赣南清溪离子吸附型稀土矿元素迁移富集特征研究  

Research of Elements′Migration and Enrichment Characteristics of Ion-adsorption Type REE Deposits in Southern Jiangxi Province

作　　者：谢明君 周建[2] 王学求[2] 漆富勇[3] 张必敏[2] 吴慧 刘东盛[2] 刘昱恒 刘福田[1,2] Xie Mingjun;Zhou Jian;Wang Xueqiu;Qi Fuyong;Zhang Bimin;Wu Hui;Liu Dongsheng;Liu Yuheng;Liu Futian(School of Earth Science and Resources,Chang'an University,Xi'an 710054,China;Key Laboratory of Geochemical Exploration,Institute of Geophysical and Geochem-ical Exploration,Langfang 065000,China;Geology and Mineral Exploration and Development Bureau of Jiangxi Province,Geological Investigation Brigade of Southern Jiangxi Province,Ganzhou 341000,China)

机构地区：[1]长安大学地球科学与资源学院,陕西西安710054 [2]中国地质科学院地球物理地球化学勘查研究所,自然资源部地球化学探测重点实验室,河北廊坊065000 [3]江西省地质矿产勘查开发局,赣南地质调查大队,江西赣州341000

出　　处：《中国稀土学报》2022年第4期697-710,共14页Journal of the Chinese Society of Rare Earths

基　　金：中国地质调查局地质调查项目(DD20190451);“全球地球化学填图计划”项目(121201108000150005);中国地质科学院基本科研业务费项目(AS2012J01,JYYWF20182401)资助。

摘　　要：离子吸附型稀土矿床是中国特有的稀土资源。对这一类型矿床及周边的地质环境,风化壳中稀土进行研究具有较高的产学研价值。本文通过对中国赣南典型稀土矿区花岗岩风化壳进行元素地球化学分析,并结合相关地球化学参数与图解,结果表明:研究区成矿花岗岩风化壳形成于强化学风化条件,发育成熟度高,处于晚期去Si阶段;稀土元素地球化学参数显示,风化壳整体的稀土配分特征主要继承于成矿母岩;稀土元素主要以离子交换态在风化剖面中迁移,并受pH值、微生物活动、氧化还原条件等多种因素控制。Ion-adsorption type REEs deposits are unique REEs resources in China.It is of great value to study the REEs in the weathering crust of this type of deposit and its regional geological settings.Based on the ele⁃ment geochemical analysis of the weathering crust of granites in the typical REEs mining area of Southern Ji⁃angxi Province,and combined with the relevant geochemical parameters and diagrams,the results showed that the weathering crust of granites in the study area was formed under the condition of strong chemical weathering,with high maturity and in the advanced stage of desilication.The geochemical parameters of the REEs show that the REEs distribution characteristics of the weathering crust are mainly inherited from the ore-forming parent rocks.REEs mainly migrate in the weathering profile in the form of ion-exchangeable fraction,and are con⁃trolled by pH value,microbial activity,redox conditions and other factors.

关 键 词：离子吸附型稀土矿床 风化过程 稀土元素 迁移富集规律 清溪 

分 类 号：P618.7[天文地球—矿床学] P595[天文地球—地质学]