韶关市始兴县丝鱼坑矿区化探异常评价方法探讨

Study on geochemical anomaly evaluation method of Siyukeng district in Shaoguan City

通过对丝鱼坑工作区开展1∶2.5万土壤化探扫面,土壤样重新采集、岩石样采集、蚀变样采集,并对数据进行分析对比,对矿区圈定的化探异常进行逐一筛选,发现含矿蚀变破碎带,为下一步进行矿脉的地表追索和深部验证提供了目标体。这套工作方法的关键环节是:勘查区化探扫面发现异常,土壤样重新采集排除假异常,岩石样采集识别最有价值的异常,蚀变样采集发现含矿地质体几个方面。这个过程体现了对热液矿床成矿过程的认识和不同元素在不同环境下的地球化学行为的差异作用,以及对化探分析数据的精细化对比。这个分析过程体现了将地质成矿作用分析与地球化学异常特征分析相结合的工作理念。

Work by geochemical surface soil survey for 1∶25 000 scale,data comparing among the information of resampling soils,normal rocks and alterated rocks and filtrating to geochemical anomaly in Siyukeng district,the ore alterated fracture zone which can be next exploration target for ore vein tracing and deep verifying has been found.The key steps link of this working method are：find anomaly by regional geochemical soil survey,eliminate false anomaly,find out most valuable anomaly of rock survey and point out ore-bearing geological body by alterated rock survey.The work relates to understand the mineralization process of hydrothermal deposit and the difference of geochemical behavior of different elements in different environments,the detailed comparison of geochemical data and the working idea of combining geological mineralization analysis with geochemical anomaly analysis.