CAJ | 학술논문

区域化探原生背景与异常形成于相互独立的地质过程。在岩性复杂区，不同地质单元内背景与异常的成因可能完全不同，划定统一的背景上限显然是不科学的，合理的解决方案是分区确定化探背景上限。这里提出一种采用主要造岩元素为指标，采用快速聚类分析方法划分地质单元并分别计算背景上限的简便方法。以1：200000郴县幅化探数据为例进行试验，结果表明，该方法能有效地去除不同地质体类型背景对异常的影响，不仅能突出矿区异常，也能削弱高背景区非矿致异常，缩小靶区面积，识别微弱异常。
구역화탐원생배경여이상형성우상호독립적지질과정。재암성복잡구，불동지질단원내배경여이상적성인가능완전불동，화정통일적배경상한현연시불과학적，합리적해결방안시분구학정화탐배경상한。저리제출일충채용주요조암원소위지표，채용쾌속취류분석방법화분지질단원병분별계산배경상한적간편방법。이1：200000침현폭화탐수거위례진행시험，결과표명，해방법능유효지거제불동지질체류형배경대이상적영향，불부능돌출광구이상，야능삭약고배경구비광치이상，축소파구면적，식별미약이상。
Primary background and anomaly of regional geochemical exploration formed in independent geological processes. The causes of background and anomaly of different geological unit in complex lithology distract are completely different,so it is unreasonable to delineate the same upper limit of geochemical background.Reasonable solution is to determine the upper limit of geochemical background by subregion.A simple method of subregion determine of upper limit of geochemical background u-sing K-Means cluster analysis,which uses main rock-forming elements as indicator,was presented.A test was progressed using geochemical data of 1:200 000 Chenxian geological map,the results show that this method can effectively remove impact of different geological unit anomalies,and it can not only highlight the mine anomalies but also weaken the non-mining anoma-lies in high background areas,narrow target area and identify weak anomalies.