TY - JOUR

T1 - Peculiarities of Using 2D Electrical Resistivity Tomography in Caves

AU - Olenchenko, V. V.

AU - Tsibizov, L.

AU - Osipova, P. S.

AU - Chargynov, T. T.

AU - Viola, B. T.

AU - Kolobova, K. A.

AU - Krivoshapkin, A.

N1 - Publisher Copyright: © 2020 Siberian Branch of the Russian Academy of Sciences © 2020 Institute of Archaeology and Ethnography of the Siberian Branch of the Russian Academy of Sciences © 2020 V.V. Olenchenko, L.V. Tsibizov, P.S. Osipova, T.T. Chargynov, B.T. Viola, K.A. Kolobova, A.l. Krivoshapkin Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2020

Y1 - 2020

N2 - The efficiency of archaeological studies inside caves could be greatly enhanced by geophysical methods because of their potential for examining deposit structure andfeatures. Application of those methods in caves entails a number of problems caused by limited space for measurements and the complexity of the surrounding medium's structure as compared to above-ground measurements. In 2017, Selungur Cave in the Fergana Valley, Kyrgyzstan, was examined using electrical resistivity tomography. Because of the above concerns, in the course of the work the question of the reliability of the results arose. To clarify the issue, a numerical experiment was performed to assess the effect of the three-dimensional cave geometry on the results of a two-dimensional inversion. It was found that variations of cave geometry parameters result in unexpectedfalse anomalies, and considerable errors in bedrock location and resistivity can occur. In the case of downward diverging cave walls, an accurate resistivity section can be obtained by using the inversion based on a two-dimensional model. Therefore, electrical resistivity tomography in caves with similar geometry can yield reliable results concerning the shape of bedrock surface, the thickness of sedimentary layers, and size and position of inclusions such as fallen fragments of roof therein.

AB - The efficiency of archaeological studies inside caves could be greatly enhanced by geophysical methods because of their potential for examining deposit structure andfeatures. Application of those methods in caves entails a number of problems caused by limited space for measurements and the complexity of the surrounding medium's structure as compared to above-ground measurements. In 2017, Selungur Cave in the Fergana Valley, Kyrgyzstan, was examined using electrical resistivity tomography. Because of the above concerns, in the course of the work the question of the reliability of the results arose. To clarify the issue, a numerical experiment was performed to assess the effect of the three-dimensional cave geometry on the results of a two-dimensional inversion. It was found that variations of cave geometry parameters result in unexpectedfalse anomalies, and considerable errors in bedrock location and resistivity can occur. In the case of downward diverging cave walls, an accurate resistivity section can be obtained by using the inversion based on a two-dimensional model. Therefore, electrical resistivity tomography in caves with similar geometry can yield reliable results concerning the shape of bedrock surface, the thickness of sedimentary layers, and size and position of inclusions such as fallen fragments of roof therein.

KW - Archaeogeophysics

KW - geophysical studies

KW - inversion

KW - numerical modeling

KW - geoelectrics

KW - Selungur Cave

KW - Geophysical studies

KW - Numerical modeling

KW - Geoelectrics

KW - Inversion

UR - http://www.scopus.com/inward/record.url?scp=85105808252&partnerID=8YFLogxK

U2 - 10.17746/1563-0110.2020.48.4.067-074

DO - 10.17746/1563-0110.2020.48.4.067-074

M3 - Article

VL - 48

SP - 67

EP - 74

JO - Archaeology, Ethnology and Anthropology of Eurasia

JF - Archaeology, Ethnology and Anthropology of Eurasia

SN - 1563-0110

IS - 4

ER -