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| 云南大红山铜铁矿床构造地球化学特征初探 |
| Tectonogeochemical Dahongshan copper and iron deposits in Yunnan Exploration features |
| 投稿时间：2014-05-22 修订日期：2014-05-22 |
| DOI： |
| 中文关键词: 大红山 铜铁矿 构造地球化学 云南 |
| 英文关键词:Dahongshan copper and iron deposits Tectonogeochemical Yunnan |
| 基金项目:矿产勘查风险基金;其他项目 |
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| 摘要点击次数: 832 |
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| 中文摘要: |
| 本文主要选取大红山铜铁矿床典型穿脉进行构造-岩石地球化学编录,系统取样并对样品稀土元素进行化验分析。研究表明:(1)该矿区内各类岩(矿石)从矿化构造岩→矿石→未矿化构造岩的稀土总量呈现出逐渐降低的趋势,反映出成矿流体与不同构造岩的水岩反应程度上的差异。(2)从(La∕Yb)N看,该矿区内同类断裂构造岩的轻稀土分异程度较大,但不同断裂构造岩间的分异性却较为均一,从该区围岩、矿石、构造断裂岩的LREE∕HREE与(La∕Yb)N比值特征中可以看出,轻稀土元素与重稀土元素间的分异程度具有一定的相似性,反映出成矿流体对地层岩石存在着一定的继承性,却又具有一定的阶段演化性特征。(3)从地层岩石→未矿化断裂构造岩→矿化断裂构造岩→块状、条带状矿石,LREE∕HREE(5.66～13.27)有逐渐增大的趋势,反映出在断裂构造作用过程中,稀土元素发生了迁移；该矿区内各类岩(矿)石的δEu均大于1,δCe弱负异常,显示出大红山铜铁矿床的成矿作用主要是在相对氧化的环境下进行。 |
| 英文摘要: |
| In this paper, copper and iron deposits in selected Dahongshan typical wear veins constructed - geochemical catalog , systematic sampling and REE samples for laboratory analysis. (1)Studies have shown that various types of rock mine area ( ore ) from mineralized tectonic →ore → not total mineralization tectonic rare earth showing a decreasing trend , reflecting the extent of water-rock reactions forming fluids on different tectonic differences. (2)From (La / Yb) N look like mine in the region of the light rare earth faults of large rocks different degree , but of the opposite sex between different faults but relatively homogeneous rocks from the area surrounding rock , ore, rock structural faults LREE / HREE with (La / Yb) N ratio characteristics can be seen , the degree of differences between LREE and HREE has some similarities to the formation of rock -forming fluids reflects the existence of certain inheritance, but with a certain stage of evolution characteristics . (3)From the formation rock→ non-mineralized faults rock → mineralized faults rock →massive\ banded ore , LREE / HREE (5.66 ~ 13.27) gradually increasing trend , reflecting the role of process faults , rare earth element migration occurred ; mine area all types of rock ( ore ) stone δEu greater than 1, δCe weak negative anomalies , showing Dahongshan mineralization is mainly copper and iron deposits in a relatively oxidizing environment . |
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