阿拉山口西侧侵入岩的解体及克孜勒扎依劳大岩基就位机制分析

THE DISINTEGRATION OF THE INTRUSIVE ROCKS ON THE WEST OF ALASHANKOU AND THE EMPLACEMENT MECHANISM OF THE KEZILEZHAYILAO BIG BATHOLITH

摘要: 通过对岩石学矿物学特征、接触关系、围岩构造、形成时代等的详细研究，按构造-岩浆演化期次的划分原则，将新疆阿拉山口西侧侵入岩解体重新归纳为石炭纪混源序列，划分成8个侵入序次，各个侵入序次间为脉动接触关系.克孜勒扎依劳大岩基是在北西向走滑断裂之间形成的拉分应力场中被动就位的，从形态和结构特征及围岩的变形和变质特征来看，克孜勒扎依劳大岩基是以气球膨胀的方式就位的.

Abstract: Through the detailed research on petrography, mineralogy, contact relation, wallrock structures and forming age, according to the classification principles of tectono-magmatic evolutionary times, the intrusive rocks on the west Alashankou in Xinjiang Region is disintegrated and regrouped as the Carboniferous crust-mantle mixed succession, including eight intrusive sequences, with pulsatile contact relation between each sequence. Considering the form, structure and the deformation and metamorphism of wallrocks, the Kezilezhayilao big batholith is passively emplaced with the balloon-like inflation in the pull-apart stress field that formed between the northwest-trending strike-slip faults.