便携式能量色散X射线荧光光谱仪在新疆东天山浅钻化探异常查证中的应用

杨帆; 郝志红; 刘华忠; 郭志娟; 王徽

doi:10.15898/j.cnki.11-2131/td.2015.06.010

便携式能量色散X射线荧光光谱仪在新疆东天山浅钻化探异常查证中的应用

1.
中国地质科学院地球物理地球化学勘查研究所, 河北廊坊 065000

2.
中国地质大学(北京)地球科学与资源学院, 北京 100083

基金项目: 国土资源地质大调查项目(1212011220598|12120113101000)|国土资源部公益性行业科研专项(201411024)

详细信息

作者简介: 杨帆, 工程师, 在读博士生, 主要从事勘查地球化学基础理论及方法技术研究。E-mail:yangfan@igge.cn

通讯作者: 郝志红, 硕士, 工程师, 主要从事地球化学样品中元素配套分析方法及其标准化研究。E-mail:haozhihong@igge.cn

中图分类号: P62;O657.31

收稿日期: 2015-04-13

修回日期: 2015-09-22

录用日期: 2015-11-08

刊出日期: 2015-06-25

Application of Minipal4 Portable Energy Dispersive X-ray Fluorescence Spectrometer in the Verification of Geochemical Anomaly Delineated by Shallow Hole Drill Core in Eastern Tianshan

1.
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China

2.
School of Earth Science and Resources, China University of Geosciences(Beijing), Beijing 100083, China

More Information

Corresponding author: HAO Zhi-hong, haozhihong@igge.cn

Received Date: 13 April 2015

Revised Date: 22 September 2015

Accepted Date: 08 November 2015

Publish Date: 25 June 2015

摘要

摘要:
便携式能量色散X射线荧光光谱仪(EDXRF)具有大型XRF光谱仪的分析性能, 在矿产资源勘查中具有广阔的应用前景, 特别是在勘查难度大、找矿工作周期长的覆盖区的现场快速分析具有重要意义, 但在野外快速分析方面亟需进一步开发。本文采用手工压制样片, 建立了Minipal 4便携式能量色散XRF光谱仪现场测定新疆东天山浅覆盖区浅钻化探样品中的铜铅锌砷钴镍锰7种元素的野外快速分析方法, 各元素的检出限分别为2、2、1.5、2、2、2、6μg/g, 精密度(RSD, n=12) 小于4.7%。本方法能在浅覆盖区实施有效的地球化学样品分析, 数据成图效果与实验室分析数据成图效果接近, 可快速指导浅钻化探扫面和异常查证工作, 缩短了工作周期, 提高了矿产资源勘查效率。
- 浅覆盖区 /
- 浅钻化探样品 /
- 现场分析 /
- 地球化学异常查证 /
- 便携式能量色散X射线荧光光谱仪
Abstract:
A portable Energy Dispersive X-ray Fluorescence Spectrometer(EDXRF) has similar properties to an X-ray Fluorescence Spectrometer in the geological laboratory. EDXRF has a broad application prospect in the mineral exploration and is particularly suitable for in situ analysis at areas with a difficult and long prospecting period. However, further developments of rapid in situ analysis are necessary. A method for rapid determination of Cu, Pb, Zn, As, Mn, Co and Ni by XRF in the field has been proposed. Samples were collected by a vehicle-mounted drilling rig in the shallow overburden areas in the eastern Tianshan area of the Xinjiang Uygur Autonomous Region. Sample powder pellets were pressed manually. The determination limits of the method for Cu, Pb, Zn, As, Mn, Co and Ni are 2, 2, 1.5, 2, 2, 2 and 6μg/g, respectively. The precision(RSD, n=12) is less than 4.7%. This method can be used to analyze geochemical samples. The data of in situ rapid analysis was evaluated by comparing with that obtained from the geological laboratory. The geochemical maps of elements drawn by the two types of analytical data were completely consistent. This method can rapidly analyze geochemical samples in the field, decreasing the time of verification of geochemical anomaly and improving geochemical exploration efficiency.

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图 1 现场分析和实验室测试As、Cu、Pb、Zn地球化学图对比

Figure 1.

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图 2 现场分析和实验室测试Co、Ni、Mn地球化学图对比

Figure 2.

下载: 全尺寸图片幻灯片

图 3 现场分析和实验室测试铜的地球化学异常图对比

Figure 3.

下载: 全尺寸图片幻灯片

表 1 校准样品中各元素的含量范围

Table 1. Concentration of each component in calibration samples

元素	含量范围 (μg/g)	元素	含量范围 (μg/g)
As	0.25~412	Co	1~98
Cu	3.1~390	Ni	2.3~276
Pb	5~636	Mn	28~2490
Zn	7~680

下载: 导出CSV

表 2 方法质量参数

Table 2. Parameters of the method

元素	检出限 (μg/g)	方法精密度		方法准确度
		测定平均值 (μg/g)	RSD (%)	GBW07446		GBW07309
		测定平均值 (μg/g)	RSD (%)	标准值 (μg/g)	本法 (μg/g)	标准值 (μg/g)	本法 (μg/g)
As	2	6.75	4.7	6.2±0.4	7.06	8.4±0.9	8.07
Cu	2	12.52	3.0	12.6±0.6	11.95	32±2	32.99
Pb	2	17.57	3.8	17.4±1.1	17.80	23±3	22.05
Zn	1.5	28.18	1.7	29±2	26.99	78±4	77.05
Co	2	4.76	3.5	5.0±0.2	4.44	14.4±1.2	12.7
Ni	2	9.56	4.3	9.6±0.6	9.23	32±2	34.37
Mn	6	309.07	1.0	309±6	312.1	620±20	619.02

下载: 导出CSV

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