10080650Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, ChinaShengjiang Du0Hanjie Wen1Shirong Liu2Chaojian Qin3Yongfeng Yan4Guangshu Yang5Pengyu Feng6State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, ChinaState Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, ChinaState Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, ChinaState Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, ChinaKunming University of Science and Technology, Kunming 650093, ChinaKunming University of Science and Technology, Kunming 650093, ChinaKunming University of Science and Technology, Kunming 650093, ChinaThe Sanbao Mn–Ag (Zn-Pb) deposit located in the Laojunshan ore district is one of the most important deposits that has produced most Ag and Mn metals in southeastern Yunnan Province, China. Few studies are available concerning the distribution and mineralization of Ag, restricting further resource exploration. In this study, detailed mineralogy, chronology, and geochemistry are examined with the aim of revealing Ag occurrence and its associated primary base-metal and supergene mineralization. Results show that manganite and romanèchite are the major Ag-bearing minerals. Cassiterite from the Mn–Ag ores yielded a U–Pb age of 436 ± 17 Ma, consistent with the Caledonian age of the Nanwenhe granitic pluton. Combined with other geochemical proxies (Zn-Pb-Cu-Sn), the Sanbao Mn–Ag deposit may originally be of magmatic hydrothermal origin, rather than sedimentary. The Ag-rich (Zn-Pb (Sn)-bearing) ore-forming fluids generated during the intrusion of the granite flowed through fractures and overprinted the earlier Mn mineralization. Secondary Ag (and possibly other base-metals) enrichment occurred through later supergene weathering and oxidation.https://www.mdpi.com/2075-163X/10/8/650the Sanbao Mn–Ag depositmanganiteromanèchiterhodochrositeCaledonian granitic plutonChina |
| spellingShingle | Shengjiang Du Hanjie Wen Shirong Liu Chaojian Qin Yongfeng Yan Guangshu Yang Pengyu Feng Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China Minerals the Sanbao Mn–Ag deposit manganite romanèchite rhodochrosite Caledonian granitic pluton China |
| title | Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China |
| title_full | Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China |
| title_fullStr | Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China |
| title_full_unstemmed | Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China |
| title_short | Mineralogy and Metallogenesis of the Sanbao Mn–Ag (Zn-Pb) Deposit in the Laojunshan Ore District, SE Yunnan Province, China |
| title_sort | mineralogy and metallogenesis of the sanbao mn ag zn pb deposit in the laojunshan ore district se yunnan province china |
| topic | the Sanbao Mn–Ag deposit manganite romanèchite rhodochrosite Caledonian granitic pluton China |
| url | https://www.mdpi.com/2075-163X/10/8/650 |
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