西昆仑阿巴列克地区地层样品稀土元素地球化学特征  

REE Geochemistry Characteristics of Stratigraphic Samples in the Abalieke Region,Western Kunlun

作　　者：沈能平[1] 张正伟[1] 彭建堂[1] 肖加飞[1] 朱笑青[1] 游富华[1,2] 张中山[1,2] 王富东[1,2] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳550002 [2]中国科学院研究生院,北京100049

出　　处：《矿物岩石地球化学通报》2010年第4期388-399,共12页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金："十一五"国家科技支撑计划重点项目(2006BAB07B04-04);中国科学院创新项目(KZCX2-YW-107-6);矿床地球化学国家重点实验室自主研究课题

摘　　要：阿巴列克地区位于西昆仑铅、锌、铜等多金属矿带的中部,该区具有极大的找矿潜力。为阐述成矿物质来源,本文系统测定了该区霍什拉甫组8条地层剖面82件样品的稀土元素组成。分析结果表明,样品的稀土元素含量变化较大,其∑REE、∑LREE、∑HREE、Y含量的变化范围分别为（7.52～220.70）×10^-6（、5.82～198.46）×10^-6、（1.49～32.74）×10^-6和（4.77～91.30）×10^-6;绝大多数样品的球粒陨石标准化配分模式均为典型的LREE富集型（∑LREE/∑HREE平均值6.57）,轻重稀土分馏显著[（La/Yb）N平均值8.20],并具弱负Eu异常（δEu平均值0.77）,Ce异常不明显（δCe平均值0.88）。对比研究发现,阿巴列克地区地层样品与西昆仑多金属矿带内其它四个代表性矿床（铁克里克、塔木、卡兰古、托库孜阿特）的岩石、矿石样品的稀土元素组成特征较一致,表明该矿带众多矿床的成矿物质与围岩二者间存在密切的成因联系。The Abalieke region locats in the central section of the western Kunlun polymetallic（Pb,Zn,Cu,etc） ore belt,an area with major potential for further base metal deposit discoveries.This paper reports REE data for 82 samples from 8 stratigraphic sections for Huoshilafu formation in the Abalieke region.To attempt to solve the origin of ore-forming materials using REE geochemistry.Although total REE contents are quite variable（∑REE =7.52×10^-6～220.70×10^-6,∑LREE = 5.82×10^-6～198.46×10^-6,∑HREE = 1.49×10^-6～32.74×10^-6 and Y = 4.77×10^-6～91.30×10^-6）,chondrite-normalized REE patterns of the majority of samples are uniformly LREE-enriched（averaging ∑LREE/∑HREE = 6.57）,with remarkably fractionation of LREE and HREE [averaging（La/Yb）N = 8.20],slightly negative Eu anomalies（averaging δEu= 0.77） and insignificant Ce anomalies（averaging δCe = 0.88）.The results demonstrate that REE characteristics of stratigraphic samples from Abalieke region are similar to those of rock and ore samples from other representative deposits（Tiekelike,Tamu,Kalangu,Tuokuziate） in the western Kunlun polymetallic ore belt,which indicate a close genetic relationship between the ore-forming materials and the host strata for the majority of deposits in this belt.

关 键 词：阿巴列克地区 稀土元素地球化学 西昆仑 

分 类 号：P595[天文地球—地球化学]