文献类型：期刊文献

中文题名：铁同位素对黔西南晴隆沙子红土型独立钪矿床成矿过程的约束

英文题名：Iron isotope constraint on the mineralization process of the Shazi laterite-type independent scandium deposit in Qilong, Guizhou Province, China

作者：孙军 刘云龙 唐勇

第一作者：孙军

机构：[1]贵州理工学院资源与环境工程学院,贵州贵阳550003;[2]贵州财经大学管理科学学院,贵州贵阳550025;[3]中国科学院地球化学研究所地球内部物质高温高压重点实验室,贵州贵阳550081

第一机构：贵州理工学院资源与环境工程学院

年份：2020

期号：3

起止页码：323-329

中文期刊名：矿物学报

外文期刊名：Acta Mineralogica Sinica

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金项目(批准号:41262005,41773053);贵州理工学院高层次人才启动项目(编号:No.XJGC20190954);全国高校黄大年式教师团队(编号:教师函〔2018〕1号);贵州省重点学科(编号:ZDXK[2018]001);贵州省人才基地(编号:RCJD2018-3);贵州省教育厅创新人才团队(编号:黔教合人才团队字[2015]56号);贵州省教育厅特色重点实验室(编号:黔教合KY字[2018]486号])

语种：中文

中文关键词：晴隆;钪矿床;铁同位素;峨眉山玄武岩

外文关键词：Qinglong;scandium deposit;iron isotope;Emeishan basalt

摘要：贵州晴隆沙子矿床是近年来我国的发现1处大型独立钪矿床,本文对矿区新鲜玄武岩、风化玄武岩及矿化红土中磁铁矿铁同位素组成进行研究。结果表明,新鲜玄武岩和风化玄武岩的w(Fe2O3)分别变化在15.41%~15.51%和14.60%~15.12%的范围内,而磁铁矿δ56Fe的变化范围分别为0.23‰~0.29‰和0.02‰~0.07‰。红土具有最高的铁含量,w(Fe2O3)在23.53%~28.95%的范围内,但δ56Fe与风化玄武岩相差不大,变化范围在-0.09‰~0.03‰之间。风化玄武岩和红土中铁同位素组成的变化,与单斜辉石的水解有关。结合已有的研究成果,认为沙子钪矿的成因与峨眉山玄武岩的深部原位水解和地表风化淋滤有关。
The Shazi deposit,located in Qinglong County of Guizhou Province,is a newly discovered large-scale independent scandium deposit.The iron isotopic compositions of magnetites in fresh basalt,weathered basalt,and mineralized laterite samples have been analyzed.The Fe2O3 contents of fresh basalt and weathered basalt samples vary from 15.41%to 15.51%and from 14.60%to 15.12%,respectively.Theδ56 Fe values of magnetites of fresh basalt and weathered basalt samples vary from 0.23‰to 0.29‰and from 0.02‰to 0.07‰,respectively.Laterite has the highest Fe2O3 contents ranging from 23.53%to28.95%,but theδ56 Fe values,ranging from-0.09‰to 0.03‰,of magnetites in laterite samples have no big difference to those of magnetites from weathered basalt samples.The change of iron isotopic compositions of magnetites in weathered basalt and laterite samples could be related to the hydrolysis of clinopyroxene.Combined with the existing research results,it is considered that the genesis of scandium mineralization could be related to the deep in-situ hydrolysis and the surficial weathering and leaching of the Emeishan basalt.