摘要
地球化学异常下限的确定对于圈定有利的成矿带,指导找矿非常关键。文章以甘肃省白银市白银矿区及外围水系沉积物Cu,Pb,Zn,Ag等4个元素为例,分别运用传统方法、归一化法和分形方法对数据进行处理。将3种方法圈定的异常进行比较发现:传统方法圈出的异常有限,主要是在矿区出现异常;而归一化法可以圈出更多的异常,并且与矿化集中区吻合较好,但还是会漏掉弱异常;分形方法圈出的异常更客观,与已知矿化集中区吻合最好,异常范围大,对弱小异常的识别也比较理想。
Determination of lower limit for geochemical anomaly is the key to delineate geochemical anomalies and favorable metallogenic belt and guide prospecting.If threshold is too high weak anomalies will be missed and too low resulting in exaggerating of anomalies.River sediment Cu,Pb,Zn,Ag data from Baiyin Mine Area and surroundings,Baiyin city,Gansu Province are processed with traditional methods showing anomalies mainly limited in the mine area and normalization method showing more anomalies and better coincidence with the mineralization-concentrated areas but missing the weak anomalies and fractal method showing more objective anomalies and weak anomalies and best coincidence with the mineralization-concentrated areas.
出处
《地质找矿论丛》
CAS
CSCD
2011年第1期96-101,共6页
Contributions to Geology and Mineral Resources Research
基金
甘肃省国土资源厅项目(编号:2009026074)资助
关键词
地球化学
异常下限
归一化
分形
白银矿区
甘肃省
geochemistry
anomaly lower threshold
normalized
fractal
Baiyin mine
Gansu province
