Geochronology and Geochemistry of the Granites from the Longtoushan Hydrothermal Gold Deposit in the Dayaoshan Area, Guangxi:Implication for Petrogenesis and Mineralization

Lihua Qian; Jianqing Lai; Lifang Hu; Rong Cao; Shilong Tao; Bei You

doi:10.1007/s12583-018-1204-7

Volume 30 Issue 2

Apr 2019

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Journal of Earth Science > 2019 > 30(2): 309-322.

Lihua Qian, Jianqing Lai, Lifang Hu, Rong Cao, Shilong Tao, Bei You. Geochronology and Geochemistry of the Granites from the Longtoushan Hydrothermal Gold Deposit in the Dayaoshan Area, Guangxi:Implication for Petrogenesis and Mineralization. Journal of Earth Science, 2019, 30(2): 309-322. doi: 10.1007/s12583-018-1204-7

Citation:

Lihua Qian, Jianqing Lai, Lifang Hu, Rong Cao, Shilong Tao, Bei You. Geochronology and Geochemistry of the Granites from the Longtoushan Hydrothermal Gold Deposit in the Dayaoshan Area, Guangxi:Implication for Petrogenesis and Mineralization. Journal of Earth Science, 2019, 30(2): 309-322. doi: 10.1007/s12583-018-1204-7

Citation:

Lihua Qian, Jianqing Lai, Lifang Hu, Rong Cao, Shilong Tao, Bei You. Geochronology and Geochemistry of the Granites from the Longtoushan Hydrothermal Gold Deposit in the Dayaoshan Area, Guangxi:Implication for Petrogenesis and Mineralization. Journal of Earth Science, 2019, 30(2): 309-322. doi: 10.1007/s12583-018-1204-7

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Geochronology and Geochemistry of the Granites from the Longtoushan Hydrothermal Gold Deposit in the Dayaoshan Area, Guangxi:Implication for Petrogenesis and Mineralization

doi: 10.1007/s12583-018-1204-7

Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, School of Geosciences and Info-physics, Central South University, Changsha 410083, China

Funds:

the Project of Innovationdriven Plan in Central South University 2015CX008

the Fundamental Reserch Funds for the Central Universities of Central South University 2015zzts071

More Information

Corresponding author: Jianqing Lai
Received Date: 21 Apr 2018
Accepted Date: 30 Jul 2018
Publish Date: 01 Apr 2019

Abstract

Abstract

The gold mineralization in the Longtoushan hydrothermal gold deposit is concentrated within the contact zone of the granitic complex. Whole rock geochemistry and in-situ U-Pb and Hf isotopic data were used to constrain the genesis and age of the granites and related Cu-Au mineralization in the Longtoushan Deposit. The granites mainly consist of the granite porphyry, rhyolite porphyry, porphyritic granite and quartz porphyry. LA-ICP-MS U-Pb dating of zircons from the granite porphyry, rhyolite porphyry and quartz porphyry indicates that they intruded from ca. 94 to 97 Ma. These intrusions exhibit similar trace element characteristics, i.e., right-dipping REE patterns, depletion of Ba, Sr, P and Ti, and enrichment of Th, U, Nd, Zr and Hf. The ε_Hf(t) values of zircons from the granite porphyry, rhyolite porphyry and quartz porphyry range from -26.81 to -8.19, -8.12 to -5.33, and -8.99 to -5.83, respectively, suggesting that they were mainly derived from the partial melting of the Proterozoic crust. The Cu-Au mineralization is mainly related to the rhyolite porphyry and porphyritic granite, respectively. The Longtoushan granites were most likely formed in a post-collisional extensional environment, and the deposit is a part of the Late Yanshanian magmatism related mineralization in the Dayaoshan area and its adjacent areas.
- Longtoushan gold deposit,
- rhyolite porphyry,
- zircon U-Pb dating,
- Hf isotopes,
- petrogenesis,
- Cu-Au mineralization

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References(56)

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