Emplacement age and PGE geochemistry of lamprophyres in the Laowangzhai gold deposit,Yunnan,SW China
Emplacement age and PGE geochemistry of lamprophyres in the Laowangzhai gold deposit, Yunnan, SW China出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)
年 卷 期：2001年第44卷第S1期
页 面：146-154页
学科分类：070902[理学-地球化学] 081803[工学-地质工程] 0709[理学-地质学] 07[理学] 08[工学] 0818[工学-地质资源与地质工程]
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
主 题：thermochronology PGE geochemistry lamprophyre Laowangzhai gold deposit Yunnan.
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.
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