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    A geochemical and geostatistical approach to the origin of the Çatmakaya (Seydişehir-Türkiye) bauxite deposit [Çatmakaya (Seydişehir - Türkiye) boksit yata?inin kökenine jeoistatistiksel ve joekimyasal bir yaklaşim]
    (2006) Karada? M.M.; Arik F.; Öztürk A.
    The Çatmakaya bauxite deposit occurs in a karstic depression at the top of the Cenomanian limestone, namely the Katrangedi?i formation, and is overlain by the Senonian limestones of the Do?ankuzu formation. These formations are tectonically overlain by the ophiolitic slices of the Bozkir unit mainly comprising diabase-dolerite, serpentinite, radiolarite, limestone and cherts with tectonic contact emplaced during the Late Eocene-Early Miocene period. In order to determine the possible source rocks of the Çatmakaya bauxite deposit, the samples collected from limestones, ophiolites, bauxite ore and terra-rossas were geochemically and geostatistically analysed. Based on the analysis results of ophiolite samples, the strong positive correlations were found between the Al2O3-CaO pair, different stable elements ratios, and regression line deviation from origin on the stable elements scattering diagram indicate that ophiolites can not be the source rocks of the bauxites. When the fact that the bauxites were derived from limestones is taken into account, an intermediate-products is needed to explain the geochemical behaviour of some elements. In this case, the terra-rossa in the intermediate-product. During the course of the transformation from limestone to terra-rossa, increases in Si and K were 77 - fold the following elements were by multiples of the numbers following them in the list: Zr 60, Ti 50.5, Fe 45.5, Al, Cu, Ga, Nb and Th 37-40, Pb 21, Cr 19.6, Na 14, V 11, Ni 9.3, Mg 7.5 and Zn 2.5 times. While all these elements show increases, Ca decreased 20.1 times. During the transition from terra-rossa to bauxite, and causing the same convention for indicating increases whereas Ca 30.7, Mg 26.5, Na 17.9, Si 11, Zn 13.8, Cu 8.7, K 8.6 and P 7.5 decreased, Al 3.04, Fe 2.14, Ti, Cr Al-Fe and Al-Si in the carbonate rocks and in terra-rossa which derived from them, and the strong negative correlation between Ca-Al, Ca-Si and Ca-Ti indicates that Al, Fe, Si and Ti and Ca have originated from different source. The coeffitic correlation dendograms also support this. However, while stable elements ratios (Al/Ti, Al/Th, AI/Zr, Ti/Zr, Ti/Ga, Ti/Nb, Ti/Th, Ga/Nb, Ga/Th, Ga/Zr, Nb/Th, Nb/Zr, Th/Zr) of carbonate rocks, terra-rosas and bauxites of the Çatmakaya area are similar, those of ophiolitic rocks are different. If the elements of bauxites and probable provenance rocks are evaluated all together, the correlation coefficients of Al-Fe,Al-Ti, Al-Ga, Al-Nb, Al-Th, AI-Zr, Ti-Ga, Ti-Nb, Ti-Th, Ti-V, Ti-Zr, Ga-Nb, Ga-Th, Ga-Zr, Nb-Th, Nb-Zr and Th-Zr element pairs show very high positive (>0.95) correlation. In the scatter diagrams of the elements, regression lines pass through the origin and terra-rossas located between the carbonate rocks and bauxites. Based on these data, it can be stated that the source rock of the Çatmakaya bauxite is terra-rossa which is derived from the nearby carbonated rocks.
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    Geological and petrographical features of the Çatmakaya (Seydişehir-Konya) bauxite deposit [Çatmakaya (Seydişehir-Konya) boksit yata?inin jeolojik ve petrografik özellikleri]
    (2003) Karada? M.M.; Temur S.; Arik F.; Öztürk A.
    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.
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    Geological investigation of the Cariksaraylar - Kozlucay area (Isparta-Turkye)
    (2008) Bozkir Y.; Ayhan A.; Arik F.
    The study area is located in southeastern part of Sultandaglari, 50 km to the northeast of Isparta. The geological units exposed in the area are: The Lower-Middle Cambrian Caltepe Formation, which comprises grey and pink coloured recrystallized limestone, nodular limestone, dolomitic limestone and dolomite, is the oldest unit. The Upper Cambrian - Lower Ordovician Seydisehir Formation conformably overlies the Caltepe formation and comprises green to brown coloured metasandstone, quartzite, phyllite, calcshists, schist. The Upper Jurassic Mezardere formation lies with an angular unconformity on the Seydişehir Formation and comprises dolomite, dolomitic limestone and limestone. The Upper Jurassic İslikayatepe volcanite is composed of volcanite, partly weathered volcanite and autochthonous bauxite. The bauxite occurrences are aligned generally in NW-SE direction and seen in two or three levels depending on the localities. The Upper Cretaceous Aktassirti limestone consists mainly of limestone with dolomitic level. The Miocene lacustrine Bagkonak formation consists of cream and orange coloured, poorly sorted conglomerates, mudstones, claystones, sandstones and sandy limestones. Locally Recent alluvium is seen.
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