摘要
萤石特殊的地球化学属性使其成为稀土元素(REE)的天然载体,其REE配分模式可有效记录成矿流体的演化轨迹。本文对萤石REE地球化学示踪技术进行综述,重点阐释特征参数组合(∑REE、LREE/HREE、Y/Ho、δEu-δCe异常及Tb/Ca-Tb/La判别图解)的地质解译路径。通过REE配分模式解耦,构建矿质运移-沉淀过程的元素分馏模型;基于REE络合行为差异,反演热液体系的物理化学条件(温度/pH/盐度)演变;结合典型参数场域分析,建立矿床成因类型判别矩阵。研究提出多参数联合反演技术框架,为萤石找矿预测提供地球化学依据,对实施新一轮找矿突破战略具有方法论指导意义。
The unique geochemical properties of fluorite make it a natural carrier of rare earth elements(REEs).Its REE distribution patterns can effectively record the evolutionary processes of ore-forming fluids.This paper reviews the REE geochemical tracing techniques for fluorite,with a focus on explaining the geological interpretation pathways of characteristic parameter combinations,including total REE content(∑REE),LREE/HREE ratio,Y/Ho ratio,δEu-δCe anomalies,and Tb/Ca-Tb/La discriminant diagrams.Through decoupling REE distribution patterns,an element fractionation model for ore material migration-precipitation processes is constructed.Based on differences in REE complexation behaviors,we invert the evolution of physicochemical conditions(temperature/pH/salinity)in hydrothermal systems.Combined with spatial field analysis of typical parameters,a discriminant matrix for genetic types of ore deposits is established.This study proposes a technical framework for multi-parameter joint inversion,providing a geochemical basis for fluorite prospecting prediction and offering methodological guidance for implementing the new round of prospecting breakthrough strategy.
作者
刘永
Liu Yong(Zhejiang Geological Prospecting Institute of China Chemical Geology and Mine Bureau,Hangzhou,Zhejiang,310002,China)
出处
《化工矿产地质》
2025年第3期213-218,共6页
Geology of Chemical Minerals
关键词
萤石矿
成因研究
稀土元素
地球化学特征
地质意义
Fluorite
Genetic research
Rare earth element(REE)
Geochemical characteristics
Geological significance
