文献类型：期刊文献

中文题名：低密度元素与高密度元素划分及富集规律分析

英文题名：Division and Enrichment Regularity of Low-Density and High-Density Elements

作者：赵胜利 黄波 杨涛 曹其琛 孙芳芳

第一作者：赵胜利

机构：[1]山东黄金集团国际矿业开发有限公司,济南250000;[2]贵州理工学院资源与环境工程学院,贵阳550003;[3]贵州省有色金属和核工业地质勘查局物化探总队,都匀558000;[4]中国冶金地质总局山东正元地质勘查院,济南250101

第一机构：山东黄金集团国际矿业开发有限公司,济南250000

年份：2021

卷号：41

期号：4

起止页码：656-661

中文期刊名：四川地质学报

外文期刊名：Acta Geologica Sichuan

基金：贵州省科技计划项目“推进贵州地质资料大数据应用产业化研究”(黔科合[2016]支撑2809);贵州理工学院高层次人才科研启动项目(XJGC20161101)共同资助。

语种：中文

中文关键词：高密度元素与低密度元素;划分;富集规律;分析

外文关键词：low-density and high-density elements;division;enrichment regularity;analysis

摘要：本文根据元素在地球中的分配极不均匀性进行低密度和高密度元素划分,低密度元素广泛分布于地球浅部,密度多在2.0~3.0(g/cm^(3))之间的矿物组合,其迁移、分散和富集过程多在外生环境中完成;部分因构造作用,在地球深部形成外生内成矿床,二者均为浅源性低密度元素;部分高密度元素在外生环境的富集与沉积型铝土矿的形成相似(地表岩石接受风化剥蚀形成红土化风化壳,经流水搬运集中于有利环境进行“移硅沉铁富铝”后沉积形成),在形成红土化风化壳过程中富集了数十倍至近千倍,但品位大多不高,形成伴生有用元素,在中大型矿床中具综合利用价值。高密度元素多大于4.0,多富集于下地壳-上地幔之下,其迁移与富集过程多在内生环境形成矿床;部分因构造作用进入外生环境形成内生外成矿床,二者均为高密度深源性矿物组合。而3.0~4.0为低密度和高密度之间的过渡元素,从地球浅部到深部地核均有分布。以上形成了低密度浅源性与高密度元素深源性矿物组合不同的富集规律,对地球化学元素的迁移与富集规律研究具重要意义。
This article divides chemical elements into low-density and high-density elements according to the extremely uneven distribution of elements in the earth.The low-density elements are widely distributed in the shallow part of the earth.The density of their mineral assemblages is mostly between 2.0 g/cm^(3)and 3.0 g/cm^(3).Their migration,dispersion and enrichment processes are mostly completed in the exogenous environment.A part of the low-density elements form exogenetic and endogenic deposits in the deep part of the earth due to tectonics.Both of them are shallow-source low-density elements.The enrichment of some high-density elements in the exogenous environment is similar to the formation of sedimentary bauxite(Surface rocks undergo weathering and denudation,forming a laterite weathering crust,which is transported by flowing water and concentrated in a favorable environment for"moving silicon,sinking iron and rich aluminum"and then depositing).In the process of forming laterite weathering crust,they are tens to thousands of times richer,but only as associated useful elements in some medium and large deposits.The density of mineral assemblages of high-density elements are mostly greater than 4.0 g/cm^(3),and they are mostly concentrated under the lower crust-upper mantle.Their migration and enrichment processes are mostly in the endogenous environment,forming deposits;some of them enter the exogenous environment due to tectonic processes to form endogenous and exogenous deposits.Both of them are high-density deep-source mineral associations.3.0-4.0 g/cm^(3) is density of mineral assemblages of the transition elements between low-density and high-density which are distributed from the shallow part of the earth to the deep core.The above has formed the different enrichment regularity of low-density shallow-source minerals and high-density deep-source minerals,which is of great significance to the study of the migration and enrichment regularity of geochemical elements.