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A tentative discussion on some problems in geochemical survey of stream sediments |
Zheng-Chang WU, Hui-Min WANG, Jun-Jie JIANG, Jun-Ling YAN, Bai-Qiu LI |
Jiangxi Institute of Geological Survey, Nanchang 330030, China |
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Abstract As a main and important method in regional geological survey, geochemical survey can not only offer theoretical guidance or inference based geological evidence but also provide direct evidence for mineral resources. The technology was implemented in two periods of specification guidance, i.e., DZ/T 0011-91, DZ/T 0011-2015. In this study, the authors find that there exist some differences in the key links of sample collection, analysis, test and data interpretation in different periods and different working processes by different workers, and hence the results might fail to fully reflect the geochemical information. The authors believe that the real and effective sampling (sample representation), accurate data testing (reliability of results), and scientific interpretation of prediction constitute the key to geochemical survey work.
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Received: 26 November 2017
Published: 24 October 2018
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规范 | 标准样 | 重复样 | 内部监控样 (重复性检验) | 外部监控样 | 外部密码 抽查 | 方法准确度 | 方法精密度 | 91版(1∶5万) | Δlg、RE | RSD(C为平均值) | 未交待 | RD* | | RD* | 94版(1∶5万) | Δlg、RE | RSD(C为平均值) | RD* | XL、λ | | RD* | 95版(1∶20万) | Δlg、RE | RSD(C为平均值) | 未交待 | RD | | RD | 2006版(1∶20万) | Δlg、RE | RSD(C为标准值) | RD* | RD* | 国标样控制多参数 | | 2015版(1∶5万) | Δlg | RSD(C为标准值) | RD | RD | 国标样控制多参数 | | 2017版(1∶5万) | Δlg | RSD(C为标准值) | RD | RD | 国标样控制多参数 | | 本文建议 | Δlg | RSD(C为标准值) | RE | RD | 国标样控制多参数 | RD |
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