75. Uluslararası Katılımlı Türkiye Jeoloji Kurultayı, Ankara, Turkey, 10 - 14 April 2023, pp.1
In this study, the geology and mineralogy of Yenice opals that outcrop in the southeast of the village of Yenice (Çanakkale), were investigated. Red, yellow, and beige-colored opals are composed mainly of opal CT on the basis of the XRD analyses. SEM images show that the internal structure of the Yenice opal consists mainly of spherulitic texture. In Yenice opal, the major element composition of the opal by SEM reveals that opals mainly comprise silica. Si and O elements are also accompanied by Al, Fe, and Ca. The red opal has a concentration of Fe with Cu and Ti accompanying Si and O elements.
Yenice opals are found parallel to the fault zone in the region
in the form of veins formed as a result of hydrothermal alteration due to
dacite composition lavas belonging to Ezine volcanic. This fault might have served as a fracture
system that provided pathways for the circulation of low-T silica - rich
hydrothermal solutions in the region
Yenice opalleri damar şeklinde, bölgedeki fay zonuna paralel, Ezine
volkanitlerine ait dasit bileşimli lavlara bağlı olarak hidrotermal
alterasyon sonucu gelişmiştir.