| 辽宁树基沟铜锌矿床地球化学特征及成因 |
| |
| 引用本文： | 郝明,杨言辰,张国宾,韩世炯,谈艳.辽宁树基沟铜锌矿床地球化学特征及成因[J].世界地质,2014,33(2):337-347. |
| |
| 作者姓名： | 郝明 杨言辰 张国宾 韩世炯 谈艳 |
| |
| 作者单位： | 吉林大学 地球科学学院，长春 130061 |
| |
| 基金项目： | 中国地质调查局地质大调查项目（1212011120342）. |
| |
| 摘 要： | 辽宁树基沟铜锌块状硫化物矿床产于太古宙绿岩带中,矿床形成后经历了强烈的变质和变形,变质程度达到高级角闪岩相。通过含矿岩系地球化学研究,讨论了岩浆来源、成岩构造背景及成因。研究表明,含矿岩系明显富集大离子亲石元素、轻稀土元素及活泼的不相容元素,相对亏损高场强元素和重稀土元素,具有较高的Th/Ta、Ce/Yb、La/Nb、La/Ta比值,其原始地幔标准化的微量元素蛛网图模式与典型钙碱性岛弧玄武岩模式极为相似,均呈"三隆起"的形式,原岩为一套中酸性火山-沉积岩组合,区内这套英安岩、流纹岩、安山岩-玄武岩的钙碱性火山岩组合是由同源岩浆分异所得,其形成于岛弧环境。综合矿床形成背景环境、成矿物质来源和矿床地质特征,笔者初步认为其成因类型为诺兰达型块状硫化物矿床。
|
| 关 键 词： | 地球化学 岛弧环境 块状硫化物矿床 铜锌矿 树基沟 辽宁 |
Geochemical characteristics and genesis of Shujigou Cu-Zn deposit,Liaoning |
| |
| HAO Ming,YANG Yan-chen,ZHANG Guo-bin,HAN Shi-jiong,TAN Yan.Geochemical characteristics and genesis of Shujigou Cu-Zn deposit,Liaoning[J].World Geology,2014,33(2):337-347. |
| |
| Authors: | HAO Ming YANG Yan-chen ZHANG Guo-bin HAN Shi-jiong TAN Yan |
| |
| Institution: | College of Earth Sciences，Jilin University，Changchun 130061，China |
| |
| Abstract: | Shujigou Cu-Zn massive sulphide deposite originated in the Archean greenstone belts of Liaoning.It was experienced intensive metamorphism and deformation after the formation of ore deposits.Its metamorphism extent reached advanced amphibolite facies.Through the study of geochemistry,the authors discussed the magma source,tectonic setting and genesis.The study showed that ore-bearing rocks obviously enriched in LILE,LREE and lively incompatible elements and relatively depleted in high field strength elements and HREE,with high Th / Ta,Ce / Yb,La / Nb,La / Ta ratios.The mode of primitive mantle-normalized spider diagram was quite similar to the typical calc-alkaline island arc basalts which showed ＂three uplift＂ form.The original rock was a set of acidic volcanic-sedimentary assemblage.The calc-alkaline volcanic assemblage of dacite,rhyolite and andesite-basalt in this area was the product of comagmatic differentiation,which formed in an island arc environment.Consolidating the forming background environment of deposit,material source and geological characteristics,the authors preliminarily consider that the genetic type was Noranda-type for massive sulphide deposit. |
| |
| Keywords: | geochemistry island arc environment massive sulfide deposit Cu-Zn deposit Shujigou Liaoning |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《世界地质》浏览原始摘要信息 |
| 点击此处可从《世界地质》下载免费的PDF全文 |
|
