金红石微量元素电子探针分析
发布时间：2018-11-11 12:04
【摘要】：金红石电子探针微量元素分析一般以人工合成的氧化物来作为监测标样,尚较缺乏对金红石标样进行系统地测试分析。本文运用CAMECA SXFive电子探针对金红石标样R10进行微量元素分析,根据金红石中主要微量元素在地质学中的应用,本次共分析了Al、Si、Ti、Fe、Cr、Zr、V、Nb、Ta等9个元素,Ti、Si元素作为本次分析的监测元素。本文通过调整加速电压和电流、背景和峰值测试时长以及干扰谱峰处理等来提高微量元素分析精度和准确度。分析结果显示,其中,Zr(780±29×10~(-6))(1SD,n=25)、Nb(2799±66×10~(-6))、V(1276±33×10~(-6))、Fe(4309±34×10~(-6))、Cr(718±31×10~(-6))的分析结果与二次离子质谱(SIMS)和激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)的推荐值在误差范围内一致。大部分元素数据波动范围在10%以内,V、Fe元素的数据波动范围仅在5%以内。V、Nb和Fe测试精度比前人电子探针分析结果有较大提高。金红石Zr测试误差传递给金红石Zr温度计给出的温度误差一般22℃。本文还对金红石Zr温度计应用、提高Ta元素分析精度和准确度、金红石Fe~(3+)分析等问题进行了探讨。
[Abstract]:The synthetic oxide is generally used as the monitoring standard for trace element analysis of rutile by electron probe, but it is still lack of systematic test and analysis of rutile standard sample. In this paper, CAMECA SXFive electron probe was used to analyze trace elements in rutile standard sample R10. According to the application of main trace elements in rutile geology, nine elements, such as Al,Si,Ti,Fe,Cr,Zr,V,Nb,Ta, were analyzed in this paper. The Ti,Si element is the monitoring element for this analysis. In this paper, the precision and accuracy of trace element analysis are improved by adjusting the acceleration voltage and current, background and peak time, and interference spectrum peak processing. The results show that, Zr (780 卤29 脳 10 ~ (-6) (1), Nb (25), Nb (2799 卤66 脳 10 ~ (-6), V (1276 卤33 脳 10 ~ (-6), Fe (4309 卤34 脳 10 ~ (-6), The analytical results of Cr (718 卤31 脳 10 ~ (-6) are consistent with the recommended values of secondary ion mass spectrometry (SIMS) and laser denudation inductively coupled plasma mass spectrometry (LA-ICP-MS) in the range of errors. The data fluctuation range of most elements is less than 10%, while that of VN Fe is less than 5%. The accuracy of VNb and Fe is much higher than that of previous electron probe analysis. The error of rutile Zr measurement is transmitted to the temperature error given by the Zr thermometer of rutile, which is generally 22 鈩，
本文编号：2324785
[Abstract]:The synthetic oxide is generally used as the monitoring standard for trace element analysis of rutile by electron probe, but it is still lack of systematic test and analysis of rutile standard sample. In this paper, CAMECA SXFive electron probe was used to analyze trace elements in rutile standard sample R10. According to the application of main trace elements in rutile geology, nine elements, such as Al,Si,Ti,Fe,Cr,Zr,V,Nb,Ta, were analyzed in this paper. The Ti,Si element is the monitoring element for this analysis. In this paper, the precision and accuracy of trace element analysis are improved by adjusting the acceleration voltage and current, background and peak time, and interference spectrum peak processing. The results show that, Zr (780 卤29 脳 10 ~ (-6) (1), Nb (25), Nb (2799 卤66 脳 10 ~ (-6), V (1276 卤33 脳 10 ~ (-6), Fe (4309 卤34 脳 10 ~ (-6), The analytical results of Cr (718 卤31 脳 10 ~ (-6) are consistent with the recommended values of secondary ion mass spectrometry (SIMS) and laser denudation inductively coupled plasma mass spectrometry (LA-ICP-MS) in the range of errors. The data fluctuation range of most elements is less than 10%, while that of VN Fe is less than 5%. The accuracy of VNb and Fe is much higher than that of previous electron probe analysis. The error of rutile Zr measurement is transmitted to the temperature error given by the Zr thermometer of rutile, which is generally 22 鈩，
本文编号：2324785
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