CAJ | 학술논문

运用局部空间自相关 Moran的 Ii 和G*i 指数，研究8130 km2区域内采集的1∶20万水系沉积物1482个组合样点的空间聚集情况，与基于稳健统计学的地球化学异常下限确定方法所圈定的异常范围对空间聚集范围进行对比。结果表明，局部Ii 指数能够很好地探测出程度较弱和范围较小的空间聚集，局部G*i 指数适合于程度较强和范围大的高高聚集探测，所探测出的空间聚集范围较大。使用该方法所发现的地球化学空间聚集范围和程度符合客观实际，与已知矿床（点）吻合很好。
운용국부공간자상관 Moran적 Ii 화G*i 지수，연구8130 km2구역내채집적1∶20만수계침적물1482개조합양점적공간취집정황，여기우은건통계학적지구화학이상하한학정방법소권정적이상범위대공간취집범위진행대비。결과표명，국부Ii 지수능구흔호지탐측출정도교약화범위교소적공간취집，국부G*i 지수괄합우정도교강화범위대적고고취집탐측，소탐측출적공간취집범위교대。사용해방법소발현적지구화학공간취집범위화정도부합객관실제，여이지광상（점）문합흔호。
Using local Moran's and indexes, the authors studied spatial cluster of 1482 stream sediment samples in a specific area of 8130 km2 on the scale of 1:200000. The comparison of the anomaly range computed by robust statistics with that computed by local spa-tial autocorrelation shows that local Moran's index can well detect relatively weak spatial cluster and small areas while local index is suitable for spatial cluster detection in a strong degree of spatial cluster and large areas. The degree and area of geochemical spatial cluster by using these approaches accord with the objective reality and are in good conformity with known deposits (ore spots).