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从湖南万古金矿区采集4件石英样品进行了氦同位素测定,获得了~3He/~4He值231×10~(-6)—1460×10~(-6)的数据。该数据反映了在万古金矿床形成时富~3He流体参与了成矿作用。而这种富~3He流体可能是受构造活动影响,由地幔岩石减压部分脱气造成动力学分馏而形成。
Four quartz samples were collected from the Wanghuang gold mine in Hunan Province for determination of helium isotope. The data of ~3He / ~ 4He were obtained from 231 × 10 -6 -660 × 10 -6. This data reflects the involvement of ~ 3He fluids in mineralization during the formation of the Vanuatu gold deposit. The 3He-rich fluid may be affected by the tectonic activity, which is caused by the kinetic fractionation caused by partial degassing of mantle rock decompression.