HR: 0800h
AN: V41B-1450    [Abstracts]
TI: The Role Of Low-Pressure Fractination In The Petrogenesis Of The Kula Volcanic Province, Western Turkey
AU: Kilinc, A I
EM: Attila.Kilinc@uc.edu
AF: Univ of Cincinnati, Department of Geology, Cincinnati, OH 45221-0013 United States
AU: * Solpuker, U
EM: solpuku@email.uc.edu
AF: Univ of Cincinnati, Department of Geology, Cincinnati, OH 45221-0013 United States
AB: Experimental data show that diversity of alkaline rocks in different tectonic environments is controlled by low-pressure fractionation of their magmas. In order to test this hypothesis we studied the alkaline rocks of the Kula Volcanic Province (KVP) in western Turkey. KVP experienced three episodes of volcanic activity (Burgaz Volcanism (1.1 ma), Elekcitepe Volcanism (0.3 ma) and Divlittepe Volcanism (0.03 ma)), which exposed the alkaline volcanic rocks of KVP to north of the Alasehir graben. An area of approximately 300 km² exhibits a volcanic rock suite of basanites, phonotephrites, tephriphonolites and trachybasalts. Major, trace and REE modeling of the Quaternary alkaline volcanic rocks of the Kula Volcanic Province (KVP), show that chemical spectrum shown by the rocks is the result of low-pressure fractionation of parental magmas. Bulk compositions of the KVP rocks, when projected on the normative pseudoternary olivine - clinopyroxene - nepheline diagram, follow a path parallel to and just below of the experimentally derived 1 atmosphere cotectic. This further supports the conclusion that KVP rocks represent low-pressure fractionation of alkaline parental magmas of the KVP.
DE: 8410 Geochemical modeling (1009, 3610)
DE: 8415 Intra-plate processes (1033, 3615)
DE: 8439 Physics and chemistry of magma bodies
SC: Volcanology, Geochemistry, Petrology [V]
MN: Fall Meeting 2005