中文摘要：

内蒙古浩尧尔忽洞金矿位于华北地台北缘西段中元古代白云鄂博台缘凹陷带西部，矿区内有大面积花岗质岩体和岩脉出露，其岩性主要包括石英二长闪长岩、二长花岗岩和碱长花岗岩。通过岩相学特征和岩石地球化学特征分析，结合区域上同类型岩体的侵入时代，认为浩尧尔忽洞岩体形成于华北板块与西伯利亚板块同碰撞一后碰撞环境。其中二长花岗岩形成于同碰撞环境，该环境下由于板片持续俯冲，引起俯冲板片及地幔楔发生熔融，其上侵带来的热量致使下地壳物质部分熔融而形成该类型岩石的母岩浆；石英二长闪长岩形成于碰撞后隆起环境，是加厚下地壳熔融的产物；碱长花岗岩属于晚造山期A型花岗岩系列，该阶段地幔玄武质岩浆底侵，导致下地壳物质熔融，部分与其发生混染。结合浩尧尔忽洞金矿的成矿年龄、成矿流体特征及赋矿岩石有机地球化学特征，认为岩体的侵位提供了矿床形成必不可少的热量及部分成矿流体来源。

英文摘要：

The Haoyaoerhudong gold deposit is located in the west of the Mesoproterozoic Bayan Obo rift on the west section of the northern margin of the North China Platform. A lot of granitoid plutons and dykes appear in the interior and outskirts of the diggings mainly including quartz monzodiorite, monzonitic granite and alkali feldspar granite whose enclaves are named as monzogabbro. By analyzing the characteristics of petrography and petrogeochemistry, combining with the intrusion era of the same type plutons in the same region, the Haoyaoer- hudong pluton was considered to be formed in the syn-collisional and post- collisional environment of North Chi- na Plate and Siberia Plate, Among them, the monzonitic granite formed in syn-collisional environment, and is possibly influenced by the heat of melting of the underthrust plate and mantle wedge in the process of subdue-tion, of which the parental magma derived from partial melting of lower crust; the quartz monzodiorite formed in the uplift environment of post-collisional, resulting from the melt of the thickening lower crust; the alkali feld- spar granite belongs to the series of A-type granites of the late orogenic era when the mantle basaltic magma un- derplated leading to the lower crust melting and being mixed. Combing with the mineralization ages, the charac- teristics of the mineralization fluid and organic geochemistry of host rocks, the invasion of pluton is considered to offer essential heat and part of ore-forming fluid sources.