摘要
天宝山铅锌矿床的铅同位素组成变化大,硫同位素组成变化范围小,成矿温度低于150～250℃,成矿深度为1km。它是我国产于碳酸盐岩层中的MVT铅锌矿床之一,受有利的岩性、岩相和构造的共同控制。该文通过铅、硫、碳同位素组成、稀土元素组成、微量元素和流体包裹体资料,对成矿物质的来源及其搬运、沉淀机理作了探讨。
The Tianbaoshan Pb-Zn deposit occurs in Dengying Formation (Sinian), belonging to MVTdeposits occurring in carbonate rocks in Sichuan, China. Its lead isotopes vary significantly, and sulfurisotopic ratio varies mainly within the range of-2.2 and+8.1 permil. The deposit is formed in a.depth of about 1km and in temperatures ranging from<150℃ to 250℃. It is controlled byfavourable structures, lithofacies and lithological characters. Problems concerning the source, trans-portation and precipitation of ore-forming materials are discussed on the basis of systematic study of.lead, sulfur and carbon isotopes, REE, trace elements and fluid inclusions.
关键词
铅锌矿
灯影组
成因
矿床
Sichuan Province
Pb-Zn deposit
Dengying Formation
genesis analysis
MVT deposit
