金川镍矿含矿岩体的稀土元素及微量元素地球化学特征  

GEOCHEMICAL STUDY OF REE AND TRACE ELEMENTS IN THE IGNEOUS ROCKS IN JINCHUAN NICKEL DEPOSIT AREA

作　　者：邓津辉[1] 史基安[1] 王琪[1] 高野穆一郎[2] 

机构地区：[1]中国科学院兰州地质研究所，甘肃兰州730000 [2]日本东京大学,东京153-8902

出　　处：《矿物岩石》2003年第1期61-64,共4页Mineralogy and Petrology

基　　金：气体地球化学国家重点室主任基金资助(ZRJJ-03)

摘　　要：通过对采自金川镍矿 I矿区露天矿的第二期侵入岩体中。样品的稀土元素、微量元素进行全岩等离子质谱 (ICP- MS)测定发现第二期侵入的岩体具有明显的轻稀土元素富集和无明显铕异常的特征 ,是上地幔低比例平衡部分熔融和分离结晶共同作用的产物。岩体中镍黄铁矿、磁黄铁矿、黄铁矿成条带状出现 ,表明其形成时低氧逸度的成岩环境。The samples used in this article are the second episode intrusive rocks in Jinchuan nickel deposit area.The contents of REE and trace elements in the samples measured by ICP MS showed that the REE abundance distribution pattern was characterized by high REE content ( 16.878 5 ×10 -6 ~53.590 1×10 -6 ), the enrichment of LREE (LREE/HREE=4.195 8~7.249 4) and no apperant Eu anomaly (δEu=0.822 3~1.546 5). It was considered to be resulted from the low partial melting of the upper mantle and separated crystallization. The REE pattern of the rocks and the appearance of nickel pyrites, pyrite and pyrrhotite in the samples indicated that the rocks were in low oxygen fugacity during the formation of the Jinchuan nickel deposit.

关 键 词：金川镍矿 稀土元素 微量元素 平衡部分熔融 分离结晶 

分 类 号：P618.53[天文地球—矿床学]