贵州织金新华含稀土磷矿床稀土元素地球化学研究  

REE GEOCHEMISTRY OF THE XINHUA REE-BEARING PHOSPHORUS DEPOSIT, ZHIJIN COUNTY, GUIZHOU PROVINCE

作　　者：张杰[1] 张覃[1] 陈代良 

机构地区：[1]贵州工业大学资源与环境学院,贵阳550003 [2]贵州化工地质勘察院,遵义563000

出　　处：《地质与勘探》2004年第1期41-44,共4页Geology and Exploration

基　　金：国家自然科学基金项目(编号:50164001)资助。

摘　　要：对贵州织金新华含稀土磷矿床进行的稀土元素及微量元素分析结果表明,磷块岩中普遍富集稀土元素,含稀土总量∑REE较高,并富集Y、La、Nd等重稀土及轻稀土元素。LREE/HREE比值较高,但低于上部围岩之值。含稀土磷块岩普遍具Ce的负异常,显示其对源区的继承性,也指示成磷环境处于氧化程度相对较高状态。稀土元素球粒陨石标准化模式曲线、北美页岩标准化模式曲线、Ce元素异常、LREE/HREE比值、微量元素特征及岩石矿物特征表明,织金新华含稀土磷矿床具以正常海相生物-化学沉积等为主伴有海相热水沉积混合成因的特征。文中讨论了含稀土磷块岩氧化矿石中稀土元素的迁移富集规律及特征。Analytical results of REE and trace elements in Xinhua phosphorus deposit, Zhilin county, Guizhou province show that phosphorite ores are rich in ∑REE concentration. The phosphorite has quite abundant Y, La, and Nd content. The LREE/HREE ratio in ores is higher, and less than in wallrocks of top roof. REE-bearing phosphorite has Ce anomaly, showing succession of original region and high oxidation environment during phosphorite formation. The chondrite-normalized and NASC-normalized REE patterns, Ce anomaly, LREE/HREE ratio, trace element characters and mineral and rock composition show that Xinhua phosphorus deposit has characters of normal marine biological-chemical sediments, accompanied by mixing of hot seawater sediments. Regularity and characters of REE transportation and enrichment in oxidizing zone of phosphorite have also been discussed.

关 键 词：稀土元素 地球化学 磷矿床 贵州 

分 类 号：P618.7[天文地球—矿床学] P595[天文地球—地质学]