遥感在长白山玄武岩覆盖区基岩填图中的应用

Application of remote sensing technology in geological bedrock mapping of basalt covered area in Changbai Mountains

长白山地区地处吉林省东南部,属辽东-吉南成矿带的北东段,具有较好的找矿潜力,但限于大面积新生代玄武岩覆盖,传统地质找矿工作一直难有突破。为加大该区的地质研究程度,充分利用遥感覆盖范围广、获取信息量大、获取信息不受地面条件限制等特点,采用高分辨率数据和高程数据,通过总结区内玄武岩平台、火山锥和出露基岩在色调、地貌、水系和人文活动方面的组合特征,进行遥感解译,结合相关地质资料和野外验证填绘基岩地质图,为该区玄武岩盖下找矿提供基础地质信息,也为类似区域地质调查提供了遥感解译方法参考。

Changbai Mountain area is located in the southeast of Jilin Province,which belongs to the northeast part of Liaodong Jinan metallogenic belt.It has good prospecting potential.However,due to the large area of Cenozoic basalt covered,the traditional geological prospecting work has been difficult to make a breakthrough.In order to increase the degree of geological research in this area,the authors make full use of the characteristics of remote sensing,such as wide coverage,large amount of information and not limited by ground conditions.Used high-resolution data and elevation data to summarize the combination characteristics of basalt platform,volcanic cone and exposed bedrock in the area in terms of hue,landform,water system and human activities,remote sensing interpretation is carried out.Combined with relevant geological data and field validation,the bedrock geological map is filled and drawn,which provides basic geological information for prospecting under the basalt cap in this area,and also provides a reference for remote sensing interpretation of geological survey in similar areas.