黔北普宜地区水系沉积物地球化学特征及成矿预测

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。

Geochemical characteristics of stream sediments and metallogenic prediction in the Puyi area, northern Guizhou Province

In the Puyi area, Guizhou Province an 1:50000 survey of stream sediments was undertaken and their geochemical characteristics were studied to derive metallogenic information. Then the test data of stream sediment samples were processed by mathematical statistics, including multivariate, single-element and combined anomalies. And the singularity method was used to identify metallogenic anomalies. Results show that there are many high-value points of Pb and Zn anomalies with a high dispersion degree. The geochemical and metallogenic geological conditions are superior, implying a good ore-search prospect. Elements F and Li are significantly positively correlated. The content of lithium in the fluorosis area is high, and the concentration and migration of fluorine in groundwater may be inhibited by high content of Li in the geological environment. According to the mineralization information and stratigraphic structure framework, four lead-zinc metallogenic prospective areas are delineated, providing a scientific basis for the analysis of prospecting potential, the study of metallogenic regularity and the prevention and control of endemic fluorosis in the Puyi area.