内蒙古北山造山带东段虎头山北地区地质构造特征及铜金找矿方向探讨

Geological structural features and copper-gold prospecting direction of the northern Hutoushan in the eastern section of the Beishan Orogenic Belt,Inner Mongolia

北山造山带是我国西北重要的矿集区,虎头山北地区位于该区东段,是寻找铜、金多金属矿床的有利区域。作者以板块构造理论和成矿系列理论为依据,根据区域典型矿床和测区铜金矿床的对比研究,总结了测区矿床的时空展布特征、成矿和演化规律,对测区控矿条件和找矿方向进行了讨论。测区古元古界北山岩群地层和志留系公婆泉组是铜、金矿化的主要含矿层位,燕山期花岗岩同期含矿热液是矿液来源,F1断裂不仅创造了容矿空间,为成矿热液提供了通道,也是重要的成矿控矿构造。结合区内物化探特征,在测区圈出4个成矿远景区和4个优选找矿靶区。

Located in the eastern section of Beishan Orogenic Belt,one of the most important mineralization areas in northwest China,the northern Hutoushan is a favorable area for prospecting copper and gold polymetallic deposits. Based on the theory of plate tectonics and metallogenic series,and the comparative study of typical regional deposits and copper-gold deposits in the survey area,the temporal and spatial distribution characteristics,mineralization and evolution rules of deposits in the survey area are summarized,and the ore control conditions and prospecting direction in the survey area are discussed. The strata of Paleoproterozoic Beishan group and Silurian Gongpoquan formation are the main ore bearing horizons of copper and gold mineralization. The F1 fault not only creates ore hosting space and provides a channel for ore-forming hydrothermal solution,but also is an important ore-controlling structure. According to the characteristics of geophysical and geochemical exploration in the area,four metallogenic prospective areas and four preferred prospecting targets are delineated.