江西武山块状硫化物矿石表生风化过程中稀土元素地球化学行为  

Behavior of Rare Earth Elements during Weathering of Sulphide at Wushan Copper Mine,Jiangxi Province,China

作　　者：李伟强[1] 顾连兴[1] 唐俊华[1] 郑远川[1] 吴昌志[1] 

机构地区：[1]内生金属矿床成矿机制研究国家重点实验室南京大学地球科学系,江苏南京210093

出　　处：《中国稀土学报》2006年第3期350-356,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目(40234051和40221301)

摘　　要：以江西武山铜矿为例,研究了硫化物矿石在氧化过程中稀土元素的地球化学行为。硫化物在氧化成为铁帽的过程中,稀土元素的迁移能力不强,大部分停留在硫化物矿石的氧化残余物中。在这个过程中,稀土元素的模式发生了系统的改变:铁帽的轻重稀土比值低于原生硫化物矿石的轻重稀土比值;铁帽中出现了Ce的负异常。硫化物矿石在氧化成为铁帽的过程中,Eu异常基本没有发生改变。The behavior of REE during the sulphide weathering is still poorly understood, although REE geochemistry during weathering of igneous rocks has been well documented, in this study, the REE contents of primary sulphide and their weathering products （gossan） of the Wushan copper mine were investigated. The mobility of REE in the weathering profile of sulphide is limited, with the majority of REE retained in the gossans. However, REE are fractionated in the weathering process, with HREE relatively enriched in the gossan samples. Ce is depleted in the gossan, whereas the difference of Eu anomaly of the gossan and primitive sulphide is neglectable.

关 键 词：硫化物 铁帽 表生风化 稀土 

分 类 号：P618.41[天文地球—矿床学] P595[天文地球—地质学]