八庙—青山金红石矿床化学成分与成矿关系

RELATIONS BETWEEN CHEMICAL COMPOSITION AND MECHANISM OF THE BAMIAO QINGSHAN RUTILE DEPOSIT

本矿床是我国金红石矿床重要的成因及工业类型，为具有特定化学成分的岩石在特定变质条件下形成的。本文通过对大量数据的处理，查明了化学成分与成矿的关系：高Ａｌ２Ｏ３、ＭｇＯ、Ｆｅ２Ｏ３＋ＦｅＯ、Ｋ２Ｏ、Ｐ２Ｏ５、Ｈ２Ｏ＋、ＭｎＯ，低ＳｉＯ２、ＣａＯ、Ｎａ２Ｏ、ＣＯ２、Ｓ等，利于钛富集；高ＴｉＯ２、ＭｇＯ、Ｐ２Ｏ５、Ｓ，低ＳｉＯ２、ＣａＯ、Ｋ２Ｏ、Ａｌ２Ｏ３、Ｆｅ２Ｏ３／ＦｅＯ，利于金红石形成；高Ｓｃ、Ｚｒ、Ｎｉ、Ｚｎ及Ｌａ／Ｙｂ，低Ｙ、Ｎｂ、Ｔｈ、Ｃｄ、Ｂａ、Ｂｅ、ΣＲＥＥ，利于金红石纯度提高。

This deposit is an important genetic type and industrial type of rutile deposit in our country, it was formed from special composition rock under specical metamorphic conditions.The relations between chemical composition and mechanism of the deposit have been studied through processing of a great deal of datum.High content of Al 2O 3, MgO, Fe 2O 3+FeO, K 2O,P 2O 5,H 2O +,MnO,and low content of SiO 2,CaO, Na 2O,CO 2,S,are beneficial to titanic enrichment;high content of TiO 2,MgO,P 2O 5,low content of SiO 2,CaO,K 2O,Al 2O 3,Fe 2O 3/FeO are beneficial to rutile formation; high content of Sc, Zr,Ni,Zn,La/Yb,and low content of Y,Nb, Th, Cd,Ba,Be,ΣREE,are beneficial to improving pure degree of rutile.The researched result has an important significance to study genesis of the deposit and look for the same new deposit.