常用地球物理方法勘探深度研究

发布时间：2018-04-01 08:41

本文选题：勘探深度　切入点：航空物探　出处：《地球物理学进展》2017年06期

【摘要】：地球物理勘探在地学研究中起到十分重要的作用,其方法种类较多,在各类物探方法的具体工作中,了解相应方法所能探测到异常体的深度范围,对物探工作的开展十分重要.本文通过对当前地面重力与磁法、常用的电法、放射性方法以及常用的各类航空物探方法在找矿等方面的众多实例勘探深度的研究,总结归纳了现阶段各种常用地球物理方法的勘探深度.总结发现目前重力勘探的找矿深度一般在400 m左右,最大可达到897 m;在地质构造研究方面勘探深度在10~20 km之间,结合其他物探方法最深可达到150 km.目前磁法勘探找矿深度一般在400~500 m,最大深度可达到989 m.电法勘探分支方法较多,多数电法的勘探深度在200~300 m;瞬变电磁法的勘探深度集中在300~400 m,最大可以达到1500 m;大地电磁法的勘探深度集中在700~800 m,最大可达到1800 m以上.放射性勘探主要集中于地表至200 m以浅的放射性矿产勘探.并以典型实例说明各种物探方法可达到的最大深度,研究了影响各种地球物理方法勘探深度的因素,根据总结得到的各类地球物理方法勘探深度,对不同物探方法所适用的地质研究领域与深部找矿方向进行了展望,为实际工作的设计提供参考.
[Abstract]:Geophysical exploration in the study play a very important role in the research, the method of many types, specific work in various geophysical methods, understand the corresponding method can detect the depth of abnormal body, to carry out geophysical exploration work is very important. This article is based on the surface gravity and magnetic method, the commonly used method study, radioactive methods and common aviation geophysical method in prospecting exploration depth of many examples and other aspects, summarizes the exploration depth of present commonly used geophysical methods. The prospecting depth of gravity exploration is generally around 400 m, the maximum can reach 897 m in geological exploration; in the depth of 10~20 km, combined with other geophysical methods, most can reach 150 km. the magnetic prospecting prospecting depth in 400~500 m, the maximum depth can reach 989 M. branch of electrical prospecting method More, most of the electrical exploration depth in 200~300 m; the exploration depth of the transient electromagnetic method focused on 300~400 m, the maximum can reach 1500 m; the depth of exploration of the magnetotelluric method in 700~800 m, the maximum can reach above 1800 m. Radioactive exploration mainly concentrated in the surface to 200 m with radioactive mineral exploration and shallow. With typical examples of various geophysical methods can reach the maximum depth, the main influence factors of various geophysical methods of exploration depth, according to various geophysical methods of exploration depth are summarized, geological research on applicability of different geophysical methods and deep ore prospecting direction is presented, which provides reference for the design of practical work.

【作者单位】：中国国土资源航空物探遥感中心;
【基金】：国家重点研发计划课题(2017YFC0602201,2017YFC0602106) 中国地质调查项目(121201203000160006) 国家高技术研究发展计划(863)课题(2013AA063905) 新疆地勘基金项目(T15-1-LQ41)联合资助
【分类号】：P631

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