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中国北方粉尘气溶胶中铁氧化物矿物的光谱分析 被引量：6

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摘要 利用漫反射光谱技术 (DRS)对中国北方粉尘气溶胶中铁氧化物矿物进行了较系统的研究 .结果表明 ,在可见光范围 ,粉尘气溶胶反射光谱的一阶导数曲线在 4 35和 5 6 0nm的峰对样品中的针铁矿和赤铁矿有识别指示意义 ,且样品中铁含量与赤铁矿和针铁矿的一阶导数特征峰值大小紧密相关 .同时发现不同颜色的反射率与样品中铁的含量及铁氧化物一阶导数值有较强的相关性 ,其中铁氧化物的含量变化对红光和紫光的反射率影响较为显著 ,表明铁氧化物在粉尘气溶胶的光学性质中扮演着重要的角色 .亚洲粉尘与北大西洋粉尘的光谱分析结果可以进行对比 .研究发现 ,不同区域粉尘气溶胶中赤铁矿与针铁矿一阶导数特征值的比值Hm/Gt存在明显差异 ,暗示着Hm/Gt值有源区指示的意义 .
作者 沈振兴 张小曳 季峻峰 王亚强 曹军骥 王丹 程燕
机构地区 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室 南京大学地球科学系内生金属矿床成矿作用研究国家重点实验室表生地球化学研究所
出处 《自然科学进展》 北大核心 2004年第8期910-916,共7页
基金 国家重点基础研究发展规划(G2000048703) 中国科学院知识创新重要方向(KZCX305) 国家自然科学基金(批准号:40205018)资助项目
关键词 粉尘气溶胶 光谱分析 铁氧化物矿物 源区指示 漫反射光谱技术
分类号 P425.55 [天文地球—大气科学及气象学]
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参考文献21

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二级参考文献16

  • 1[1]Sokolik I N, Toon O B. Direct radiative forcing by anthropogenic airborne mineral aerosols[J]. Nature, 1996, 381: 681-683.
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  • 8[8]JI J F, Balsam W L, CHEN J. Mineralogical and climate interpretation of the Luochuan loess section(China) based on Diffuse Reflectance Spectrophotometry[J]. Quaternary Research, 2001, 56: 23-30.
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共引文献6

同被引文献136

引证文献6

二级引证文献59

自然科学进展
2004年 第8期

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