金属矿区磁法勘探的进展与展望

DEVELOPMENT OF MAGNETIC EXPLORATION SEARCHING FOR METALLIC ORE DEPOSITS IN CHINA

１９３６年李善邦等人首次在我国进行了金属矿区的磁法勘探工作．从那时到现在的５０多年里，磁法勘探在我国从萌芽到大发展，我国金属矿区磁法勘探不同发展阶段具有不同特点．不断扩大应用范围，从直接找磁铁矿床发展到普查预测有色、稀有及贵金属矿床；不断提高观测数据的质量，用包含信息量更多的新数据代替老数据；建立斜磁化三度体的理论；引用新技术，发展数据处理技术和反演方法；将磁法勘探看作是综合地球物理勘探的一个组成部分，并在此前题下，发展磁异常的地质解释方法．对重要金属矿成矿区带进行高精度大比例尺综合航空地球物理勘探，结合地面重力进行地质填图及矿产预测；研究岩石中磁性矿物产生和消失与地质成矿过程的关系；建立磁测数据库、数据成图、处理及解释推断系统以及建立待找矿产的地球物理－地质综合找矿模式，必将促使磁法勘探有更大的发展．

The first magnetic exploration searching for metallic ore deposits in China was carried out in 1938 by Qin Xin-ling in the ShuiKou Shan lead and zinc Mine, situated in the south part of Hunan Province. According the historic facts, the development of this method may be divided into four stages, i. e. stage of birthing, stage of fast developing, stage of forming theoretic base and stage of advanced development.In my opinion, the main points of the development may be stated as below:1. Extending the field of application of magnetic exploration, especially, using it in the predication of base, rare and noble metallic ore deposits.2. Bettering the quality of observed data,in order to replace the old by the new data which contains more information than the old.3. Developing theory of 3D-body of inclined magnetization,developing technique of data processing and quantitative interpretation.4. Taking magnetic exploration as a constituting part of an integrated geophysical exploration and under guide of this consideration, developing the method of geologic interpretation of magnetic anomaly.To prompt the advancing development of magnetic exploration, 1 think it is worth to carry out large scale(1:25000 to 1:10000) integrated airbone geophysical exploration in the interesting regions of ore deposits,to do more work in the field of root magnetism,to study the method of interpretation of complex anomaly and to build the geophysical-geological model of interpretation for finding ore deposits.