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By taking lamprophyres in the Laowangzhai gold orefield, Yunnan Province, as starting materials, the melting experiments of lamprophyre + gold have been conducted under 1.5 and 3.0 GPa in a DS-29A cubic-type 3 600 t ultrahigh-pressure apparatus. The experimental results showed that gold powder (less than 0.045 mm) which even contributed in the samples be-
By taking lamprophyres in the Laowangzhai gold orefield, Yunnan Province, as starting materials, the melting experiments of lamprophyre + gold have been conducted under 1.5 and 3.0 GPa in a DS-29A cubic-type 3 600 t ultrahigh-pressure apparatus. The experimental results showed that gold powder (less than 0.045 mm) which even contributed in the samples be-