HYDROTHERMAL ALTERATION STUDY AND VOLCANIC ROCK PETROLOGY OF ÇANAKKALE-TUZLA GEOTHERMAL AREA

Year 1985, Volume: 103-104 Issue: 103-104, 15 - 15, 01.08.1985

A. İhsan Gevrek Mehmet Şener Tuncay Ercan

Abstract

Hydrothermal alteration zones have been investigated by
x-ray diffraction techniques and geochemical analysis. In studied area;
alunite, kaolinite, montmorillonite, illite, and silica zones have been recognized.
These hydrothermal alteration zones indicate that there are geothermal fluids
which have a temperature of 150-225Co in the reservoir. The tectonic structure
of studied area is developed by NW-SE and NE-SW directional forces. Geothermal
fluids coming from the diagonal cracks formed as a result of faults having a
strike of E-W and formed as a result of these forces have formed the necessary
environment for hydrothermal alteration. Volcanic rocks where hydrothermal
zones are observed in the studied area are of Lower-Middle Miocene age and are
represented by latite, andesite, dacite, rhyolite type lavas and tuff and
ignimbrites. With petrochemical studies it has been concluded that volcanites
are an inner continental volcanism having calc-alkaline with high potssium and
schoshonitic proporties and are shelf characteristic.

Keywords

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