Edi̇rne - Trakya Bölgesi̇ Paleojen-Neojen Çökelleri̇ni̇n (Edi̇rne-Keşan, Uzunköprü, Meri̇ç, Süloğlu Sondajlari) Mi̇kropaleontoloji̇k İncelenmesi̇

The Thrace Basin is located in the northwest of Türkiye, bounded by the Rhodope Zones to the west, the Strandja (Istranca, Strandzha) Massif to the North, and the İstanbul Zone to the east. The Stranja Massif’s basement is composed of the Tekedere Group, which includes Paleozoic gneisses and schists, as well as the Şeytandere Metagranite, consisting of altered and unaltered metagranites. Unaltered metagranites are characterized by large feldspar crystals and are typically white and pink in color, while altered metagranites are typically yellow color. The subject of this study Şeytandere metagranites which the uraninite mineral, for the first time, was identified in unaltered metagranite samples, while carnotite and tyuyamunite minerals were identified in altered meta-granite samples. The morphologies and elemental compositions of these minerals were identified by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). The SEM-EDS analyses revealed that the major elements of carnotite [K2(UO2)2(V2O8)(H2O)3] and tyuyamunite [Ca(UO2)2(V2O8)(H2O)8] are of K, U and V and Ca, U and V, respectively. In the investigated samples carnotite has a plate-like morphology, whereas tyuyamunite shows a fibrous apperance. This investigation shows that carnotite and tyuyamunite are epigentically formed from uranyl vanadate minerals in the Şeytandere metagranite. These minerals indicate uranium leaching from granitic materials and re-deposition as fine specks in open pores by circulating meteoric water. The leached uranyl ions, combined with vanadate ions, form carnotite and tyuyamunite under weathering conditions.

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Paleoenvironmental Features and Ostracod Investigation of Paleogene-Neogene Sequences in Babaeski̇- Lüleburgaz- Muratli-Çorlu Region (Southeastern Thrace, Turkey)

Şafak

2018

Bulletin of the Mineral Research and Exploration

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Aim of the study is to evaluate the Paleogene-Neogene sequences of Babaeski-Lüleburgaz-Muratlı-Çorlu (Southeastern Thrace, Turkey) region using the micropaleontological analysis on two borehole samples collected by Mineral Research and Exploration (MTA), measured sections and point samples taken from the neighborhood of Silivri, Türkmenli-Çorlu, Babaeski-Lüleburgaz, Edirne -Babaeski regions and Tekirdağ-Hayrabolu road. There the lignite sandstone, siltstone (Early Oligocene aged Danişmen Formation) and silts (Late Miocene-Pliocene aged Ergene Formation) with well-preserved ostracod fauna obtained from the the upper levels of the sequence along with some micro-Mollusca at some levels. The study results showed that lacustrine and lagoonal ostracods including marine species were generally found in the claystone, siltstone and marl of the lower and upper levels of lignite cuts in borehole. The ostracod assemblages identified in the study were compared with other ostracod studies in the Thrace Basin and other parts of Turkey as well as in the Oligocene in Paris, the Akiten Basin, Belgium. In the Early Oligocene sediments, the presence of the Tethys effect was observed in the investigated area. In addition, the ostracod species defined in the Late Miocene-Pliocene are compared with other ostracod studies carried out in the Thrace Basin and other parts of Turkey as well as in the Western and Eastern Carpathians, Caspian Basin and Baltic Sea. According to obtained fauna, the Paratethys effect was determined more than in Tethys in Late Miocene-Pliocene in the studied region.

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Edi̇rne - Trakya Bölgesi̇ Paleojen-Neojen Çökelleri̇ni̇n (Edi̇rne-Keşan, Uzunköprü, Meri̇ç, Süloğlu Sondajlari) Mi̇kropaleontoloji̇k İncelenmesi̇

Cited by 3 publications

References 6 publications

Micropaleontological (Ostracoda) content and mineralogical properties of the Neogene Ergene Formation (SW Thrace region): implications for the evolution of Thrace Basin

Micropaleontological (Ostracoda) content and mineralogical properties of the Neogene Ergene Formation (SW Thrace region): implications for the evolution of Thrace Basin

Newly identified uranyl vanadate mineral formation in the Thrace Basin, NW Türkiye: Insights into identification and origin of carnotite and tyuyamunite minerals

Paleoenvironmental Features and Ostracod Investigation of Paleogene-Neogene Sequences in Babaeski̇- Lüleburgaz- Muratli-Çorlu Region (Southeastern Thrace, Turkey)

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