Zircon U-Pb age, Sr-Nd isotopic characteristics and its geological significance of the granites from the Meixian zinc-lead polymetallic deposit, central Fujian Province

XIAO Xiaoniu; FEI Lidong; YU Xinming; QIN Xinlong; XIAO E; LIU Rongfang

2019 Vol. 38, No. 10

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XIAO Xiaoniu, FEI Lidong, YU Xinming, QIN Xinlong, XIAO E, LIU Rongfang. Zircon U-Pb age, Sr-Nd isotopic characteristics and its geological significance of the granites from the Meixian zinc-lead polymetallic deposit, central Fujian Province[J]. Geological Bulletin of China, 2019, 38(10): 1733-1739.

Citation:

XIAO Xiaoniu, FEI Lidong, YU Xinming, QIN Xinlong, XIAO E, LIU Rongfang. Zircon U-Pb age, Sr-Nd isotopic characteristics and its geological significance of the granites from the Meixian zinc-lead polymetallic deposit, central Fujian Province[J]. Geological Bulletin of China, 2019, 38(10): 1733-1739.

Zircon U-Pb age, Sr-Nd isotopic characteristics and its geological significance of the granites from the Meixian zinc-lead polymetallic deposit, central Fujian Province

1.
School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, Jiangsu, China
2.
East China Mineral Exploration and Development Bureau for Non-Ferrous metals, Nanjing 210007, Jiangsu, China
3.
Fujian Jindong Mining Co., Ltd., Sanming 365101, Fujian, China

Received Date: 06 January 2018

Revised Date: 19 October 2018

Publish Date: 15 October 2019

Abstract

Abstract

In order to discuss the genesis of the granites in the Meixian orefield of central Fujian Province, this paper reports petrography, geochronology and Sr-Nd isotope data. Zircon U-Pb dating yielded an age of 158±3Ma for the Xiaojiao granites, indicating that they were formed in Late Jurassic in the middle Yanshanian period. Isotopically, sample analyses show high and variable initial I_Sr ratios (0.707099~0.710082) but low and constant ε_Nd(t) (-9.79~-10.92), showing crust source characteristics obviously and indicating that Meixian granites are highly fractionated I-type granites. Combined with previous research results, it is held that the granites of the middle Yanshanian period in Meixian area were formed by the sub-reduction stretching and extension of the paleo-Pacific plate to the Eurasian plate, and were emplaced at the extention orogenic stage within the plate.
- geochronology /
- Sr-Nd isotope /
- granites /
- Meixian /
- central Fujian Province

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References

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