In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis
The Chuankou tungsten ore field is situated in the central area of the Xuefeng Uplift Belt in South China. The deposit is characterized by two types of tungsten mineralization: quartz-scheelite veins in both the Neoproterozoic Banxi Group and Devonian Yanglin’ao Formation and quartz-wolframite (sche...
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MDPI AG
2020-11-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/10/11/1007 |
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| author | Junqing Pan Tagen Dai Dexian Zhang Wenshen Li Richard C. Bayless Jianfeng Gao |
| author_facet | Junqing Pan Tagen Dai Dexian Zhang Wenshen Li Richard C. Bayless Jianfeng Gao |
| author_sort | Junqing Pan |
| collection | DOAJ |
| description | The Chuankou tungsten ore field is situated in the central area of the Xuefeng Uplift Belt in South China. The deposit is characterized by two types of tungsten mineralization: quartz-scheelite veins in both the Neoproterozoic Banxi Group and Devonian Yanglin’ao Formation and quartz-wolframite (scheelite) veins in the Chuankou granite. The host rocks of the Chuankou tungsten Deposit of South China are similar to the stratigraphic sequence of Au-Sb-W deposits in the Xuefeng Uplift Belt. It is thus an appropriate location for the study of scheelite mineralization in the belt, especially the relative contributions of surrounding rocks, magma and hydrothermal fluids. Optical Microscope-Cathodoluminescene (OM-CL) and Laser Ablation Inductively Coupled Mass Spectrometers (LA ICPMS) were used to examine scheelite textures and trace element concentrations in the Chuankou deposits. Scheelite in quartz-scheelite veins was formed over three generations. In situ LA-ICPMS trace elemental analyses of scheelite I show light rare earth element (LREE)-rich REE patterns and negative Eu anomalies, suggesting a relatively close fluid system. Significantly positive Eu anomalies of scheelite II and III indicate variable degrees of addition of meteoric water during scheelite precipitation. Therefore, ore-forming fluids of the Chuankou deposit were dominantly magma-derived, with different contributions of recycled meteoric water in the surrounding strata. |
| first_indexed | 2024-03-10T14:53:46Z |
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| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T14:53:46Z |
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| series | Minerals |
| spelling | doaj.art-4a8a5f4da3e94dd397628aac738bcbc32023-11-20T20:46:26ZengMDPI AGMinerals2075-163X2020-11-011011100710.3390/min10111007In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore GenesisJunqing Pan0Tagen Dai1Dexian Zhang2Wenshen Li3Richard C. Bayless4Jianfeng Gao5School of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaSchool of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaSchool of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaState Key Laboratory for Mineral Deposits Research, Institute of Geo-Fluids, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, ChinaSchool of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaState Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, ChinaThe Chuankou tungsten ore field is situated in the central area of the Xuefeng Uplift Belt in South China. The deposit is characterized by two types of tungsten mineralization: quartz-scheelite veins in both the Neoproterozoic Banxi Group and Devonian Yanglin’ao Formation and quartz-wolframite (scheelite) veins in the Chuankou granite. The host rocks of the Chuankou tungsten Deposit of South China are similar to the stratigraphic sequence of Au-Sb-W deposits in the Xuefeng Uplift Belt. It is thus an appropriate location for the study of scheelite mineralization in the belt, especially the relative contributions of surrounding rocks, magma and hydrothermal fluids. Optical Microscope-Cathodoluminescene (OM-CL) and Laser Ablation Inductively Coupled Mass Spectrometers (LA ICPMS) were used to examine scheelite textures and trace element concentrations in the Chuankou deposits. Scheelite in quartz-scheelite veins was formed over three generations. In situ LA-ICPMS trace elemental analyses of scheelite I show light rare earth element (LREE)-rich REE patterns and negative Eu anomalies, suggesting a relatively close fluid system. Significantly positive Eu anomalies of scheelite II and III indicate variable degrees of addition of meteoric water during scheelite precipitation. Therefore, ore-forming fluids of the Chuankou deposit were dominantly magma-derived, with different contributions of recycled meteoric water in the surrounding strata.https://www.mdpi.com/2075-163X/10/11/1007scheelitetrace element chemistryREE patternsOM-CLLA ICPMS |
| spellingShingle | Junqing Pan Tagen Dai Dexian Zhang Wenshen Li Richard C. Bayless Jianfeng Gao In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis Minerals scheelite trace element chemistry REE patterns OM-CL LA ICPMS |
| title | In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis |
| title_full | In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis |
| title_fullStr | In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis |
| title_full_unstemmed | In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis |
| title_short | In Situ Trace Elemental Analyses of Scheelite from the Chuankou Deposit, South China: Implications for Ore Genesis |
| title_sort | in situ trace elemental analyses of scheelite from the chuankou deposit south china implications for ore genesis |
| topic | scheelite trace element chemistry REE patterns OM-CL LA ICPMS |
| url | https://www.mdpi.com/2075-163X/10/11/1007 |
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