| FAN Fei-peng,XIAO Hui-liang,CHEN Le-zhu,LI Hai-li,LIU Jian-xiong,DENG Zhong-lin,LI Shao-bin,LIN Geng-wei,ZHOU Xia.Copper Isotope Studies of a Deep Ore Body in the Xinliaodong Copper-Polymetallic Deposit, Eastern Guangdong Province[J].Rock and Mineral Analysis,2017,36(4):420-429 |
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| Copper Isotope Studies of a Deep Ore Body in the Xinliaodong Copper-Polymetallic Deposit, Eastern Guangdong Province |
| Received:September 01, 2016 Revised:March 20, 2017 |
| DOI：10.15898/j.cnki.11-2131/td.201609010133 |
| Key words: copper isotope Eastern Guangdong Province Xinliaodong copper-polymetallic ore district copper orebody magma |
| Author Name | Affiliation | | FAN Fei-peng | Nanjing Center of Geological Survey, China Geological Survey, Nanjing 210016, China | | XIAO Hui-liang | Nanjing Center of Geological Survey, China Geological Survey, Nanjing 210016, China | | CHEN Le-zhu | Nanjing Center of Geological Survey, China Geological Survey, Nanjing 210016, China | | LI Hai-li | Nanjing Center of Geological Survey, China Geological Survey, Nanjing 210016, China | | LIU Jian-xiong | Foshan Geological Bureau of Guangdong Province, Foshan 528000, China | | DENG Zhong-lin | Foshan Geological Bureau of Guangdong Province, Foshan 528000, China | | LI Shao-bin | No.2 Geological Party, Guangdong Geological Bureau, Shantou 515000, China | | LIN Geng-wei | No.2 Geological Party, Guangdong Geological Bureau, Shantou 515000, China | | ZHOU Xia | No.2 Geological Party, Guangdong Geological Bureau, Shantou 515000, China |
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| Abstract: |
| The Xinliaodong copper-polymetallic deposit of Eastern Guangdong Province is one of newly discovered deposits. The ore district belongs to tin, tungsten, and copper ore cluster in the southeast coast, which have a very good ore-forming geological conditions. Chalcopyrite has δ65Cu value ranging from-0.34‰ to +1.37‰, which is consistent with δ65Cu value of porphyry deposits, indicating that ore-forming material Cu was derived from deep magma and ore-forming fluids were medium-high-temperature (250-420℃) magmatic-hydrothermal fluids. There is a close relationship between the fractionation of Cu isotope and magmatic hydrothermal activity. The formation of ore body is related to the dissolution of ore-forming fluids. With the increase of depth, there is atrend of increasing δ65Cu value, indicating a potential of a largee orebody. Copper isotope can directly indicate the location of the heat source. The δ65Cu values are below 0 for copper ore bodies close to the hydrothermal quartz veins.But the copper isotope values are higher in the hydrothermal contact zone, special ore-bearing surrounding rock and tectonic zone where indicates the edge or the front of the main ore body, most obvious ore prospecting mark. |
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