内蒙古朝泥呼都格钼矿床稀土元素地球化学特征

Rare Earth Elements Geochemical Characters of the Rock from Zhaonihudouge Molybdenum Deposit,Inner Mongolia

内蒙古朝泥呼都格钼矿床受构造和岩体的控制明显,围岩蚀变强烈。本文通过对该矿床的稀土元素地球化学研究,显示该矿床稀土总量富集,轻、重稀土元素分异强烈,轻稀土分馏程度强于重稀土,铕具负异常,铈无明显异常。本矿床成岩、成矿物质主要来自壳幔混合的岩浆体。初步推测该矿床为斑岩型钼矿床。

Zhaonihudouge molybdenum deposit is under an obvious control by the structure and rock,host-rock alteration is strong in Inner Mongolia.It shows that the enrichment of the total rare earth deposits,light and heavy REE fractionation is strong,the fractionation of LREE is stronger than HREE,with a slight negative anomalies of Eu,Ce has no obvious abnormalities though the study of REE geochemistry of the deposit in this paper.The petrogenesis and mineralization,are mainly from the crust and mantle-forming materials mixed magma body.It speculated that the deposit is a porphyry molybdenum deposit initially.