博罗科努加里东褶皱带海西早期花岗岩地质特征

GEOLOGIC FEATURES FOR GRANITES OF THEVARISCIAN EARLY PERIOD ON THE BELUOHONUCALEDONINA FOLDBELT

本文通过对海西早期花岗岩的地质学、岩石学、岩石化学和地球化学、同位素等方面的详细论述，探讨了花岗岩的成因类型和岩浆起源，在此基础上探讨了该地区花岗岩的形成环境。笔者认为海西早期花岗岩的成因类型以Ⅰ型花岗岩为主，岩浆起源于上地壳下部；花岗岩是在中泥盆世晚期准噶尔板块向南与伊犁板块挤压碰撞时，在博罗科努加里东褶皱带上形成的同构造碰撞期花岗岩。

In this poper,the author discussed the characteristics of granites of the variscian early period in geology,petrology, petrochemistry, geochemistry and isotope etc, and inquired into its petrogenetic types, magmasources and tectonic environments of granites in this region. The author also considered that the main peteogranitic type is Ⅰtype granite,granitic magma originated under the upper crust, granites are the same as thetectonic collision period granites that Junggar Plate collided with Yili Plate on the Beluohonu caledonina foldbeltin the middle Devonian Epoch later Period.