罗布泊卤水室内蒸发及天然石盐包裹体均一温度分析探讨  

The Research on the Homogenous Temperatures of Inclusions in Halite from the Isothermal Evaporation of Brine and Natural Halite from Lop Nor Playa, Xinjiang, China

作　　者：刘成林[1] 陈永志[2] 焦鹏程[2] 李荫清[2] 王弭力[2] 

机构地区：[1]北京大学环境学院,北京100871 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《东华理工学院学报》2005年第4期306-312,共7页Journal of East China Institute of Technology

基　　金：国家"十五"科技攻关305项目(2001BA609A-07-15)地质调查项目(200210200051;200010300105)

摘　　要：罗布泊卤水经室内恒温(30℃和52℃)蒸发结晶析出石盐,其内舍有丰富的液相包裹体。测试这些石盐液相包裹体均一温度,发现仅有少量包裹体均一温度与石盐结晶卤水温度一致,大多数均一温度明显偏离结晶温度,大多数高出卤水温度约20℃-90℃,少数低于卤水温度约6℃-30℃,罗布泊盐湖自然沉积的石盐液相包裹体均一温度也存在类似情况,除少部分数据与当地卤水温度相近,大多也存在明显的差异。说明石盐包裹体均一温度可能受制于多个因数影响。因此,用石盐包裹体均一温度恢复沉积时期古水温或流体介质温度时,不能简单应用,需要综合分析才能从中提取可靠的地质信息。Halite has crystallized at the 30 ℃ and 52 ℃ isothermal evaporations in lab from brine of Lop Nor salty lake, Xinjiang, China. And the plenty of liquid-phase inclusions occur in the halites. The homogenous temperatures of liquid-phase inclusions in halite is measured. The results show that only few temperature data of liquidphase inclusions are close to 30 ℃ and 52 ℃ temperatures of brine, but most of the temperatures are by 20 -90 ℃ higher than the fixed temperatures, a few are by 6 - 30 ℃ lower than those. In addition, the homogenous temperatures of natural halite from salty lake of Lop Nor also show the similar case, i. e. , most of them are obviously away from the possible temperature of the halite-crystallizing brine. These materials show that they are influenced by a few factors. Therefore, the homogenous temperature of liquid-phase inclusions in halite must be carefully applied in determining the temperatures of paleo-lake water or medium; only through the synthetic analysis, are the reliable information obtained.

关 键 词：石盐 包裹体 均一温度 环境温度 罗布泊 

分 类 号：P619.211[天文地球—矿床学]