地球化学勘查数据迭代处理的可视化及结果分析  被引量:10

The visualization of iteration processing of geochemical exploration data and an analysis of the result

在线阅读下载全文

作  者:高艳芳[1] 李俊英[2] 陈军威 张玉领 王文君[5] GAO Yan-Fang LI Jun-Ying CHEN Jun-Wei ZHANG Yun-Ling WANG Wen-Jun(Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China No. 11 Geological Party, Hebei Bureau of Geology and Mineral Resources, Xingtai 054000, China Hebei Institute of Geophysical Exploration, Langfang 065000, China Hebei Institute of Geology and Surveying, Langfang 065000, China The Fourth Institute of Geological Exploration, Henan Bureau of Geology and Mineral Development,Zhengzhou 450001, China)

机构地区:[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]河北省地矿局第十一地质大队,河北邢台054000 [3]河北省地球物理勘查院,河北廊坊065000 [4]河北省地质测绘院,河北廊坊065000 [5]河南省地质矿产勘查开发局第四地质勘查院,河南郑州450001

出  处:《物探与化探》2016年第5期1021-1025,共5页Geophysical and Geochemical Exploration

基  金:中国地质调查局地质矿产调查专项"中大比例尺化探数据一体化处理系统研究"(12120113026700)

摘  要:地球化学勘查中,为了获得准确、客观的背景值并由其推断异常下限,需要对不服从正态分布的化探数据进行剔除离群值的迭代处理。为了深入剖析这个较复杂的过程,引用实测数据,利用"特异值检查"迭代自动化功能模块,重点研究了设置不同参数时对结果的影响和取对数迭代结果的可靠性。结果显示:根据化探数据迭代的目的和正态分布的3σ法则,认为xi±k Si中k取3最为合适和合理;利用对数迭代剔除过程获得的异常下限远高于原始数据迭代剔除的结果,这是由于对数的标准离差真值并不是其对应真值的标准离差;此时,可采用真值的几何平均值和真值的标准离差计算异常下限。To get accurate background value and anomaly threshold,it is necessary to iterate abnormally distributed geochemical data for deleting outliers in geochemistry. To analyze deeply the complex iteration procedure,actual data and "outliers check"the authors used iteration procedure to detect the effect of different parameters and reliability of logarithm transformation. Some conclusions have been reached: According to the goal and 3σrule of normal distribution,in xi± kSi,k = 3 is suitable. The higher anomaly threshold of logarithm transformation is not correct and the true value of logarithm standard deviation is not in accord with the standard deviation of the true value,so the the threshold is equal to the sum of geometric mean and standard deviation of the true value.

关 键 词:迭代处理 自动化 可视化 背景值 异常下限 真值 标准离差 

分 类 号:P632[天文地球—地质矿产勘探]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象