| 陈健.EDA异常下限分析在地质找矿中的应用[J].矿产勘查,2019,(8):1961-1966 |
| EDA异常下限分析在地质找矿中的应用 |
| Application of EDA Abnormal Lower Limit Analysis in Geological Prospecting |
| 投稿时间：2018-12-27 |
| DOI： |
| 中文关键词: 多元统计 地球化学特征 EDA技术 都兰县 青海省 |
| 英文关键词: multivariate statistics,geochemical characteristics,EDA technology,Dulan County,Qinghai Province |
| 基金项目:青海省有色地质矿产勘查局基金项目(编号:青色地[2016]148号)资助。 |
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| 中文摘要: |
| 地球化学数据不服从正态分布,甚至数据作对数转换也不服从正态分布时,不宜用传统统计方法进行异常下限确定。笔者采用青海省马里木吾卡地区1∶2.5万地球化学数据,应用EDA地球化学异常下限确定方法,具有简单、快捷和稳定的特点,不要求数据服从正态分布。运用EDA箱线图,对地球化学元素在全区的数据分布状况进行分析,重在异常下限的提取和对比分析。通过对比分析研究EDA异常下限确定方法与传统统计方法的优缺点,运用该方法圈定的化探异常比较符合客观实际,异常面积大,与地质背景吻合好。 |
| 英文摘要: |
| Geochemical data does not obey the normal distribution.Even when the logarithmically transformed data does not obey the normal distribution,it is not appropriate to use the traditional statistical method to determine the lower limit of the abnormality.The author uses the 1∶2.5 geochemical data of the Malimuwka area in Qinghai Province,and uses the EDA geochemical anomaly lower limit determination method,which is simple,fast and stable,and does not require the data to follow a normal distribution.Using the EDA box plot,the data distribution of geochemical elements in the whole region is analyzed,focusing on the extraction and comparative analysis of the lower limit of abnormality.Through comparative analysis, the advantages and disadvantages of the EDA abnormal lower limit determination method and the traditional statistical method are studied.The geochemical anomalies delineated by this method are in line with objective reality,and the abnormal area is large,which is in good agreement with the geological background. |
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