滇西北中甸弧成矿岩体中榍石化学成分特征及其成岩成矿标识

李华伟; 董国臣; 董朋生; 汤家辉; 王树树

doi:10.3799/dqkx.2019.193

Volume 45 Issue 6

Jun. 2020

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Article Navigation > Earth Science > 2020 > 45(6): 1999-2010

Li Huawei, Dong Guochen, Dong Pengsheng, Tang Jiahui, Wang Shushu, 2020. Titanite Chemical Compositions and Their Implications for Petrogenesis and Mineralization in Zhongdian Arc, NW Yunnan, China. Earth Science, 45(6): 1999-2010. doi: 10.3799/dqkx.2019.193

Citation:

Li Huawei, Dong Guochen, Dong Pengsheng, Tang Jiahui, Wang Shushu, 2020. Titanite Chemical Compositions and Their Implications for Petrogenesis and Mineralization in Zhongdian Arc, NW Yunnan, China. Earth Science, 45(6): 1999-2010. doi: 10.3799/dqkx.2019.193

Citation:

Li Huawei, Dong Guochen, Dong Pengsheng, Tang Jiahui, Wang Shushu, 2020. Titanite Chemical Compositions and Their Implications for Petrogenesis and Mineralization in Zhongdian Arc, NW Yunnan, China. Earth Science, 45(6): 1999-2010. doi: 10.3799/dqkx.2019.193

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Titanite Chemical Compositions and Their Implications for Petrogenesis and Mineralization in Zhongdian Arc, NW Yunnan, China

doi: 10.3799/dqkx.2019.193

School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

Received Date: 2019-04-01
Publish Date: 2020-06-15

Abstract

Abstract

Zhongdian arc is located in the southern section of the Yidun arc at the Sanjiang Tethys, Southwest China. It is known as the Indosinian porphyry copper deposits and the Yanshanian skarn-hydrothermal quartz vein Mo-W-Cu deposits. In this paper, it was measured the titanite chemical compositions from ore-forming rocks of Pulang, Disuga and Xiuwacu with EMPA and LA-ICP-MS to discuss their implications for petrogenesis and mineralization. The titanites from Pulang, Disuga and Xiuwacu are all of magmatic origin. The titanite formation temperature from Pulang pluton is 743-754 ℃, and 702-753 ℃ from Xiuwacu pluton. Based on the δCe, δEu from titanites, it can be inferred that the order of oxygen fugacity of these plutons is: Pulang > Disuga > Xiuwacu. It requires high magma oxygen fugacity for Cu mineralization, but the Cu contents in titanite are insensitive to the content variations of Cu in magma, which can not be used as an indication of the Cu contents in magma. Mo mineralization does not require high magma oxygen fugacity, and the magma oxygen fugacity and crystalization of molybdenite need to be thought when we use the Mo contents of titanite to determine the Mo fertility in magma. The F contents in magma can reduce magma viscosity and promote Mo mineralization which can be an indication for Mo mineralization. The W and Sn contents in the titanite is a good indication of the Mo-W mineralization, and the W and Sn contents in the Xiuwacu Mo-W deposit are higher than those in the Pulang and Disuga.
- Yidun,
- Zhongdian arc,
- titanite,
- petrogenesis and mineralization,
- mineral deposit

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References(46)

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