中国西南部卡林型金矿床流体包裹体年代学研究─—以贵州烂泥沟大型卡林型金矿床为例

FLUID INCLUSION CHRONOLOGICAL STUDY OF THE CARLIN-TYPE GOLD DEPOSITS IN SOUTHWESTERN CHINA:AS EXEMPLIFIED BY THE LANNIGOU GOLD DEPOSIT,GUIZHOU PROVINCE

本文利用Rb－Sr法计时原理，分析测定了贵州烂泥沟大型卡林型金矿床不同成矿阶段的石英流体包裹体与方解石脉矿物的Rb、Sr同位素组成，获得一条线性较好的Rb－Sr等时线，其年龄值为105．6Ma，这一结果为我国卡林型金矿的研究提供了重要依据。

Rubidium and strontium isotopes were analyzed in fluid inclusion extracted from quartz and calcite gangue minerals of the Lannigou Carlin-type gold deposit, Guizhou Province. The results demonstrate that Rb and Sr isotopes in fluid inclusion are useful tools for dating mineralization events when applied to the Carlin-type gold deposits.Rb-Sr isotope data of fluid inclusion indicate that the mineralization age of the Lannigou Carlin-type gold deposit may be at 82～105. 6 Ma,and is in consistence with the geological events of these areas.