| 肖斌,范玉华,李俊,杨光树,戚金栋,孙明书,覃龙江,武贤文,赵应班.云南大红山铜铁矿床构造地球化学特征[J].地质找矿论丛,2015,30(3):366-373 |
| 云南大红山铜铁矿床构造地球化学特征 |
| Tectonogeochemical characteristics of Dahongshan copper and iron deposit in Yunnan province |
| 投稿时间：2015-05-22 |
| DOI：10.6053/j.issn.1001-1412.2015.03.008 |
| 中文关键词: 大红山铜铁矿 构造地球化学 云南省 |
| 英文关键词:Dahongshan Cu-Fe deposit Tectonogeochemistry Yunnan province |
| 基金项目:云南新平大红山铁矿床矿化富集规律及深部找矿预测研究项目资助。 |
| 作者 | 单位 | E-mail | | 肖斌 | 昆明理工大学国土资源工程学院, 昆明 650092 | | | 范玉华 | 昆明理工大学国土资源工程学院, 昆明 650092
云南省地质调查院, 昆明 650216 | | | 李俊 | 昆明理工大学国土资源工程学院, 昆明 650092 | Li_jun@kmust.edu.cn | | 杨光树 | 昆明理工大学国土资源工程学院, 昆明 650092 | | | 戚金栋 | 昆明理工大学国土资源工程学院, 昆明 650092 | | | 孙明书 | 昆明理工大学国土资源工程学院, 昆明 650092 | | | 覃龙江 | 玉溪大红山矿业有限公司, 云南玉溪 653405 | | | 武贤文 | 玉溪大红山矿业有限公司, 云南玉溪 653405 | | | 赵应班 | 玉溪大红山矿业有限公司, 云南玉溪 653405 | |
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| 中文摘要: |
| 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,矿区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值特征中可以看出,轻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和阶段演化性特征;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,反映出在断裂过程中,稀土元素发生了迁移。矿区内各类岩(矿)石的δ(Eu)>1,δ(Ce)呈弱负异常,显示出成矿作用主要是在相对氧化的环境下进行。 |
| 英文摘要: |
| Along typical transverse drift in Dahongshan Cu-Fe mine tectonics-petrochemical details are logged and samples are collected systematically and REE of the samples are analyzed. The results show:① Total REE decreases gradually from the mineralized tectonite, through ore and to not mineralized tectonite reflecting difference of water(ore fluid)/rock reaction on various tectonites; ② According to (La/Yb)N differentiation of LREE for tectonite of the same kind of fault is quite obvious but the differentiation of LREE for tectonite of the varied kind of fault is more uniform and according to LREE/HREE and (La/Yb)N ratio of wallrock, ore and tectonite LREE and HREE differentiated in similar way reflecting a certain heritability of the ore fluid from rock of stratum and the staged evolution. ③ From rock of stratum, through not mineralized fault tectonite, mineralized fault tectonite to massive and banded ores LREE/HREE ratio(5.66-13.27)increase gradually reflecting mobilization of REE during faulting and all δ(Eu)>1 and the δ(Ce)weak anomly imply that Dahongshan Cu-Fe deposit was formed mainly under a relatively oxidizing environment. |
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