摘要
金沙厂铅锌矿床是赋存于震旦系灯影组中的密西西比河谷型矿床。它的铅同位素为J型铅,硫同位素变化范围小,成矿温度为114-290℃,并含有具工业价值的辰砂矿物,是我国产于碳酸盐岩的铅锌矿床中的一个典型矿床。矿床明显地受有利的构造岩相带及岩性组合的联合控制。本文就金属来源、硫的来源和成矿物质的搬运形式和沉淀作了探讨。
The Jinshachang Pb-Zn deposit occurs in Dengying Formation (Sinian), belonging to Mississippi valley type. Lead isotope composi-tion is of 'J type', sulpher isotope ratio varies within the range of +1.1 and +7 permil, fluid inclusion temperature 114-290℃.Cinnabar is the main accompanying mineral in an industrial amount. The deposit is clearly controlled by advantageous structures andlithofacies. and is regarded as a typical base metal deposit occuring in carbonate rocks in China. Problems concerning source material, orefluid transportation and precipitation are discussed.
关键词
云南省
铅锌矿
矿床成因
Yunnan Province
lead-zinc deposit
structure-lithofacies belt
Dengying Formation
