河南蒲塘、毛堂金矿稀土元素地球化学特征

REE GEOCHEMICAL CHARACTERISTICS OF THE PUTANG AND MAOTANG GOLD DEPOSITS IN HENAN PROVINCE

稀土元素广泛用于岩浆起源、岩浆演化和岩石学领域，用于矿床成因研究和指导找矿只是近几年来的事。笔者通过对河南蒲塘、毛堂金矿不同类型矿石、岩石稀土元素研究，认为在氧化和热液作用下轻稀土元素淋失，重稀土元素相对富集，ΣLREE／ΣHREE比值和ΣREE降低，热液和表生氧化作用对稀土元素的影响是通过斜长石的形成与分解实现的。研究表明，矿化强度与δEu和ΣLRE／ΣHRE有一定的相关关系，这一关系可作为矿床评价的标志之一。

The REEs have been widely applied to mmpatic origin, magmatic evolution and diagenesis, but it is only a recent story that the REEs are applied to mineralization and ore prospecting. The REE characteristics of different ores and rocks at Putang and Maotang, Henan indicate that the light REEs are leached, the heavy REEs are relatively enriched and the ratio of un to HREE and ΣREE tend to decrease in the processes of oxidization and hydrothermalism. The influence of hydrotherrna1 solution and hypergene oxidization on the REEs is realized by the formation and dismembering of plagioclase. The intensity of mineralization is related to δEu and ΣLREE／ΣHREE. It is proposed that the relation of REE with mineralization can be used for the evaluation of minera deposits.