便携式X射线荧光光谱技术在泥河铁矿岩心矿化蚀变信息识别中的应用

夏庆霖; 成秋明; 陆建培; 肖文; 桑浩; 袁兆宪; 刘艳; 邱俊玲

doi:10.3799/dqkx.2011.035

便携式X射线荧光光谱技术在泥河铁矿岩心矿化蚀变信息识别中的应用

doi: 10.3799/dqkx.2011.035

夏庆霖^{1, 2,},
成秋明^{1, 2, 3},
陆建培²,
肖文²,
桑浩²,
袁兆宪²,
刘艳²,
邱俊玲²

1.
中国地质大学地质过程与矿产资源国家重点实验室，湖北武汉 430074
2.
中国地质大学资源学院，湖北武汉 430074
3.
加拿大约克大学地球空间科学与工程系，M3J1P3，加拿大多伦多

基金项目:

国家自然科学基金重点项目 40638041

教育部创新团队基金 IRT0755

国家"863"高新技术项目 2009AA06Z110

地质过程与矿产资源国家重点实验室科技部专项经费 GKZ10Y605

详细信息

作者简介:
夏庆霖(1968-)，男，教授，博士，主要从事矿产勘查与定量评价的教学与科研.E-mail: qlxia@cug.edu.cn

中图分类号: P618.31
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出版历程
- 收稿日期: 2010-12-02
- 刊出日期: 2011-03-01

Application of Portable XRF Technology to Identification of Mineralization and Alteration along Drill in the Nihe Iron Deposit, Anhui, East China

1.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
3.
Department of Earth and Space Science and Engineering, York University, Toronto M3J1P3, Canada

摘要

摘要: 便携式X射线荧光光谱(PXRF)是针对野外原位快速分析而发展起来的一项新技术，常被用于岩石露头地球化学研究和土壤重金属污染评价等方面.本研究以安徽省泥河铁矿钻孔为例，在野外对5个钻孔的岩心系统划分岩性段，利用便携式X射线荧光光谱仪原位测量每个岩性段的Fe、Mn、Cr、Co、Ni、Ti、V、Cu、Zn、Pb、Ag、Mo、K、Ca、As、Sb、Bi、Cs、Zr、Nb等元素含量，绘制钻孔各元素含量分布图.研究发现，(1)利用PXRF技术获得的岩心Fe元素高含量部位与根据化学分析得到的铁矿石品位数据而圈定的磁铁矿体范围吻合较好；(2)Fe元素和Fe-V-Mn-Cr-Ni-Ti-Bi组合异常、Zn元素和Zn-Cu-Cd组合异常分别对铁矿化和铜、锌矿化具有较好的指示作用；(3)K、Ca异常分别对钾长石化、硬石膏化等蚀变具有较好的指示作用.由此可见，PXRF技术在野外岩心矿化和蚀变信息识别中具有方便、快捷、实用、可靠、无损、成本低廉等优点.
- 便携式X射线荧光光谱 /
- 深部找矿 /
- 矿化 /
- 蚀变 /
- 泥河铁矿
Abstract: Portable X-ray fluorescence spectrum (PXRF) is a new analysis technique in-situ and is usually applied in both geochemical research at geological outcrop scale and heavy metal pollution assessment in soil. In this study, PXRF was used to recognize lithology section and to analyze the content of Fe, Mn, Cr, Co, Ni, Ti, V, Cu, Zn, Pb, Ag, Mo, K, Ca, As, Sb, Bi, Cs, Zr and Nb along 5 drill holes in the Nihe iron deposit, Anhui, East China. Based on these data, the spatial distribution of these elements is obtained. The results show that (1) the areas with high values of Fe obtained by PXRF have high spatial correlation with the area with high grade of Fe delineated by chemical analysis; (2) Fe anomalies, Fe-V-Mn-Cr-Ni-Ti-Bi anomalies, Zn anomalies and Zn-Cu-Cd anomalies are good indicators for Fe mineralization, Cu and Zn mineralization, respectively; and (3) K and Ca anomalies are good indictors for potash feldspar alteration and anhydrite alteration, respectively. These results indicate that PXRF is a convenient, quick, practical, reliable, and nondestructive technique of low cost for identifying of mineralization and alteration along drill in the field.
- portable X-ray fluorescence spectrum /
- deep mineral resources exploration /
- mineralization /
- alteration /
- Nihe iron deposit

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图 1 泥河铁矿矿区地质简图(据安徽省区调队1981资料改编)

Fig. 1. Simplified geological map of the Nihe iron deposit

下载: 全尺寸图片幻灯片

图 2 泥河铁矿Ⅰ纵剖面钻孔岩心Fe元素PXRF分析结果

Fig. 2. Fe composition in drills of No.Ⅰ section of the Nihe iron deposit obtained by PXRF

下载: 全尺寸图片幻灯片

图 3 泥河铁矿ZK0501钻孔岩心部分元素含量分布

1.下白垩统双庙组；2.下白垩统砖桥组；3.闪长玢岩；4.粗安岩；5.辉石粗安岩；6.玄武粗安岩；7.闪长玢岩；8.火山碎屑岩；9.凝灰质粉砂岩；10.次生石英岩；11.黄铁矿脉；12.磁铁矿体

Fig. 3. Element compositions map of drill of No.ZK0501 of Nihe iron deposit

下载: 全尺寸图片幻灯片

图 4 泥河铁矿钻孔岩心中的部分蚀变现象

Or.钾长石；Pl.斜长石；Ah.硬石膏；Py.黄铁矿；Mt.磁铁矿；Im.褐铁矿

Fig. 4. Some alteration photographs in drill of Nihe iron deposit

下载: 全尺寸图片幻灯片

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