Geological and petrographical features of the Çatmakaya (Seydişehir-Konya) bauxite deposit [Çatmakaya (Seydişehir-Konya) boksit yata?inin jeolojik ve petrografik özellikleri]
Yükleniyor...
Tarih
2003
Yazarlar
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The upper Cretaceous Katrangedi?i formation comprising carbonaceous rock occurs at the base of the bauxite in the study area, which is located 30 km to the south of Seydişehir and 500 m to the west of the Çatmakaya village. The Upper Cretaceous (Senonian - Maestrichtian) Do?ankuzu formation lies on the bauxite deposited in the karstic openings at the upper part of the Katrangedi?i formatoin. These units are overlain discomformably by the Paleocene Yarpuz formation, the Eoecene A?açtepesi formation, and rocks of the Bozkir Unit (Bozkir melange) replaced to the sudy area by napping. The Çatmakaya bauxite deposit has a lens shape with 50 to 200 m in dimension aligned to NE-SW. The deepest part of the paleo-sinkhole, in which ore was deposited is 10 m and tha average tickness of ore deposit is about 3 m. The Çatmakaya bauxite is boehmitic. Besides boehmite, the one involves little amount of kaolinite, diaspore, hematite, goethite, limonite, pyrite, marcasite, anatase, rutile, quartz, tridymite and calcite in the ore deposit. According to this mineralogical composition, the Çatmakaya bauxite ore does not show important differences from other ore deposits around Seydişehir. Five types of mineralization were identified in the studied ore deposits. These are massive, oolitic - pysolithic, clayey, iron -bearing and brecciated bauxites. Oolitic - pysolitic mineralization occurs everywhere in the ore deposit. Brecciated mineralization are commonly observed near the limestones above and below the ore deposit, while iron-bearing and clayey bauxited intensified at the lower part of the ore deposits. The common presence of boehmite in the ore deposit indicates that the temperature of the environment was over 155°C. The presence of pyrite points the hematite suggests that Eh of the environment was below -0.3 and goethite and psilomelan points that the pH of the environment was higher than 7, respectively.
Açıklama
Anahtar Kelimeler
Bauxite, Boehmite, Çatmakaya, Karst, Seydişehir
Kaynak
Yerbilimleri
WoS Q Değeri
Scopus Q Değeri
Q4
Cilt
Sayı
28
