祁漫塔格成矿带磁铁矿Fe<sup>2+</sup>/Fe<sup>3+</sup>比值测定方法对比研究

易立文; 鲁安怀; 谷湘平; 池国祥; 曹丽

doi:10.12090/j.issn.1006-6616.2019.25.S1.001

祁漫塔格成矿带磁铁矿Fe²⁺/Fe³⁺比值测定方法对比研究

doi: 10.12090/j.issn.1006-6616.2019.25.S1.001

易立文^{1, 2,},
鲁安怀²,
谷湘平²,
池国祥³,
曹丽¹

1.
湖南师范大学资源与环境科学学院, 湖南长沙 410081
2.
中南大学地球科学与信息物理学院, 湖南长沙 410083
3.
里贾纳大学地质系, 加拿大里贾纳S4S 0A2

基金项目:

国家重点研发计划项目 2016YFC0502406

详细信息

作者简介:
易立文(1988-), 男, 讲师, 硕士生导师, 主要从事成因矿物学与矿床地球化学研究。E-mail:yiliwen1988@163.com

中图分类号: P618.31
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出版历程
- 刊出日期: 2019-05-01

EVALUATION OF THE METHODS FOR QUANTITATIVE DETERMINATION OF FE²⁺/FE³⁺ RATIOS OF MAGNETITE FROM QIMANTAG METALLOGENIC BELTS

1.
College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China
2.
School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
3.
Department of Geology, University of Regina, Regina, Saskatchewan S4S 0A2, Canada

摘要

摘要: 为了厘清磁铁矿成分测试过程中Fe²⁺/Fe³⁺比值分析各种方法的准确性及适用范围；采用直接测氧法、Lβ/Lα强度比值法、电价差值法、剩余氧法和穆斯堡尔谱法，对祁漫塔格成矿带中典型矿床中磁铁矿的Fe²⁺/Fe³⁺比值进行了研究，结果表明电价差值法、剩余氧法和穆斯堡尔谱法是相对比较准确的测试方法，但穆斯堡尔谱法不是原位分析方法，存在适用范围的缺陷。
- 电子探针 /
- 直接测氧 /
- 铁价态 /
- 祁漫塔格
Abstract: Through the determination of Fe²⁺/Fe³⁺ ratios of magnetite from the Qimantag metallogenic belt, the quality of five different methods is evaluated. Oxygen as a super light element, affects the determination results of FeO and Fe₂O₃ observably when direct oxygen measurement method is used. The valence state method, based on Lα and Lβ spectral intensity ratio of Fe, is also unreliable for FeO and Fe₂O₃ measurements, because it is hard to establish the relationship between Lβ/ Lα (spectral intensity ratio) and Fe²⁺/Fe³⁺(content ratio). Relatively, the charge difference method, the surplus-oxygen method and Mssbauer spectroscopy are still the most favorable methods; however, Mssbauer spectroscopy is limited in spatial resolution to ca. 200 mm, obliterating potential zonations in Fe²⁺/ Fe³⁺ ratio.
- electron probe microanalysis /
- Direct measurement of oxygen /
- Valence of iron /
- Qimantag metallogenic belt

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图 1 Fe²⁺/Fe³⁺ 比值图

Figure 1. Fe²⁺/Fe³⁺ ratios diagram

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参考文献(13)

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