大兴安岭博乌勒山一带早白垩世侵入岩地质特征

Geological features of Bowule Mountain early Cretaceous intrusive rocks in Daxing'anling Mountains

大兴安岭博乌勒山地区早白垩世侵入岩发育,可分为两个岩石系列:闪长岩类,有石英闪长岩、石英二长闪长岩;花岗岩系列,有花岗闪长岩、正长花岗岩、花岗斑岩。岩石学、岩石化学、岩石地球化学特征表明,岩石类型由中性向酸性演化,以成份演化为特征;属碱钙性-钙碱性系列,成因类型为同熔型(I型),并具有同源岩浆演化特点。成矿专属性,闪长岩类对Au、Ag、Pb、Zn金属成矿有利,花岗岩类对Cu、Pb、W、Mo金属成矿有利。

The early Cretaceous intrusive rocks in the Bowule Mountain area, Daxingan Mountain develop, they can be divided into two rock series： quartz diorite, quartz monzodiorite in dioriteoid; granodiorite, syenogranite, graniticporphyry in granite series. Petrology, petrochemistry, rock geochemical characteristics show that the evolution from neutral to acid rock type; it is characterized by component evolution, which belongs to alkali calcium- calcium alkaline series, genetic types belongs to melting type（type I）, and have the characteristics of cognate magma evolution. Metallogenic specificity, diorite is advantageous to Au, Ag, Pb, zinc mineralization,and granite is advantageous to Cu, Pb, W, Mo mineralization.