沽源--红山子成矿带赋矿围岩研究进展

Research progress of host rock in Guyuan hongshanzi metallogenic belt

沽源-红山子成矿带是我国重要的火山岩型成矿带之一,跨冀北-辽西火山-侵入岩带和大兴安岭火山-侵入岩带,南起河北北部、北至内蒙古赤峰市南部,总体呈NE向展布,以康保-围场断裂为界,可分为沽源成矿区和红山子成矿区.其中,沽源矿化集中区赋矿围岩主要为次火山岩与流纹岩-粗面岩,而红山子矿化集中区的赋矿围岩主要为次火山岩与流纹岩-粗面岩。前人已经对沽源-红山子成矿带做了大量的研究,对其火山-侵入岩的时空分布规律、成岩成矿时代、围岩蚀变特征等有了较清晰的认识,同时也发现研究过程中仍有存在争论和亟待解的问题。主要表现为;关于赋矿围岩岩性的判别及分类。解决这些问题,可以加深我们对该成矿带的认识,同时为该区火山岩型矿床找矿工作具有重要的指导意义。

The Guyuan-Hongshanzi uranium metallogenic belt is one of the important volcanic-type uranium metallogenic belts in China.It spans the North-Liaoxi volcanic-intrusive belt and the Daxinganling volcanic-intrusive belt,from the north of Hebei to the north to Chifeng,Inner Mongolia.In the south of the city,the NE is generally distributed,and the Kangbao-Weichang fault is the boundary.It can be divided into the Wuyuan metallogenic area and the Hongshanzi metallogenic area.Among them,the ore-bearing surrounding rocks in the Wuyuan mineralization concentration area are mainly subvolcanic rocks.Rhyolite-rough shale,and the ore-bearing surrounding rocks in the Hongshanzi mineralization concentration area are mainly subvolcanic rocks and rhyolite-rough shale.The predecessors have done a lot of research on the Wuyuan-Hongshanzi uranium metallogenic belt,and have a clear understanding of the temporal and spatial distribution of volcanicintrusive rocks,diagenesis and mineralization age,and surrounding rock alteration characteristics.It is also found that there are still problems and ambiguities in the research process.Mainly expressed as:Discrimination of lithology of ore-bearing igneous rocks.Solving these problems can deepen our understanding of the metallogenic belt and at the same time have important guiding significance for the prospecting work of volcanic rock type uranium deposits in this area.