内蒙古三七林场一带多金属成矿控制条件与找矿潜力分析

Analysis of Metallogenic Control Conditions and Prospecting Potential in Sanqi Forest Farm Area of Inner Mongolia

目的三七林场一带已发现多处铜铅锌金银金属矿床,显示出较好的成矿条件和巨大的找矿潜力,总结该地区矿床时空分布特征和成矿控制条件,圈定成矿远景区,以期为区域地质调查和矿产勘查提供参考依据。方法以三七林场所处区域地质背景为着眼点,依托已发现的矿产和物化探成果,调查该区多金属矿床的时空特征,研究区域矿产时空分布规律和控矿条件,从而探讨区域矿产赋存规律,划分成矿远景区。结果总结矿床(点)时空分布特征、成矿时代和成矿期,分析该区显示成矿控制条件,圈定出Ⅰ级成矿远景区1个,Ⅲ级成矿远景区2个。结论通过对已发现矿床(点)的研究,显示该区具有较好的成矿条件和找矿潜力,多金属矿床和矿(化)点主要沿古生代含矿地质体、中生代构造岩浆带、NE向断裂呈NE向带状展布,成矿期均属燕山晚期。区内多金属矿化作用主要受NE向构造地质体及NE向区域性断裂控制,燕山早期陆内收缩挤压及燕山晚期NE、NW向岩浆带的活动,对区内金属矿产尤其是银、铋、铅、锌、铁的富集成矿极为有利。区内二站沟-铜矿沟Cu、Pb、ZnⅠ级成矿远景区、大石房子沟中游-大也气沟上游银钼铁Ⅲ级成矿远景区、三七林场南847高地银Ⅲ级成矿远景区具有较好的找矿前景。

ObjectiveThere are many copper lead zinc gold silver metal deposits in the area of Sanqi Forest Farm,which shows better metallogenic conditions and huge prospecting potential.So it is necessary to summarize the spatial and temporal distribution characteristics of deposits and the control conditions of mineralization in the area and delineate the prospecting potentials of metallogeny,so as to provide reference for regional geological survey and mineral exploration.MethodsBased on the geological background of Panax Sanqi forest farm,this paper investigated the spatiotemporal characteristics of the polymetallic deposits in the area,and studied the temporal and spatial distribution of regional mineral and ore controlling conditions,and them explored the occurrence of regional mineral deposits rule before dividing into prospecting area.ResultsThe spatial and temporal distribution,metallogenic epoch and metallogenic period of the deposit were summarized and the ore controlling conditions were analyzed.There were1metallogenic prospecting area of gradeⅠand2metallogenic prospecting areas of gradeⅢto be delineated.ConclusionsAccording to the study of the discovered deposits,the metallogenic conditions and prospecting potential of this area are very good.The polymetallic ore deposits and mineralization points are mainly zonal distribution,along the Paleozoic ore bearing geological body,Mesozoic tectonic magmatic belt,NE trending fault.The mineralization period belongs to the late Yanshan period.The polymetallic mineralization in this area is mainly controlled by NE tectonic geology and NE regional fracture control,early intracontinental contraction and compression of Yanshan and late Yanshanian NE and NW magmatic belt activities,especially for silver,bismuth,lead,zinc,iron enrichment is extremely favorable.They have good prospects for prospecting for Cu Pb Zn metallogenetic prospecting area of gradeⅠin Erzhangou Tongkuanggou,Ag Mo Fe metallogenetic prospecting area of gradeⅢin Dashifangzizhongyou Dayeqigoushangyou,Ag metallogenetic prospecting area of gradeⅢin847Highlands of south of Sanqi forest farm.