Recognition and Extraction of Geochemical Weak Anomalies Based on Multiple Geochemical Background

详细信息   

• 责任者：Zhang Yan (Department of Earth Sciences ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Zhou Yongzhang
• 刊名：Geochimica
• 出版年：2012
• 卷期：41(3)
• 关键词：地球化学背景 ; geochemical background ; 地球化学异常 ; geochemical anomaly ; 广东 ; Guangdong
• 页码：p.278-291
• 图表：2 illus., 35 refs.
• 分类号：1500
• issnNo：ISSN0379-1726
• isbnNo：CN44-1398/P

摘要

Concentration-area method is applied to caculate lower limit of anomalous values and obtain abnormal maps for major elements in Pangxidong area, Qinzhou-Hangzhou tectonic joint belt. The known deposits are consistent with the anomalous area when analyzed with overlay method. The unknown mineral deposits can be predicted according to the anomalous area in the study region, providing usefull method for mineral resource potential evaluation. A fractal filtering technology are used to extract ore-forming anomaly from complicated geochemical backgrounds. The fractal filtering technology method can extract mineralization areas related to local anomalies on the basis of the concentration-area method, revealing the regional anomaly and reflect the multiple geochemical background. The fractal filtering method can effectively enhance the weak abnormal analyses, extract the ore-forming anomalies, and help exploring concealed orebody in Pangxidong area.