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Öğe CHARACTERISTICS OF THE ALANYA UNIT METAMORPHITES, ALANYA-ANTALYA, TURKEY(INT SCIENTIFIC CONFERENCE SGEM, 2009) Kansun, Gursel; Bas, Halil; Asan, Kursad[Abstract not Available]Öğe Geology and petrography of the Masatdagi diasporic bauxites, Alanya, Antalya, Turkey(PERGAMON-ELSEVIER SCIENCE LTD, 2006) Temur, Sedat; Kansun, GurselThere are more than fifteen bauxite outcrops in the study area located in the southern part of the Central Taurides. The bauxites are developed in the Upper Permian Cebireis Formation (carbonate rocks interbedded with schist) and Lower Triassic Asmaca Formation (limestone, dolomite, quartzite and schist). The bauxite outcrops are observed as parts of two or three independent bauxite blocks that were broken apart by faulting and an erosional surface. Based on outcrop appearances, four ore types can be defined; black, earthy, clayey, and Fe- and Mn-bearing bauxites. Oolitic textures are common in all ore types, except the earthy ones. Bauxites are represented by a mixture of diaspore and clay in varying proportions. Diaspore, boehmite, gibbsite, corundum, hematite, goethite, amorphous iron hydroxide, magnetite, chamosite, pyrite, marcasite, psilomelane, rutile, kaolinite, illite, muscovite, hydro-muscovite, chlorite, chloritoid, rectorite, ephesite, albite, microcline, quartz, K-Mg-Al silicate, hydrated K-Al silicate, and dolomite are present in the ore paragenesis. Bauxites, which are observed at or near the contact between the Cebireis and Asmaca formations, are thought to be fillings of cavities within and/or on Late Triassic-early Cretaceous carbonate rocks. (c) 2005 Elsevier Ltd. All rights reserved.Öğe Magma mixing/mingling in the Eocene Horoz (Nigde) granitoids, Central southern Turkey: evidence from mafic microgranular enclaves(SPRINGER WIEN, 2011) Kocak, Kerim; Zedef, Veysel; Kansun, GurselMafic microgranular enclaves (MMEs) are widespread in the Horoz pluton with granodiorite and granite units. Rounded to elliptical MMEs have variable size (from a few centimetres up to metres) and are generally fine-grained with typical magmatic textures. The plagioclase compositions of the MMEs range from An(18)-An(64) in the cores to An(17)-An(29) in the rims, while that of the host rocks varies from An(17) to An(55) in the cores to An(07) to An(33) in the rims. The biotite is mostly eastonitic, and the calcic-amphibole is magnesio-hornblende and edenite. Oxygen fugacity estimates from both groups' biotites suggest that the Horoz magma possibly crystallised at fO(2) conditions above the nickel-nickel oxide (NNO) buffer. The significance of magma mixing in their genesis is highlighted by various petrographic and mineralogical characteristics such as resorption surfaces in plagioclases and amphibole; quartz ocelli rimmed by biotite and amphibole; sieve and boxy cellular textures, and sharp zoning discontinuities in plagioclase. The importance of magma mixing is also evident in the amphiboles of the host rocks, which are slightly richer in Si, Fe3+ and Mg in comparison with the amphiboles of MMEs. However, the compositional similarity of the plagioclase and biotite phenocrysts from MMEs and their host rocks suggests that the MMEs were predominantly equilibrated with their hosts. Evidence from petrography and mineral chemistry suggests that the adakitic Horoz MMEs could be developed from a mantle-derived, water-rich magma (> 3 mass%) affected by a mixing of felsic melt at P > 2.3 kbar, T > 730A degrees C.Öğe NUMERICAL ANALYSIS OF WATER WELL DRILLING SECTOR OF TURKEY(INT SCIENTIFIC CONFERENCE SGEM, 2008) Bayram, A. Ferhat; Ozdemir, Adil; Ucgun, Fatih; Kansun, GurselPerforming a numerical analysis of water well drilling sector of Turkey was aimed in this study. Within this purpose, number of the machinery in equipment pool of the institutions and companies which are involved in the water well drilling, yearly drilling quantities, drilling equipment preferences and geological data of 2640 water well drilling boreholes opened in 73 provinces between the years of 1998 - 2006 and the results below have been reached: The Municipalities in Turkey meet 95% of their drinking water needs (70% of the population of Turkey namely 49 million people) from groundwater as 60% from wells, 35% from spring water and 5% (30% of the population of Turkey namely 21 million people) by purifying fro surface water. 98% of the villages meet their drinking water needs from groundwater. Such need is being met as 85% from spring water, 13% of from wells, 2% from rivers, dams, lakes and lagoons. Yearly water well drilling need in Turkey is around 18,100 wells and 1,705,000 m. Water well drilling borcholes are opened in Turkey as 50% at old or new river bed alluvial deposits, 20% at limestone, 15% at volcanic rocks such as basalt, andesite, tuff, agglomerate, 10% at river basins where sandy, gravelly and clayey levels of lake beds are, 5% at rocks such as granite, diabase, serpentine. Water well drillings in Turkey approximately are at the depth of <50 m as 14.4%, 50 100 m as 36.6%, 101 - 149 m as 14.6%, 150 - 199 m as 22.3% 200 - 249 m as 7.1%, 250 - 299 m as 2.3%, 300 - 349 in as 1.2%, > 350 m as 1.5 It is observed that rotary drilling which is one of the water well drilling methods are being used as weighted in Turkey. This is caused by economical situations of drilling companies besides the geological conditions. However, it is observed that water well drilling sector's wish to use air drilling increased in recent years.
