黔北普宜地区水系沉积物地球化学特征及成矿预测  

Geochemical Characteristics of Stream Sediments and Metallogenic Prediction in the Puyi Area of North Guizhou Province

作　　者：张七道 肖长源 李致伟 刘西峰 ZHANG Qidao;XIAO Changyuan;LI Zhiwei;LIU Xifeng(Kunming Comprehensive Natural Resources Survey Center,China Geological Survey,Kunming,Yunnan 650111;China University of Geosciences,Wuhan,Hubei 430074)

机构地区：[1]中国地质调查局昆明自然资源综合调查中心,云南昆明650111 [2]中国地质大学(武汉),湖北武汉430074

出　　处：《地质与勘探》2021年第5期1040-1052,共13页Geology and Exploration

基　　金：中国地质调查局项目(编号:DD20191012)资助。

摘　　要：通过黔北普宜地区开展1∶5万水系沉积物测量工作,对研究区的地球化学特征进行初步研究,以获取成矿信息。对水系沉积物样品分析结果进行数理统计,运用成矿元素地球化学特征进行多元统计分析、单元素及组合异常分析,并运用奇异性分析方法对成矿异常进行识别。分析结果表明,Pb、Zn元素异常高值点较多、离散程度较高,地球化学和成矿地质条件优越,具有较好找矿前景。F与Li元素为显著正相关关系,氟病区锂的含量高,地质环境中含量较高的Li对地下水中氟的浓聚迁移可能有抑制作用。综合研究区已知矿化信息及地层构造格架,优选出铅锌成矿远景区4处,为普宜地区找矿潜力分析、成矿规律研究及地氟病预防治理提供科学依据。Based on the survey of 1∶50000 stream sediments in the Puyi area of north Guizhou Province,the geochemical characteristics of the study area were preliminarily studied,and the metallogenic information was obtained.The analysis results of stream sediment samples are analyzed by mathematical statistics.The geochemical characteristics of ore-forming elements are used for multivariate statistical analysis,single element and combined anomaly analysis.The singularity analysis method is used to identify the metallogenic anomaly.The analysis results show that there are many high value points of Pb and Zn anomalies with high dispersion degree.The geochemical and metallogenic geological conditions are superior,which has a good prospecting prospect.There is a significant positive correlation between F and Li.The content of lithium in fluorosis area is high,and the concentration and migration of fluorine in groundwater may be inhibited by high content of Li in geological environment.According to the known mineralization information and stratigraphic structure framework,four lead-zinc metallogenic prospective areas are selected.It provides a scientific basis for the analysis of prospecting potential,the study of metallogenic regularity and the prevention and control of endemic fluorosis in Puyi area.

关 键 词：水系沉积物 地球化学特征 成矿远景区 地氟病 普宜地区 黔北 

分 类 号：P618[天文地球—矿床学]