This work is aimed at differentiation of ophiolitic mélange rocks which were outcropped 60 km far from Sivas city
center using image processing and spectral measurement methods. These rocks are known as oceanic crust remnants
which were made up of different rocks. Turkey hosts several paleo-oceans and their realms in Alpine-Himalayan
orogenic belt. The Neotethyan ophiolites in Turkey are characterized by supra subduction zone (SSZ-type) ophiolites.
Ophiolitic rocks are generally coloured with greenish tones and human eye could not separate these tone differences. But
satellite images such as ASTER can realize these separation utilizing spectral enhancement methods such as
classification and decorrelation stretching. Chromite is a valuable mineral and is formed in only ophiolitic rocks. Dunites
and harzburgites named as also ultramafic tectonits of ophiolitic serie mainly contain these deposits in study area. In this
study, an approach was also realized to find target regions of chromite deposits with the aid of spectral methods. Spectral
measurements were realized to determine boundaries between different mélange rocks using spectroradiometer.
Reflectance curves collected from field and laboratory analysis were evaluated together and compared with ASTER
image of the study area respectively. A detailed differentiation generally was accompanied with petrographic and