Çağalalı ve Bezardağı (Adıyaman) Mangan Cevherleşmesinin Jeokimyasal Özellikleri

İnceleme alanı Adıyaman-Çelikhan ilçesine bağlı Çağalalı ve Bezardağı çevresini kapsar ve Güneydoğu Anadolu Orojenik kuşağı içerisinde Arap platformu üzerine Üst Kretase'de bindirmiş olan Koçali Karmaşığı içerisinde bulunmaktadır. İnceleme alanında temeli, bölgeye gravite kaymalarıyla yerleşmiş olan allokton konumlu Koçali karmaşığı'na ait spilitik yastık lavlar (Tarasa formasyonu) ile radyolaritler (Konak formasyonu) oluşturmaktadır. Koçali karmaşığı'nın üzerine ise Germav formasyonu ile Gercüş formasyonu uyumsuzlukla gelmektedir. Cevherleşmeler, Koçali karmaşığı içerisinde, ofiyolitik istifin üst seviyelerini temsil eden volkanosedimanter birim içerisinde yer alan radyolaritler içerisinde düzensiz mercekler ve D-B/30K konumlu tabakalar şeklinde olup yan kayaçlarla genellikle uyumludur. Cevherleşme parajenezi olarak; pirolusit, psilomelan, hausmanit ve hollanditten oluşmuştur.Cevherleşmeler jeokimyasal olarak incelendiğinde ana oksit içerikleri denizaltı hidrotermal yataklara benzemektedir. Fe/Mn oranı 0,001-0,019 aralığında değişmekte olup, oldukça düşüktür. Çağalalı ve Bezardağı Mangan cevherleşmeleri; ana oksit içerikleri, arazideki konumu ve jeokimyasal analizler sonucu hidrotermal oluşumlu olduğu düşünülmektedir.

The Geochemical Features of Manganese Mineralization in Çağalalı and Bezardağı (Adıyaman)

Area of examination covers the surrounding of Çağalalı and Bezardağı which are bound to Adıyaman-Çelikhan district. This location is defined as Kocali complex bestrides on Arab platform within Southeastern Anatolia orogenic belt in Upper cretaceous period. In the area of examination the foundation consists of spilitic pillow lava (Tarasa formation) and radiolaritines (Konak formation) belonging to allochthonous positioned Kocali complex which was settled in this area by gravity shift. On Koçali complex, Germav and Gercus formations take place with non-accordance. Mineralizations take place within Kocali complex in radiolarites as irregular lenses and E-W/30N located plates which are in volcano sedimentary unit representing upper layers of ophiolitic mass and are generally in accordance with lateral rocks. As mineralization paragenesis, the included materials are pirolusit, psilomelan, hausmanit and hollandit.When mineralizations were examined geochemically main oxide contents (MnO: 8.98-73.64%, SiO2: 3.26-86%) are similar to submarine hydrothermal beds. Fe/Mn ratio varies between 0.001-0.019 interval and is very low. Çağalalı and Bezardağı manganite mineralizations are considered to have hydrothermal formation as a result of main oxide contents, position in terrain and geochemical analyses.

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