Methods For Determination of the Lower Geochemical Anomaly Limit and the Rationality Discussion
详细信息
- 责任者：Yao Tao (State Key Laboratory of Geo-Processes and Mineral Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Chen Shouyu
- 刊名：Contributions to Geology and Mineral Resources Research
- 出版年：2011
- 卷期：26(1)
- 关键词：地球化学异常下限 ; geochemical threshold ; 金属矿 ; metal ores ; 甘肃 ; Gansu Province
- 页码：p.96-101
- 图表：4 illus., 1 table, 12 refs.
- 分类号：1500
- issnNo：ISSN1001-1412
- isbnNo：CN12-1131/P
摘要
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.