同位素地质科学技术的新进展  

THE LATEST DEVELOPMENT IN ISOTOPIC GEOSCIENCES

作　　者：张文淮[1] 

机构地区：[1]中国地质大学

出　　处：《地质科技情报》1991年第2期67-72,共6页Geological Science and Technology Information

摘　　要：本文论述了同位素地质科学技术近年来所取得的一系列新进展,主要表现在:1.激光共振离子化质谱技术(RIMS);2.二次离子化质谱技术(SIMS);3.热离子化质谱技术(TIMS);4.同位素比值鉴测质谱技术(Irm-MS);5.流体包裹体~10Ar/~39Ar、Rb/Sr、Sm/Nd年龄测定及稳定同位素测定技术.对某些方法进行了离子分离和气体收集等方面的改进,如Pb的逐步蒸发技术,镭的化学分离和质谱测气.由于离子探针和激光技术的引进,使同位素测试可以在单个矿物的微区以及单个包裹体上进行.同位素地质科学技术的发展和它在现在及未来的应用可能性、它对地质科学及环境科学所产生的巨大影响,使我们面临新的严峻挑战.This paper discribes the latest developments in isotopic geosciences which include laser resonant ionization combination with mass spectrometry (RIMS) .secondary ionization combination with mass spectrometry (SIMS) .thermal ionization combination with mass spectrometry (TIMS) ,isotope ratio monitoring mass spectrometry (IRM-MS) .and isotopic dating and stable isotopic ratio of fluid inclusion (10Ar/39Ar、Stn/Nd、Rb/Sr and δ18O、δD、δ31S). These latest developments also include improvement of ion separating and gases extracting (for example stepwise Pb-evaporation and chemical separation of Ra and its mass spectrometry). Due to the introduction of ion probe and laser beam techniques, isotopic determination can be carried out on micro-scale of single minerals and single inclusions. These techniques have made great progress in isotopic geosciences. Their presence and potential application will be of great importance to the development of geological and environmental sciences, and encounter us with .enormous new challenges.

关 键 词：同位素地质学 发展 

分 类 号：P597[天文地球—地球化学]