Mapping bedrock topography and moraine deposits by transient electromagnetic sounding: Oslo graben, Norway

Barsukov, P.; Fainberg, E.

Авторы: Barsukov P., Fainberg E.
Журнал: Near Surface Geophysics
Том: 17
Номер: 5
Год издания: 2019
Издательство: European Association of Petroleum Geoscientists and Engineers
Местоположение издательства: Netherlands
DOI: 10.1002/nsg.12070
Аннотация: In this research we have studied the capabilities and limitations of the transient electromagnetic (TEM) sounding applied to investigate the structure and composition of the moraine deposits covering a crystalline basement. It has been experimentally demonstrated that using the ungrounded antennas, one can not only determine the electrical resistivity of different layers in the alluvium deposits and map the surface topography of the crystalline basement down to a depth of 70–100 m, but can also minimize the costs and the damage done to the environment. Additionally, TEM helps to reveal the layers within the moraine strata that often have different resistivities and depths. The use of single antennas of size 12 × 12 ‐ 25 × 25 m for field excitation and registration of transient responses allows for maximum localization of the targets and provides a high horizontal resolution in strongly heterogeneous media. The limitations of the method due to the induced polarization effect have also been investigated. Overall, despite some limitations, the TEM method appears to be effective in the mapping, assessment and analysis of hazards in landslide‐prone areas, prior to geotechnical soundings in wells. This article is protected by copyright. All rights reserved
Добавил в систему: Файнберг Эдуард Борисович

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИПМех РАН

Mapping bedrock topography and moraine deposits by transient electromagnetic sounding: Oslo graben, Norwayстатья

Прикрепленные файлы