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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 6, issue 2
Nat. Hazards Earth Syst. Sci., 6, 315–322, 2006
https://doi.org/10.5194/nhess-6-315-2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: Slope movements in weathered materials: recognition, analysis...

Nat. Hazards Earth Syst. Sci., 6, 315–322, 2006
https://doi.org/10.5194/nhess-6-315-2006
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  08 May 2006

08 May 2006

Chemical and mineralogical heterogeneities of weathered igneous profiles: implications for landslide investigations

N. S. Duzgoren-Aydin and A. Aydin N. S. Duzgoren-Aydin and A. Aydin
  • Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China

Abstract. Landslides in tropical and sub-tropical regions are generally associated with weathered rock profiles which often possess chemical and mineralogical heterogeneities at material- and mineral-scales. Such heterogeneities reach a climax by the occurrences of oxyhydroxide- and clay-rich zones. Weakness and low permeability of these zones makes them ideal for the development of slip zones along which landslides take place. This paper describes the nature and distribution of chemical and mineralogical heterogeneities within weathered profiles developed from felsic igneous rocks in Hong Kong. It sets out the use of integrated geochemical and mineralogical studies to improve understanding of the development of critical heterogeneities and hence to predict their types and presence in a given weathered profile.

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