胶东谢家沟金矿稀土元素特征及其成矿意义  

REE Characteristics of the Xiejiagou Gold Deposit,Eastern Shandong Province and Its Significance to Mineralizations

作　　者：王建国[1] 刘洪臣[2] 邓军[1] 张静[1] 刘秉光[2] 钱进 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国科学院地质与地球物理研究所,北京100029 [3]山东金亭岭矿业有限公司,山东招远265400

出　　处：《地质学报》2009年第10期1497-1504,共8页Acta Geologica Sinica

基　　金：国家"十一五"科技支撑规划项目(编号2006BAB01B02)资助的成果

摘　　要：谢家沟金矿是胶东金矿集中区新发现的一个大型金矿床,为韧性剪切带蚀变岩型金矿床,矿体主要赋存在NE向黄铁绢英岩化糜棱岩、超糜棱岩韧脆性剪切带中。本文对矿区的黑云母花岗岩、脉岩、矿石的稀土元素地球化学特征进行了系统研究,黑云母花岗岩、脉岩及矿石稀土元素地球化学特征表现为ΣREE较小,LREE富集,HREE亏损型,Eu异常不明显,脉岩、花岗岩和矿石的稀土元素球粒陨石标准化图谱曲线基本一致。认为矿区的花岗岩、中基性脉岩、成矿流体具有同源性,继承性;成岩、成矿物质主要来源于深部壳幔过渡带;谢家沟金矿成矿作用受中国东部中生代大规模壳慢相互作用控制。A newly-discovered Xiejiagou gold deposit, located in Eastern Shandong Province, is an alteration- rock type gold one controlled by the ductile shear belt. Ore bodies occur mainly in the NE-trending ductile and brittle shearing zone containing pyritic sercitized mylonite and ultramiylonite. The paper studies the REE geochemical characteristics of biotite granites, dikes and ore. The results show that they are characterized by enrichment of LREE and depletion of HREE, with low ∑REE and no obvious Eu anomaly, and their chondrite-normalized REE plots are primarily consistent. It is suggested that the rock and ore-forming materials originated mainly from deep crust-mantle transitional zone, and the mineralization of Xiejiagou gold deposit is controlled by the Mesozoic large-scale crust-mantle interaction in eastern China.

关 键 词：谢家沟金矿 稀土元素 成矿作用 山东 

分 类 号：P618.51[天文地球—矿床学] P618.44[天文地球—地质学]