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Engineering geological mapping of gypsiferous formations, Sivas, Central Eastern Turkey

  • Irfan T. Y. 
  • Özkaya I. 
Symposium on Engineering Geolgoical Problems of Construction on Soluble Rocks

Abstract

Preliminary engineering geological investigation has been carried out for a proposed railway route in Central Eastern Turkey. The area is dominantly composed of Pliocene clastic deposits and Oligo-Miocene evaporitic formations overlying older rocks of flysch and limestones. Problems caused by the engineering characteristics of gypsum, anhydrite and halite, which should be taken into consideration in any kind of engineering work, are discussed. Engineering geological mapping of the gypsiferous formations is complicated due to the complex distribution of different lithologies resulting from variable mode of occurrence of gypsum/anhydrite, widespread karstic solution phenomena, tectonic deformation and the deformation caused by anhydrite to gypsum transition.

Keywords

Sandstone Shale Gypsum Anhydrite Engineering Geological Mapping 

Leve des cartes geotechniques dans les formations gypseuses, situees a Sivas, Turquie Cetre-Est

Résumé

Des études géotechniques préliminaires ayant pour but la construction d'une nouvelle voce ferreé ont été entreprises en Anatolie Centrale orientale. La région consiste principalement de dépôts détritiques pliocènes et de séries évaporitiques oligo-miocènes surmontant un flysch et des calcaires. Une breve revue des problèmes géotechniques causés par la présence de gypse, anhydrite et halite est présentée. Les levés des cartes géotechniques sont compliqués par la distribution complexe des lithologies résultant des conditions varieés de gisement du gypse et de l'anhydrite, des phénomènes de dissolution karstique intense, des déformations techniques, anisi que des déformations survenues lors de la transformation de l'anhydrite au gypse.

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Copyright information

© International Association of Engineering Geology 1981

Authors and Affiliations

  • Irfan T. Y. 
    • 1
  • Özkaya I. 
    • 1
  1. 1.Department of Geological EngineeringMiddle East Technical UniversityAnkaraTurkey

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