| Auriferous Quartz Veins from the Dongping Gold Deposit,NW Hebei Province and Metallogenesis—Fluid Inclusion Rb—Sr Isochron Evidence |
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| 摘 要： |
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| 关 键 词： | 石英型金矿床 铷同位素 锶同位素 稀土元素 Rb－Sr等时线 |
Auriferous quartz veins from the Dongping gold deposit,NW Hebei Province and Metallogenesis—Fluid inclusion Rb-Sr isochron evidence |
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| Authors: | Mo Cehui Wang Xiuzhang Cheng Jingping |
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| Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou |
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| Abstract: | The Dongping gold deposit, situated on the northern margin of the North China Platform, is a composite deposit composed of
auriferous quartz vein-type and altered rock-type ore bodies. It is hosted in the inner contact zone of an alkaline intrusion
which was intruded into Archean metamorphic rocks and was formed not later than the Hercynian period. Auriferous quartz veins
of the deposit are dated with the fluid inclusion Rb-Sr isochron method at 103 ± 4 Ma, indicating that the gold deposit was
formed in the Yenshanian period.87Sr/86Sr sourcetracing shows the ore forming materials came dominantly from alkaline intrusions. These results, combined with other
isotope and REE data, suggest that the Dongping gold deposit is not a traditional magmatic hydrothermal deposit, but a reworked
hydrothermal deposit related to heated and evolved meteoric water.
This project (49372105) is financially supported by the National Natural Science Foundation of China. |
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| Keywords: | gold deposit quartz vein Rb-Sr isochron Dongping |
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