Low-altitude aeromagnetic survey: Drones and high frequency magnetometers. Experiences and perspectives

M. I. Epov, A. P. Firsov, I. N. Zligostev, A. V. Savluk, A. Y. Bondarenko, P. A. Weisman, A. S. Kolesov, A. S. Sheremet

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

Growth of the mineral resource base requires geological and geophysical studies in difficult-access conditions. Airborne geophysical survey is usually carried out during small-scale works. Large-scale surveys are conducted on foot. Most of Russia's territory is characterized by harsh conditions for such magnetic surveys - which is one of the main tools of geological and geophysical study of the territory. That is differentiated relief, boreal forests with thick undergrowth, stone runs, marshy tundra and so on. This increases the cost of the work. The use of large-scale airborne geophysical surveys is almost impossible for several reasons. Very high cost of using the carrier use (helicopters and planes). Detailed work requires a very low areal speed - below 10 m/s, and the high frequency of the magnetometer, above 100 Hz, which in turn dramatically reduces the accuracy of the survey. We propose to designate a special kind of low-altitude surveying at extremely low altitudes using a high-frequency magnetometer. Designed specifically for this type of surveys, our magnetometer complex has a frequency greater than 1.5 kHz, and the accuracy of the measurement system of the entire field is not less than 1 nT. The surveying complex is designed on base of light and ultralight drones. Experimental work on various objects (from archaeological to geological: burial mounds, skarn deposits, kimberlite pipes, geological mapping of volcanic and sedimentary rocks, etc.) has shown high efficiency of this survey type. High performance and low cost combined with the level of details in results, comparable to surveying on foot at high altitude flights, and exceeding it at low altitudes.

Original languageEnglish
Title of host publication7th EAGE Saint Petersburg International Conference and Exhibition
Subtitle of host publicationUnderstanding the Harmony of the Earth's Resources Through Integration of Geosciences
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Pages249-253
Number of pages5
ISBN (Electronic)9781510822498
DOIs
Publication statusPublished - 2016
Externally publishedYes
Event7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences - Saint Petersburg, Russian Federation
Duration: 11 Apr 201614 Apr 2016

Publication series

Name7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences

Conference

Conference7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences
CountryRussian Federation
CitySaint Petersburg
Period11.04.201614.04.2016

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