华南地质2025，Vol.41Issue(3)：558-570,13.DOI:10.3969/j.issn.2097-0013.2025.03.007
幕阜山地区1∶5万水系沉积物稀有金属地球化学低弱异常提取方法
An Extraction Method for Weak Geochemical Anomalies of Rare Metal Elements from 1:50,000 Stream Sediments in the Mufushan Area,Central China
摘要
Abstract
In geochemical mineral exploration,it is difficult to extract anomalous information of rare matal elements as their characteristics of low dispersion and close affinity,and their are limintations of varying degrees in traditional methods for anomalous information extraction.This article takes the Mufushan area,which has made significant breakthroughs in mineral exploration work in recent years,as an example to explore a new method for extracting low and weak anomalous information of rare metal elements.Based on a total of 984 samples of 1:50,000 stream sediments in the Chenjiaduan Unit in the Mufushan area,this study analyzed the geochemical parameter characteristics of elements Li,Be,Nb,and Ta,and determined that the enrichment of these four elements was not obvious and they were belonged to weak anomalies.Based on methods of content arrangement and trend surface,this study optimized the data processing process.It fits a quadratic trend surface to the original data,and then uses the content arrangement method to extract anomalies of residuals between the original data and the trend surface.Compared with the content arrangement and iterative methods,the optimized method is much better to extract weak geochemical anomalies of rare metal elements.It reduced large-area anomalies in high-background areas of elements and strengthened anomalies in low-background areas.The optimized method is more effective for extracting low and weak anomaly information of rare metal elements.关键词
稀有金属/水系沉积物/地球化学异常/弱异常信息提取/幕阜山地区Key words
rare metals/stream sediments/geochemical anomaly/weak information extraction/the Mufushan area分类
地质学引用本文复制引用
冯佳鑫,李艳军,冷双梁,杨紫文,卢亚鑫..幕阜山地区1∶5万水系沉积物稀有金属地球化学低弱异常提取方法[J].华南地质,2025,41(3):558-570,13.基金项目
湖北省地质局项目(KJ2022-48)和中国地质大学(武汉)资源学院2023年度"寻找李四光"专项基金资助计划 （KJ2022-48）
