| 碳还原法分析硫酸盐的氧同位素组成 |
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| 引用本文：万德芳,李延河,秦燕.2011.Carbon reduction method for oxygen isotope composition of sulfates[J].Mineral Deposits,30(4):749~753 |
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| 基金项目:本文得到中国地质科学院基本科研业务费专项经费（编号：SYS0710）及中国地质科学院矿产资源研究所基本科研业务费项目（编号：K0716-3）的联合资助 |
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| 中文摘要:硫酸盐矿物是自然界最常见矿物，也是自然界少数具有氧同位素非质量分馏效应的矿物之一。硫酸盐矿物的氧同位素组成可以为研究其形成过程和生成条件提供大量信息。目前，在国内外分析硫酸盐氧同位素的3种方法中，碳还原方法乃是分析硫酸盐中氧同位素组成的最精准方法。本次研究建立了分析硫酸盐中氧同位素组成的碳还原方法，介绍了硫酸钡的分析流程，分析了硫酸盐氧同位素国际标样NBS-127、实验室工作标准化学试剂硫酸钡S04-1、S04-2等样品的氧同位素组成。研究表明，该测试技术流程简单、操作便捷、分析精密度为±0.2 ‰（1σ），达到国际同类实验的先进水平。 |
| 中文关键词:地球化学 碳还原法 硫酸盐 氧同位素 分析方法 |
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| Carbon reduction method for oxygen isotope composition of sulfates |
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| Abstract:The oxygen isotopic composition and mass independent fractionation of sulfates can provide useful information for the formation conditions of sulfates, reveal special processes that cannot be acquired by element concentration or single isotope ratio measurements. This aspect is a frontier and hot topic in the isotope geochemical study both in China and abroad. The carbon-reduction method for oxygen isotope analysis of BaSO4 samples was founded in the authors' laboratory. The analytical processes of BaSO4 samples are described in this paper. The oxygen isotope compositions of an international standard sample NBS-127, laboratory work standard samples (S04-1) and laboratory work standard samples (S04-2) were measured. This analytical method is simple and its operation is easy. The precision of oxygen isotope ratios of these samples is up to ±0.2‰ (1σ), better than 0.15‰～0.29‰ (1σ) by Wassermen (1992). |
| keywords:geochemistry, carbon-reduction method, sulfate, oxygen isotope, analytical method |
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