TY - JOUR T1 - Thermal Reaction Of Antigorite: A XRD, DTA-TG Work AU - Gürtekin, Gökçe AU - Albayrak, Mustafa PY - 2006 DA - February JF - Bulletin of the Mineral Research and Exploration JO - Bull.Min.Res.Exp. PB - Maden Tetkik ve Arama Genel Müdürlüğü WT - DergiPark SN - 0026-4563 SP - 41 EP - 49 VL - 133 IS - 133 LA - en AB - It is very important to determine the stability limits of serpentine minerals for investigation of geologicprocesses taking place in the oceanic lithosphere which consists of serpentinized peridotites. As a result oftemperature increase in the subducting oceanic lithosphere, thermal decomposition of serpentine minerals andnew mineral formations have a great effect on geologic processes related to subducting plate. In this study, serpentineminerals (antigorite) collected from the Konya-Çayýrbaðý region were dehydrated under constant atmosphericpressure, then mineralogical changes were determined by using X-Ray diffraction and DTA-TG analysesand finally the stability limits of antigorite was determined. Dehydration reactions on antigorite started at approximately100-150°C, dehydroxilation reactions started at approximately 550°C and beyond this temperatureforsterite started to crystallize from antigorite+brucite. Association of antigorite+forsterite continued until 650°C atwhich enstatite started to be formed. During all the reactions, which were carried out at the atmospheric pressure,talc was not formed but some H2O and amorphous silica were released. Dehydroxilation reaction on antigoriteoccurred between 550°C and 690°C and antigorite was stable until 650°C-690°C. KW - XRD KW - DTA-TG KW - Antigorite KW - Dehydration KW - Dehydroxilation CR - Bucher, K. and Frey, M. 1994, Petrogenesis of Me- tamorphic Rocks, sixth Edition, 318 pp. CR - Evans, B.W. 1977 Metamorphism of Alpine peri- dotites and serpentinites, Annual Review Earth Planetary Science, 5, 397-448 CR - Gürtekin, G. 2001 Mineralization stages of serpen- tinites in Çayýrbaðý (Konya) Ophiolites, Hacet- tepe University The Institute for Graduate Studies in Science and Engineering, M.Sc. Thesis, 93 page (unpublished) CR - McKenzie, R. C. 1970 Differential Thermal Analysis, Volume 1, Fundamental Aspects, Academic Press Inc. (London) LTD. 775 pp. CR - O'Hanley, D.S. 1991 Fault-Related phenomena asso- ciated with hydration and serpentine recrystal- lization during serpentinization, Canadian Mi- neralogist, 29, 21-35 CR - O'Hanley D. S. 1996 Serpentinites-Records of Tec- tonic and Petrological History, Oxford Mono- graphs on Geology and Geophysics No.34 CR - Özcan, A., Göncüoðlu, M. C., Turhan, N., Þentürk, K. C. and Uysal, Þ. 1986 Geology map of the Konya-Altýnekin-Kadýnhaný ve Ilgýn Regions, MTA Map. CR - Özcan, A., Göncüoðlu, M. C., Turhan, N., Þentürk, K. C. and Uysal, Þ. 1990 Geology of the Konya- Altýnekin-Kadýnhaný ve Ilgýn Regions, MTA Report No: 9535 (unpublished). CR - Ulmmer, P. and Trommsdorff, V. 1995 Serpentine sta- bility to mantle depths and subduction-related magmatism, Science, 268, 858-861 CR - Wicks, F.J. and Whittaker, E.J.W. 1977 Serpentine textures and serpentinization, Canadian Mine- ralogist, 15, 459-488 CR - Wunder, B. and Schreyer, W. 1997 Antigorite: High- pressure stability in the system MgO-SiO2-H2O (MSH), Lithos, 41, 213-227 UR - https://dergipark.org.tr/tr/pub/bulletinofmre/issue//52404 L1 - https://dergipark.org.tr/tr/download/article-file/44710 ER -