甘新蒙北山北带北亚带甘肃段的岩浆岩地质特征

研究区地处甘肃省肃北蒙古族自治县红石山一线以北，大地构造处于哈萨克斯坦板块东端南缘。隶属四顶黑山—雀儿山古生代岩浆弧带，总体上呈近EW向展布。依据侵入岩活动时代和侵入岩特征以及与构造的关系。划分出三叠纪小草湖超单元（TX）和马鞍山超单元（TM），二叠纪干河梁超单元（PG）；石炭—二叠纪四顶黑山序列（C-PS）、双沟山序列（C-PSH）和大鱼山序列（C-PD），以及石炭纪的四顶黑山基性一超基性杂岩（Cv^s）等。

GEOLOGICAL CHARACTERISTICS OF IGNEOUS ROCKS DISTRIBUTED IN GANSU SECTION OF SUBNORTH BELT OF BEISHAN MOUNTAIN LOCATED IN BORDER OF GANSU-XINJINAG-MONGOLIA

Survey area lies in Subei county of Gansu Privince, tectonicaly belongs to Sidinghishan-Queershan magatic arc belt in paleozoic which situated on the east-south margin of Kazabstan paleoplate. It tends to nearly east-west direction.Its material compositions there are the Paleozoic strata, the intrusive rocks in Triassic and carboniferovs, the main fault in the north of sidingbishan-shuang goushan. The intrusive rocks include Triassic Xiaocaohu Superunit and manshan Superunit, Paleozoic Ganheliang Superunit, Carboniferous-Paleozoic Sidinghishan Sequences, Shuarggoushan Sequences and Dayushan Sequences, Carboniferous, Sidinghishan ba- sic-uhrabasic rocks.