Investigation of the nature of slip surface using geochemical analyses and 2-D electrical resistivity tomography: a case study from Lapseki area, NW Turkey |
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Authors: | Ahmet Evren Erginal Beyhan Öztürk Yunus Levent Ekinci Alper Demirci |
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Institution: | (1) Department of Geography, Canakkale Onsekiz Mart University, Canakkale, Turkey;(2) Department of Geophysics, Canakkale Onsekiz Mart University, Canakkale, Turkey |
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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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Keywords: | Landslide Slip surface material Geochemical analysis ERT Rotational slide Lapseki |
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