摘要
此矿床为国内外罕见的氟镁石型金矿床。对其进行了系统的流体包裹体研究,结果表明,该矿床矿物中普遍存在流体包裹体,且包裹体类型多样。在成矿过程中,即从成矿早阶段到主阶段,热液的温度、盐度、pH值降低,而氧化性有所增强。金的成矿作用主要发生在中温(220-280℃)、中浅成(1.1-2.3km)、中盐度(86%-23.6%)、弱碱性(pH=7.21)和弱还原(Eh=-0.334V)条件下。
Pianyanzi gold deposit is an unique type-sellaite type gold deposit. It is hosted by dolomitite of the Upper Sinian Dengying Formation. A research for fluid inclusions indicates that temperature,salinity and PH value of ore fluid decreased gradually with increase in Eh value. Ore-formation took place under conditions of medium temperature (220-280℃ ),medium-deep and nearusurface (1. 1-2. 3km),medium salinity (8. 6%-23. 6 % ),pH value of 7. 21 and Eh value of-0. 334.
出处
《四川地质学报》
1997年第1期36-42,共7页
Acta Geologica Sichuan
关键词
金矿床
流体包裹体
物理化学条件
偏岩子
fluid inclusion, physical-chemical condition, gold deposit, Pianyanzi