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煌斑岩广泛分布于云南老王寨金矿区并与金矿体密切共生.煌斑岩中金云母的~(40)Ar/~(39)Ar定年表明,其侵位时间为(30.8±0.4)～(34.3±0.2)Ma,而Au成矿作用时间为(26.4±0.2)Ma.铂族元素(PGE)地球化学示踪表明,金矿床中的Au不可能源于原始煌斑岩浆.Au沙江-红河带煌斑岩与中温热液Au矿在时空上的共生原因是它们形成于相同的构造背景.
The lamprophyres are widely distributed in the Laowangzhai gold deposit and closely related to the gold ore body.The ~ (40) Ar / ~ (39) Ar dating of phlogopite in the lamprophyre shows that the emplacement time is (30.8 ± 0.4) ~ (34.3 ± 0.2) Ma, while the Au mineralization time is (26.4 ± 0.2) Ma. Geochemical tracing of PGE shows that Au in the gold deposits can not originate from the original lamprophyre magma, The symbiosis reason of the Shajiang-Honghe belt lamprophyres and the mesothermal Au deposits in time and space is that they formed on the same tectonic setting.