硼同位素分馏及其在环境研究中的应用  

Boron Isotope Fractionation and Its Application in Environmental Study

作　　者：张崇耿[1] 肖应凯[1] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008

出　　处：《盐湖研究》2002年第2期54-60,共7页Journal of Salt Lake Research

摘　　要：二十世纪八十年代以来 ,由于硼同位素的测量技术的创新和改进 ,硼同位素地球化学的研究领域不断拓宽。研究表明 ,自然界中δ11B值的变化范围为 -3 7‰～ +5 8‰ ,不同地质体中δ11B值明显不同 ,反之 ,硼同位素组成与生成环境密切相关 ,可以反映其地质成因环境或地质作用过程。近年来 ,硼同位素在研究海水入侵 ,示踪古海洋和古气候条件 ,和判断污染源区等方面取得初步成效。In the eighties,due to the innovation of the determination technology of boron isotopes,the researched fields of the geochemical characteristics of boron isotopes are continuously broadened.The previous research shows that there is a large variation of 11 B / 10 B ratios in the various,natural samples with δ 11 B values from -37‰ to +58‰.The boron isotope composition(δ 11 B)may vary,depending on their circumference.Wereas,geological environment of cause of forming or process may evidently be showed by boron isotope composition.Recently,boron isotopes may be used to estimate seawater intrusion and trace the condition of paleo-ocean and paleo-climate and distinguish the environmental contamination.

关 键 词：硼同位素 分馏 环境意义 地球化学 示踪剂 古海洋 古气候 

分 类 号：P597[天文地球—地球化学]