地质与勘探2018，Vol.54Issue(2)：315-324,10.
基于水系流域的地球化学异常分析方法——以1:50000丫他幅水系沉积物分析为例
A Geochemical Anomaly Analysis Method Based on River Basins:An Example of the Yata Area
摘要
Abstract
Regional geochemical anomaly evaluation is a major problem that exploration geochemistry has long been facing. Now several conventional methods are commonly used for the evaluation,such as the geological-tectonic unit evaluation and multi-element quantifying index. These methods do not limit the source areas of sediments in river basins, and thus can not achieve good results. In general these sediments result from weathering,erosion and transport of rocks. So the provenances of them are identical with the river basin. In this paper,using the watershed as the unit,the geochemical anomalies are analyzed for the Yaya area on a scale 1:50,000.Comparison with the known mineral resources shows this method is effective.It can reduce the extent of geochemical anomalies and determine the target more accurately.Based on this approach,this work characterizes the geochemical elements of the water-shed where ore spots have been discovered,and the existing gold deposits in the Yata area are divided into two categories,which will be able to guide the further ore-search efforts.关键词
流域提取/累频归一化/水系沉积物/地球化学异常/丫他金矿Key words
watershed extraction/cumulative frequency normalization/stream sediment/geochemical anomaly analysis/Yata area分类
天文与地球科学引用本文复制引用
廖国忠,张伟,梁生贤,吴文贤..基于水系流域的地球化学异常分析方法——以1:50000丫他幅水系沉积物分析为例[J].地质与勘探,2018,54(2):315-324,10.基金项目
中国地质调查局地质矿产调查专项项目(编号:DD20160020)资助. （编号:DD20160020）
