Petrology of the magmatic rocks of Guleman Ophiolite

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Authors:Özkan, Yusuf Z.; Öztunali, Önder
Author Affiliations:Primary:
MTA Maden Etud Dairesi, Ankara, Turkey
Other:
Min. Res. Explor. Inst., Turkey
Istanbul Univ. Jeol. Muhendisligi, Turkey
Volume Title:Geology of the Taurus Belt
Volume Authors:Tekeli, Okan, editor; Göncüoglu, M. Cemal
Source:p.285-293; International symposium of the Geological Society of Turkey ; Geology of the Taurus Belt, Ankara, Turkey, Sept. 26-29, 1983, edited by Okan Tekeli and M. Cemal Göncüoglu. Publisher: Maden Tetkik ve Arama Enstitüsü, Ankara, Turkey
Publication Date:1984
Note:In English. 28 refs.; illus. incl. 4 tables, sect., geol. sketch map
Summary:The Guleman ophiolite is a sliced and incomplete succession made up of ultramafic tectonites at the base, with ultramafic-mafic cumulates lying on them unconformably. In addition, pyroxenite, gabbro, diabase dykes cutting these rock units and volcanic rocks that are thought to be generally related to the ophiolite in their geochemical characteristics, are observed as a separate tectonite slice. Tectonites mainly consist of harzburgite and dunite and show plastic deformation, partial melting and recrystallization which can only be attained at mantle P-T conditions. The main rock-forming minerals of these rock types, olivine and orthopyroxene, have rather narrow compositional ranges. Cumulates showing structures and textures created by crystal segregation constitute an assemblage starting with dunite and grading into wehrlite, clinopyroxene and bedded gabbro. Apart from the deformation coeval with the sedimentation like cross-bedding, slumping and synsedimentation faults, there are no signs of deformation (including inner crystalline deformation). The cumulate assemblage observed in Guleman show a cooling sequence starting with small amounts of chromite with high percentages of olivine, clinopyroxene, plagioclase, hornblende and quartz. Texture, mineralogy and chemistry of the above rocks are discussed and their characteristics compared to other ophiolites. [C.N.]
Subjects:Chain silicates; Chromite; Clinopyroxene; Cumulates; Deformation; Field studies; Gabbros; Igneous rocks; Nesosilicates; Olivine; Olivine group; Ophiolite; Orthopyroxene; Orthosilicates; Oxides; Petrology; Plastic flow; Plutonic rocks; Pyroxene group; Silicates; Tectonite; Ultramafics; Asia; Middle East; Turkey; Arabian Platform; Elazig; Guleman Ophiolite; Lice Formation
Coordinates:N384000 N385800 E0394500 E0390000
Abstract Numbers:87M/3403
Record ID:1985069520
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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