| 雷源保,赖健清,陈随,安江华.铜陵凤凰山铜多金属矿磁铁矿单矿物稀土元素特征研究[J].地质找矿论丛,2011,26(4):367-372 |
| 铜陵凤凰山铜多金属矿磁铁矿单矿物稀土元素特征研究 |
| On characteristics of rare earth elements in magnetite monomineral from the Fenghuangshan copper polymetallic deposit,Tongling,Anhui |
| 投稿时间：2010-07-01 |
| DOI：10.6053/j.issn.1001-1412.2011.4. 002 |
| 中文关键词: 稀土元素 磁铁矿 氧化还原电位 部分熔融 凤凰山铜矿 安徽省 |
| 英文关键词:rare earth elements magnetite redox potential partial melting Fenghuangshan copper deposit Anhui province |
| 基金项目:国家“十一五”科技支撑项目“铜陵地区危机铜矿山大比例尺定位预测技术开发”课题(编号:2006BAB01B07);中南大学国家创新性实验计划项目的资助 |
|
| 摘要点击次数: 1037 |
| 全文下载次数: 1696 |
| 中文摘要: |
| 通过对铜陵凤凰山铜多金属矿不同部位的磁铁矿单矿物的稀土元素配分分析,发现从矿体的底板经过中部到顶板,磁铁矿中稀土元素总量平均值不断升高,依次为11.30×10-6,29.34×10-6和86.15×10-6,δ(Eu)平均值依次为0.62,1.23和2.04.与超覆于矿体之上的花岗闪长岩体和矿体下伏的围岩(灰岩)的稀土元素对比,认为矿体中稀土元素的来源为岩浆岩体和地层的不同比例混合,反映了成矿物质的多来源.岩体与围岩没有明显的铕异常,说明早期成矿流体对铕强烈的富集作用,且围岩中有机质造成氧化还原电位的降低.通过对La/Sm-La关系图和Ce/Yb-Eu/Yb变异图的分析,推测本区的岩浆岩以部分熔融为主,成矿晚期存在分离结晶现象. |
| 英文摘要: |
| Analysis of REEs in magnetite monomineral from foot wall,through middle part to hanging wall of the Fenghuangshan copper polymetallic deposit shows increase of the averages of ∑REE in magnetite monomineral which are 11.30×10-6,29.34×10-6 and 86.15×10-6 respectively with average δEu values varied from 0.62,1.23 to 2.04.Comparison of REE contents of the deposit with those of the overlying granodiorite and the underlying limestone indicates that REE content of orebodies are mixture of those of magmatic rocks and strata in different proportions and ore materials are multiple sources.No obvious Eu anomalies of the rockbodies and the wallrocks demostrates the strong enrichment of Eu in the early ore fluids,and lower redox potential caused by the organic matter in the wallrocks.Accoding to the variograms of La/Sm-La and Ce/Yb-Eu/Yb,we infer that the igneous rocks in this region are dominantly formed by partial melting and separative crystallization during late mineralizations. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
