地球化学测量数据整合方法的探索

The exploration study on integration method of geochemical survey data

不同来源的地球化学数据综合利用中,数据整合为工作基础,采用不同的整合方法,对后续开展数理统计、图件制作及成矿预测等方面会产生不同影响。文章以“哈日扎地区”所属1∶5万标准图幅水系沉积物测量数据和其所包含的4个1∶2.5万标准图幅的地球化学测量数据作为基础,提出“汇水域网格均值法”,并通过数据统计、图件编制等,从“数据真实程度-数据台阶(拼接痕迹)-成图效果-信息反映程度”等方面与传统的常规拼接法、离散网格数据法、标准网格均值法展开对比,认为“汇水域网格均值法”虽然仍存在一定问题,但成图效果更佳,信息反映更全,在使用方面能够实现全域一张图的设想,在数据量较大、数据来源较多、数据间偏差较大的综合研究中,其作用更加明显。

In the comprehensive utilization of geochemical data from different sources,data integration is the basis of the work,and different integration methods will have different influences on the subsequent development of mathematical statistical,geological mapping making and metallogenic prediction work.Based on the stream sedimentary survey data of a 1∶50000 standard map and the geochemical survey data of four 1∶25000 standard maps in Harizha area,this paper has proposed the"integrated stream area grid mean method".Through the data statistical work,map compilation,etc.,data reality degree-data step(stitching trace)-mapping effect-information reflection degree,are compared with those from the traditional conventional stitching method,discrete grid data method,standard grid mean value method.It is considered that although there are still some problems with"integrated stream area grid mean method",however,the mapping effect is better,the information reflection is more comprehensive,and the method can realize the assumption of one map in the whole area for the aspect of use.Its role is more obvious in the comprehensive research with large data volume,multiple data sources and large deviation between data.