Investigation of the nature of slip surface using geochemical analyses and 2-D electrical resistivity tomography: a case study from Lapseki area, NW Turkey


Erginal A. E. , Öztürk B. , Ekinci Y. L. , Demirci A.

ENVIRONMENTAL GEOLOGY, vol.58, no.6, pp.1167-1175, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 6
  • Publication Date: 2009
  • Doi Number: 10.1007/s00254-008-1594-4
  • Title of Journal : ENVIRONMENTAL GEOLOGY
  • Page Numbers: pp.1167-1175
  • Keywords: Landslide, Slip surface material, Geochemical analysis, ERT, Rotational slide, Lapseki, SHEAR-STRENGTH, LANDSLIDES, RAINFALL, MOVEMENT, CLAY

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.