摘要
Widely-distributed lamprophyres in the Laowangzhai gold deposit were associated closely with gold ores. Phlogopite ^(40)Ar/^(39)Ar dating suggests that the emplacement age of lampro-phyric magma ranges from (30.8±0.4) to (34.3±0.2) Ma, and gold mineralization took place at (26.4±0.2) Ma. PGE geochemical tracing indicates that gold in the gold deposit did not come from the primitive lamprophyric magma. The tempo-spatial paragenesis between lamprophyres and mesothermal gold deposits along the Jinsha-Red River belt may be attributed to the fact that they formed in the same tectonic setting.
Widely-distributed lamprophyres in the Laowangzhai gold deposit were associated closely with gold ores. Phlogopite <sup>40</sup>Ar/<sup>39</sup>Ar dating suggests that the emplacement age of lampro-phyric magma ranges from （30.8±0.4） to （34.3±0.2） Ma, and gold mineralization took place at （26.4±0.2） Ma. PGE geochemical tracing indicates that gold in the gold deposit did not come from the primitive lamprophyric magma. The tempo-spatial paragenesis between lamprophyres and mesothermal gold deposits along the Jinsha-Red River belt may be attributed to the fact that they formed in the same tectonic setting.
基金
the Chinese National Key Project for Basic Research on Tibetan Plateau (G1998040800). the National Natural Science Foundation of China (Grant Nos. 49972026. 49472100). the National Climbing Project (95-Y-25), CAS's Projects (KZCX2-101, KZ952-J1-408) and
