The Fanshan Apatite-magnetite Deposit in the Potassic Ultramafic Layered Intrusion,North China
会议名称：《中国科学院地质与地球物理研究所2003学术年会》
会议日期：2003年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
基 金：financially supported by the Chinese Academy of Sciences(Grant No. KZCX 1-07)
关 键 词：Fanshan apatite-magnetite deposit potassic ultramafic-syenite complex layered intrusion rhythmic unit North China
摘 要：This article reviews work carried out on the Fanshan layered apatite(-magnetite) deposit,which occurs in the Fanshan complex,a potassic ultramafic-syenite layered intrusion located in North *** Fanshan complex intruded into Proterozoic sedimentary rocks in the early *** complex comprises First- to Third-Phase *** First-Phase Intrusive includes rhythmic Units 1 to *** mainly consist of clinopyroxenite and biotite *** apatite(-magnetite) deposit is situated near the top of rhythmic Unit no.6 of the First-Phase Intrusive. The economical deposit comprises OrebodyⅡand OrebodyⅢ.OrebodyⅡ.situated at the top of Unit no.6,consists of two kinds of layer:one magnetite-apatite rock layer at the top and a few apatite rock layers at the ***Ⅲis situated several meters below OrebodyⅡ,and consists of an apatite rock layer. There is controversy over the ore formation mechanism,the temperature and pressure of the magma intrusion,and the origin of the magma(including the possibility of magma immiscibility).We review these problems of this unique apatite(-magnetite) magmatic deposit.