Abstract
The nature and subsurface structure of the slip surface of a landslide was studied on the basis of geochemical analyses and 2-D electrical resistivity tomography (ERT) survey. Head scarp and lateral slip surfaces of the landslide marked by clear slickensided shear planes were composed of the average amounts of clayey silt (32.5%) and sand (67.5%). Energy dispersive X-ray spectroscopy (EDX) data revealed the enrichment of Si (23.24%), Fe (12.2%), Al (9.51%) and C (8.34%) in the elemental composition of the disturbed slip surface. From X-ray diffractometry (XRD) data, six main clay types were determined, such as Volkonskoite, Halloysite, Ferrosilite, Saponite, Illite and Nontronite. The ERT survey displayed that the landslide developed as a reactivation on the upper part of an old landslide body.
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Acknowledgments
We thank Ercan Bilir and Muhammed Zeynel Öztürk for fieldwork assistance and Ali Sungur for his effort in grain-size analyses. Drs. Emin U. Ulugergerli and Süha Özden are thanked for their useful suggestions. We also thank Dr. Tolga Bekler for his permission to use the resistivity meter in this research. This study was carried out thanks to the financial support provided by Çanakkale Onsekiz Mart University Research Foundation (Project number: 2008/32). Journal reviewers are thanked for their valuable comments that greatly improved the paper.
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Erginal, A.E., Öztürk, B., Ekinci, Y.L. et al. Investigation of the nature of slip surface using geochemical analyses and 2-D electrical resistivity tomography: a case study from Lapseki area, NW Turkey. Environ Geol 58, 1167–1175 (2009). https://doi.org/10.1007/s00254-008-1594-4
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DOI: https://doi.org/10.1007/s00254-008-1594-4