Title
Geomorphological research of large-scale slope instability at Machu Picchu, Peru
Date Issued
15 September 2007
Access level
metadata only access
Resource Type
journal article
Author(s)
Vilímek V.
Zvelebil J.
Klimeš J.
Patzelt Z.
Kachlík V.
Hartvich F.
Instituto Nacional de Cultura
Abstract
A multidisciplinary approach has been adopted to study the slope movements and landscape evolution at the archaeological site of Machu Picchu and its immediate surroundings. The basic event in the paleogeomorphological evolution of the area was the large-scale slope movement, which destroyed the originally higher ridge between Mt. Machupicchu and Mt. Huaynapicchu. Within remnants of that primary deformation, several younger generations of slope movements occurred. The laboratory analyses of granitoids revealed highly-strained zones on the slopes of Mt. Machupicchu, which strongly affect the largest slope deformation. The borders of the largest slope deformation are structurally predisposed by the existence of fault zones. The majority of various types of slope movements on the so-called Front Slope (E facing) and Back Slope (W facing) are influenced by the alignment between topography and joints. Along with slope movements, fluvial erosion and tectonic disturbance of the rocks have been affecting the evolution of the landscape. A monitoring network for dilatometric and extensometric measurements was used to detect the present-day activity of rock displacements within the archaeological site. In addition to standard mapping of surface hydrogeological phenomena, eleven express slug tests were conducted to verify the infiltration potential of precipitation. The results of these surveys indicate that recent large-scale slope movement as suggested by some previous studies is doubtful, and the detected movements can be explained by individual movements of rock blocks or several other mechanisms including sinking of archaeological structures, subsurface erosion and annual changes in the water content of the soils. © 2007 Elsevier B.V. All rights reserved.
Start page
241
End page
257
Volume
89
Issue
April 3
Language
English
OCDE Knowledge area
Geografía física Geología
Scopus EID
2-s2.0-34447503751
Source
Geomorphology
ISSN of the container
0169555X
Sponsor(s)
Funding text The authors would like to thank the Ministry of Education, Youth and Sports of the Czech Republic (Projects MSM 00216 20831 and INGO, LA 157) for their financial support. Special thanks are due to INC Cusco and INRENA Cusco for scientific and personal support.
Sources of information: Directorio de Producción Científica Scopus