LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China
Among the marble-hosted ruby deposits in the Himalayan tectonic belt, which yields the highest-quality rubies in the world, the Yuanjiang deposit is the only economically viable one located in China. More attempts are necessary to put constraints on the ore-forming age of these marble-hosted ruby de...
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MDPI AG
2021-04-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/4/433 |
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| author | Tianjian Yang Xiaoming Sun Guiyong Shi Ying Liu |
| author_facet | Tianjian Yang Xiaoming Sun Guiyong Shi Ying Liu |
| author_sort | Tianjian Yang |
| collection | DOAJ |
| description | Among the marble-hosted ruby deposits in the Himalayan tectonic belt, which yields the highest-quality rubies in the world, the Yuanjiang deposit is the only economically viable one located in China. More attempts are necessary to put constraints on the ore-forming age of these marble-hosted ruby deposits. Here, we dated rutile inclusions in the Yuanjiang rubies using the LA-ICP-MS U–Pb method, which yielded a lower intercept <sup>206</sup>Pb/<sup>238</sup>U age of 20.2 ± 1.2 Ma on the Tera-Wasserburg plot, close to the 22.5–22.2 Ma <sup>40</sup>Ar/<sup>39</sup>Ar ages of phlogopite from the ruby host matrix assemblage. Our U–Pb rutile age put a constraint on the cooling history of the Yuanjiang rubies deposit. The new rutile age is consistent with our previous model that shows the ca. 28–22 Ma left lateral shearing plays an important role in transporting the ruby deposit toward the surface. This study provides the first example of in-situ U–Pb dating of rutile in the Himalayan tectonic belt, demonstrating the great potential of U–Pb rutile geochronology for Cenozoic mineral deposits. |
| first_indexed | 2024-03-10T12:10:54Z |
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| id | doaj.art-bcb3d7663e774f59a68fe3db6b66e90a |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T12:10:54Z |
| publishDate | 2021-04-01 |
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| spelling | doaj.art-bcb3d7663e774f59a68fe3db6b66e90a2023-11-21T16:15:10ZengMDPI AGMinerals2075-163X2021-04-0111443310.3390/min11040433LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest ChinaTianjian Yang0Xiaoming Sun1Guiyong Shi2Ying Liu3School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaGuangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, ChinaGuangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, ChinaAmong the marble-hosted ruby deposits in the Himalayan tectonic belt, which yields the highest-quality rubies in the world, the Yuanjiang deposit is the only economically viable one located in China. More attempts are necessary to put constraints on the ore-forming age of these marble-hosted ruby deposits. Here, we dated rutile inclusions in the Yuanjiang rubies using the LA-ICP-MS U–Pb method, which yielded a lower intercept <sup>206</sup>Pb/<sup>238</sup>U age of 20.2 ± 1.2 Ma on the Tera-Wasserburg plot, close to the 22.5–22.2 Ma <sup>40</sup>Ar/<sup>39</sup>Ar ages of phlogopite from the ruby host matrix assemblage. Our U–Pb rutile age put a constraint on the cooling history of the Yuanjiang rubies deposit. The new rutile age is consistent with our previous model that shows the ca. 28–22 Ma left lateral shearing plays an important role in transporting the ruby deposit toward the surface. This study provides the first example of in-situ U–Pb dating of rutile in the Himalayan tectonic belt, demonstrating the great potential of U–Pb rutile geochronology for Cenozoic mineral deposits.https://www.mdpi.com/2075-163X/11/4/433Cenozoic rutile U–Pb datingmarble-hosted ruby depositAilao Shan Complex |
| spellingShingle | Tianjian Yang Xiaoming Sun Guiyong Shi Ying Liu LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China Minerals Cenozoic rutile U–Pb dating marble-hosted ruby deposit Ailao Shan Complex |
| title | LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China |
| title_full | LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China |
| title_fullStr | LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China |
| title_full_unstemmed | LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China |
| title_short | LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China |
| title_sort | la icp ms u pb dating of cenozoic rutile inclusions in the yuanjiang marble hosted ruby deposit ailao shan complex southwest china |
| topic | Cenozoic rutile U–Pb dating marble-hosted ruby deposit Ailao Shan Complex |
| url | https://www.mdpi.com/2075-163X/11/4/433 |
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