Chemical, mineralogical and ceramic properties of rhyolitic tuff from Arabaalan – Elmalı (Biga) district (Biga Peninsula – Turkey)

Çalık A., Erçetin Akyar Y.

the 23rd INTERNATIONAL APPLIED GEOCHEMISTRY SYMPOSIUM (IAGS), Oviedo, Spain, 14 - 19 June 2007, pp.126-137

  • Publication Type: Conference Paper / Full Text
  • City: Oviedo
  • Country: Spain
  • Page Numbers: pp.126-137
  • Çanakkale Onsekiz Mart University Affiliated: Yes


Rhyolitic tuff is an important preferential raw material because it is used as

alkaline and silica-containing materials. Additional to that, It is easy to

exploit, and is cheaper than many other raw materials. Rhyolitic tuffs crop

out in the Arabaalan – Elmali district (Southeast of Biga village, the Biga

Peninsula) were investigated in order to assess their potential in the

ceramic industry. The Parent rock types of this raw material are Early -

Middle Miocene aged, calcalkalen Biga volcanics are composed of mainly

rhyolite – rhyodacite lava, tuff, ignimbrite, and perlite at the base and

andesite lavas above.

Chemical and mineralogical analyses were performed on representative

samples by XRD and XRF methodologies. The chemical analyses

generally show high silica, low alumina, and low iron contents. The total alkali

content of the Arabaalan rhyolitic tuff is about 4.96 – 8.02 %. The main

mineralogical association consists of quartz, sanidine, albite and biotite

with kaolinite, montmorillonite, illite and opaque mineral. Sericite and

calcite excite as a secondary mineral.

Colour measurement, viscosity, firing shrinkage, water absorption was

tested by mineralogical and the thermal analysis techniques (TG – DTA)

and their firing behavior was investigated. From these studies it was

understood that the Arabaalan – Elmali rhyolitic tuff could be used for

ceramic industry, floor tile