YER RADARI (GPR) YÖNTEMİ İLE BİR MERMER SAHASINDAKİ KALINLIK VE SÜREKSİZLİKLERİN BELİRLENMESİ

Bu çalışmada dekorasyon kayacı olan mermer içindeki kırık-çatlak yapılarının aranmasına yönelik yeni bir uygulama tanıtılmaktadır. Yer radarı (GPR) yöntemi, Sivas-Gürün ilçesi Tilkihüyük bölgesinde, bir mermer tabakası içerisindeki kırık ve boşlukları belirleme ve derinliğe göre haritalamada başarıyla uygulanmıştır. Araştırma bölgesi farklı ölçekte boşlukları içeren çok az quartz ve silikat minerallerini kapsayan Üst Miyosen-Pliyosen yaşlı gölsel kireçtaşlarından oluşur. Çalışmanın amacı bir mermer bölgesindeki ocak işletimini doğru yönlendirmek için çok kısa bir zamanda sağlam işletilebilir mermer bölgelerini kırıklı ve diğer bozuk bölgelerden ayırmaktır. 100*100 m2 lik bir alanda GPR verisi toplamak için 5m aralıklı, 100m boyunda 21 adet paralel profil hatları belirlendi. Her bir profilde ölçümler 10cm aralıklarla alındı. 2B verileri işlendikten sonra 3B GPR veri bloğu üzerinden sabit derinlik dilimleri elde edildi. Sonuç olarak mermer tabakasının kalınlık değişimi, görülemeyen kırıkları, boşlukları, sağlam ve bozuk alanları bir kuyu verisine gerek kalmadan belirlendi.

Anahtar Kelimeler:

GPR (Yer radarı), Petrografi, Gölsel kireçtaşı, Tilkihüyük.

Determination of Thicknesses and Discontinuties in A Marble Area by Ground Penetrating Radar (GPR) Method

A new application on a marble layer which is ornamental stones is described in this study. Ground Penetrating Radar (GPR) were succesfully applied to detect and map fractures and cavities in a marble layer according to depth in Sivas City Gürün Town Tilkihüyük region. The research area is represented by Upper Miocene-Pliocene lacustrine limestone and mainly composed of calcite with rare amount of quartz and calcedoney including some cavities with different sizes. The aim of this research is to distinguish quickly inact marketable marble areas from fractured ones in order to improve quarry management. 21 parallel profiles, which were 100m lengths, of 5m interval were defined to take the GPR measurements. Measurement station interval set 10cm on each profile. Following data processing on the parallel 2D profiles, constant depth slices were obtained from constructed 3D GPR data block by using the parallel profiles. Finally, Marble layer tichness variations, non-distinguishable fractures, cavities and high-or low-quality marble areas were determined on 2D profiles and depth slices of 3D block without using borehole.

Keywords:

GPR, Petrography, Lecustrine limestone, Tilkihüyük.,

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