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| The development and application of Au element analysis box for field geological samples |
| Wei ZHANG1,2, Yong-Hua WANG1, Guo-Zhong LIAO1 |
1. Chengdu Center of China Geological Survey, Chengdu 610082, China
2. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China |
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Abstract At present, the dilemma of long sample testing cycle, waiting and prompting reports is a common phenomenon. In the past three years, the mineral geological survey project in southwestern Guizhou Province mainly focused on Carlin-type gold deposits, and the project team introduced visual colorimetry which was proposed in the 1990s.Through repeated comparative tests, part of the method was improved and equipment was upgraded, then a set of integrated analysis box was developed, which is convenient for field transportation and use. Compared with the test results of the same samples in the laboratory, it is shown that the performance indicators can meet the needs of rapid qualitative judgment such as detection limit and test accuracy. These results prove that this means can effectively assist the frontline geologists in timely judging the newly discovered mineralization phenomena and new ore spots in the field investigation process, thus improving the effectiveness in gold prospecting work.
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Received: 15 July 2019
Published: 22 April 2020
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Photographs of “Colorimetric” Result in 1∶50,000 Mine Survey Area of a Carlin-type Gold Mine in the Southwest of Guizhou province
Note: No.1~25 is the sample to be tested, No.26~30 is the known standard sample(The contents of samples 26,27,28 and 29 are 0,20×10-9,50×10-9 and 80×10-9). When TMK is added, No. 11, 12, 15, 20, 21 and 24 begin to turn red. The higher the concentration of red, the higher the corresponding gold content.
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Test flow chart
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已知标准样的金
元素含量 | 需称取标准样的质量
(GBW 07230) | | 10×10-9(0.01 g/t) | 0.075 g | | 20×10-9(0.02 g/t) | 0.150 g | | 50×10-9(0.05 g/t) | 0.376 g | | 80×10-9(0.08 g/t) | 0.602 g | | 100×10-9(0.1 g/t) | 0.752 g | | 200×10-9(0.2 g/t) | 1.503 g | | 500×10-9(0.5 g/t) | 3.759 g | | 800×10-9(0.8 g/t) | 6.015 g | | 1×10-6(1.0 g/t) | 7.519 g | | 2×10-6(2.0 g/t) | 15.038 g | | 5×10-6(5.0 g/t) | 37.594 g |
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Table for weighing standard sample
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| 序号 | 样品编号 | 比色法定
性测试 | 试验室
测试 | 定性
准确 | | 1 | D001-H1 | <10×10-9 | 0.816 | 是 | | 2 | D001-H2 | <10×10-9 | 1.11 | 是 | | 3 | D001-H3 | <10×10-9 | 0.758 | 是 | | 4 | D001-H4 | <10×10-9 | 1.3255 | 是 | | 5 | D001-H5 | <10×10-9 | 1.075 | 是 | | 6 | D001-H6 | <10×10-9 | 0.49 | 是 | | 7 | D001-H8 | <10×10-9 | 1.124 | 是 | | 8 | D002-H2-1 | <10×10-9 | 1.191 | 是 | | 9 | D002-H2-2 | <10×10-9 | 0.915 | 是 | | 10 | D002-H3 | <10×10-9b | 0.768 | 是 | | 11 | D006-H1 | <10×10-9 | 1.181 | 是 | | 12 | D006-H2 | <10×10-9 | 0.434 | 是 | | 13 | D007-H1 | <10×10-9 | 0.685 | 是 | | 14 | D007-H2 | <10×10-9 | 0.561 | 是 | | 15 | D007-H3 | <10×10-9 | 0.53 | 是 |
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Statistical table of test results and qualitative accuracy for the same batch of samples
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Comprehensive map of NaSheng gold prospecting target area in Maling
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