基于航磁资料的大兴安岭南部区域成矿构造填图尝试  

Experiment on revealing the regional metallogenic structure based on the aeromagnetic data in southern Da Hinggan Mountains

作　　者：朱小三[1,2] 卢民杰 管烨[1,2] 张颖慧 ZHU Xiaosan;LU Minjie;GUAN Ye;ZHANG Yinghui(Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;Three-dimensional Geological Survey and Research Center,China Geological Survey,Beijing 100037,China)

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国地质调查局三维地质调查研究中心,北京100037

出　　处：《地质通报》2018年第2期299-313,共15页Geological Bulletin of China

基　　金：国家自然科学基金项目<基于深反射地震资料探讨扬子古陆块和华夏古陆块元古代碰撞造山带>(批准号:41404070);中国地质调查局项目<内蒙古东南部三维建模区地球物理数据采集与解释>(编号:DD20160125-03);<安第斯成矿带区域地球物理特征与优势矿产资源潜力分析>(编号:DD20160102-2)

摘　　要：大兴安岭地区是中国重要的成矿区带之一,具备大规模成矿的条件和找矿潜力。对大兴安岭地区的大型断裂、次级断裂及基底构造系统深入研究是揭示控制该地区构造-岩浆活动和成矿作用的重要内容。对大兴安岭南部的航磁数据进行处理和解释,查明了研究区北东向、东西向、北北东向和北西向深大断裂为主的深部基底构造特征,圈定了火山机构分布位置,分析了大兴安岭南部区域构造特征,揭示了反映岩浆岩活动的线性或面状正磁异常和磁异常梯级带,探讨了研究区金属成矿的有利区带。为大兴安岭南部地区的区域地质、构造特征三维地质填图、找矿远景区的圈定提供了基础性信息。The Da Hinggan Mountains is one of the very important metallogenic belts in China in that it has the condition of largescale mineralization and prospecting potential.The thorough study of the large faults,sub-faults and basement structure system of southern Da Hinggan Mountains is an important step for probing into the control of the tectono-magmatic rocks and mineralization in this area.In this paper the authors conducted the processing and interpretation of the aeromagnetic data obtained from southern Da Hinggan Mountains.The authors found the deep great faults in NE,EW,NNE and NW directions,which indicate the deep basement structure characteristics of this area.The authors ascertained the locations of volcanic mechanisms,and analyzed the regional geological-structural characteristics of the Da Hinggan Mountains.The authors revealed the positive magnetic anomalies and anomaly gradient belts distributed in linear and plane shapes,which indicate the activities of magmatic rocks.The favorable areas of metallic mineralization were also investigated.This study provides some basic information for the further research on regional geology,structural characteristics and mineral resources prospecting in southern Da Hinggan Mountains.

关 键 词：大兴安岭 航磁异常 构造解释 深大断裂 火山机构 

分 类 号：P631.222[天文地球—地质矿产勘探] P54[天文地球—地质学]