Abstracts of The Paper Published only In The Turkish Edition of This Bulletin The Geology and Petrography of The Late Neoproterozoic-Early Paleozoic Units of Western Taurides (SW Of Sandıklı, Afyon)

Abstract

S OF THE PAPER PUBLISHED ONLY IN THE TURKISH EDITION OF THIS BULLETIN THE GEOLOGY AND PETROGRAPHY OF THE LATE NEOPROTEROZOIC EARLY PALEOZOIC UNITS OF WESTERN TAURIDES (SW OF SANDIKLI, AFYON) Semih GURSU* and M. Cemal GONCUOĞLU** Abstract.The investigated area including the region of the junction of the Middle and Western Taurides, comprise distinctive Middle Taurides stratigraphy and tectonic features. The units, cropped out in Sandikli, Karadirek, Basagac, Akharim, Tasoluk and surrounding areas are divided into three parts as Sandikli Basement Complex, Early Paleozoic Cover Units and Mesozoic Cover Units. Sandikli Basement Complex is composed of Guvercinoluk formation and Kestel Cayi Porphyroid Suite from bottom to top; Early Paleozoic cover units consist of Gogebakan, Hudai, Caltepe and Seydisehir formations respectively; Ilyasli and Derealani formations represent Mesozoic cover units. Mesozoic Cover Units is technically overlain by Sandikli Basement Complex in the western part of the Sandikli. Sandikli Basement Complex is formed an overturned antiformal structure within NNW SSW direction. Meta-sedimentary and meta-magmatic rocks of Sandikli Basement Complex are described as Guvercinoluk formation and Kestel Cayi Porfiroid Suite. Kestel Cayi Porphyroid Suite is composed of meta-rhyolite/meta-dacite and meta-quartz porphyry dikes. Meta-quartz porphyry dikes of Kestel Cayi Porphyroid Suite intrude the meta-sedimentary rocks of SBC (Guvercinoluk formation) and meta-rhyolite/meta-dacite rocks which formed rhyolitic composition carapace. Sandikli Basement Complex are cut by green-dark green colored continental tholeiitic basalt compositions dikes. Sandikli Basement Complex rocks are unconformably overlain by Early Cambrian Gogebakan formation. Upward, the formation is transitional to Celiloglu member of Hudai forma tion. The unit's age indicate Tommotian (Early Cambrian) age according to trace fossils at the transition between Celiloglu member of Hudai formation and Gogebakan formation. Celiloglu member is made up of alternation of green colored meta-mudstone/meta-siltstone and green-beige colored meta-sandstone and is transitional to Orenkaya quartzite member with slate bearing meta-sandstone (quartzite). Hudai formation is conformably overlain by Lower-Middle Cambrian Caltepe formation, which is made up of reddish-brown colored recrystalized dolomite and pink colored nodular limestones. The unit continues Middle Cambrian Early Ordovician Seydisehir formation including anchi-metamorphic milstone, nodular limestones, shales and sandstones, which have a narrow contact in the investigated area. Mesozoic cover units are represented by Early Liassic Ilyasli formation with Early Liassic-Early Malm Derealani formation. It is considered that the unconformity of Sandikli Basement Complex and Early Cambrian cover units correspond to Main Pan-African unconformity in Menderes Massif (Sengor et. al., 1984) and Menderes Massif, Eastern Taurides and similar units are pertaining to parts of PanAfrican basement.The investigated area including the region of the junction of the Middle and Western Taurides, comprise distinctive Middle Taurides stratigraphy and tectonic features. The units, cropped out in Sandikli, Karadirek, Basagac, Akharim, Tasoluk and surrounding areas are divided into three parts as Sandikli Basement Complex, Early Paleozoic Cover Units and Mesozoic Cover Units. Sandikli Basement Complex is composed of Guvercinoluk formation and Kestel Cayi Porphyroid Suite from bottom to top; Early Paleozoic cover units consist of Gogebakan, Hudai, Caltepe and Seydisehir formations respectively; Ilyasli and Derealani formations represent Mesozoic cover units. Mesozoic Cover Units is technically overlain by Sandikli Basement Complex in the western part of the Sandikli. Sandikli Basement Complex is formed an overturned antiformal structure within NNW SSW direction. Meta-sedimentary and meta-magmatic rocks of Sandikli Basement Complex are described as Guvercinoluk formation and Kestel Cayi Porfiroid Suite. Kestel Cayi Porphyroid Suite is composed of meta-rhyolite/meta-dacite and meta-quartz porphyry dikes. Meta-quartz porphyry dikes of Kestel Cayi Porphyroid Suite intrude the meta-sedimentary rocks of SBC (Guvercinoluk formation) and meta-rhyolite/meta-dacite rocks which formed rhyolitic composition carapace. Sandikli Basement Complex are cut by green-dark green colored continental tholeiitic basalt compositions dikes. Sandikli Basement Complex rocks are unconformably overlain by Early Cambrian Gogebakan formation. Upward, the formation is transitional to Celiloglu member of Hudai forma tion. The unit's age indicate Tommotian (Early Cambrian) age according to trace fossils at the transition between Celiloglu member of Hudai formation and Gogebakan formation. Celiloglu member is made up of alternation of green colored meta-mudstone/meta-siltstone and green-beige colored meta-sandstone and is transitional to Orenkaya quartzite member with slate bearing meta-sandstone (quartzite). Hudai formation is conformably overlain by Lower-Middle Cambrian Caltepe formation, which is made up of reddish-brown colored recrystalized dolomite and pink colored nodular limestones. The unit continues Middle Cambrian Early Ordovician Seydisehir formation including anchi-metamorphic milstone, nodular limestones, shales and sandstones, which have a narrow contact in the investigated area. Mesozoic cover units are represented by Early Liassic Ilyasli formation with Early Liassic-Early Malm Derealani formation. It is considered that the unconformity of Sandikli Basement Complex and Early Cambrian cover units correspond to Main Pan-African unconformity in Menderes Massif (Sengor et. al., 1984) and Menderes Massif, Eastern Taurides and similar units are pertaining to parts of PanAfrican basement.