Petrography and palynology of Late Oligocene and Middle Miocene coals in the Gelibolu peninsula, NW Turkey

Demirtaş, Ferdi; Bozcu, Mustafa; Koşun, Erdal; Akkiraz, Mehmet Serkan

doi:10.3906/yer-1411-9

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…The annual average temperature of palynomorphs was investigated to explain the transition during the Rupelian and Chattian, which revealed climatic cooling, vegetation and pollen changes of the pollen assemblages in coastal deposits. Demirtaş et al (2015) studied the late Oligocene palynomorphs from the Middle Miocene coals of the Gelibolu Peninsula. Samples were taken from coal zones in two different regions; coal petrography was used to examine the storage conditions of the two coal zones along with their organic petrography, compositions, maceral ratios and palynological characteristics.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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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“…It is widespread throughout the Oligocene of Turkey, but is richer in the Late Oligocene than Early Oligocene, and has only limited distribution in Miocene deposits (e.g. Akgün et al, 2013; Akgün & Sözbilir, 2001; Akkiraz & Akgün, 2005; Akyol, 1971; Batı, 1996; Demirtaş, Bozcu, Koşun, & Akkiraz, 2015; Ediger et al, 1990; Kayseri‐Özer et al, 2017; Nakoman, 1966; Sancay et al, 2006; Şengüler & Akkiraz, 2014). This view fits well with the data of Ediger et al (1990) who emphasized that this species culminates in the Upper Oligocene strata of the Thrace Basin, north‐west Turkey, while its quantities declined throughout the Early Miocene, and even survived in the Pliocene (Ediger et al, 1990).…”

Section: Biostratigraphymentioning

confidence: 99%

Early Miocene micropalaeontological record of the Aspiras Basin (Kastamonu), north‐west Anatolia, Turkey

2020

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This study presents the micropalaeontological data (palynomorphs and ostracods) including index taxa to assign a precise age, and the palaeoecological evolution of the Aspiras Basin, south‐east Kastamonu, northern Anatolia. The succession may informally be divided into a lower part including rich lignites interbedded with fine‐grained sediments and an upper part which comprises lignite‐free deposits such as mudrocks with dense gypsum and rare limestones. The sediments of the lower part were deposited in a wetland (i.e. peat‐forming environment) showing oscillations of the lake level, whereas the upper part indicates the shoaling or closing phase of the lake. Early Miocene age is assigned to the Aspiras Basin due to the presence of index taxa such as Leiotriletes maximus, Dicolpopollis kockelii, Intratriporopollenites instructus, Caryapollenites simplex, and ostracods Pseudocandona praecox and Potamocypris gracilis. Moreover, a new species of ostracod, Heterocypris aspirasensis, has been discovered. In the lowermost part of the succession, palynomorph spectra are dominated by spores such as Leiotriletes maxoides, L. maximus, and Verrutacosporites alienus while diverse pollen types, notably conifer pollen, attain high abundances further up in the succession. In the forested environment, the mixed mesophytic plants were less diverse. Low quantities of herbaceous taxa such as Ephedra sp., Poaceae, Amaranthaceae, Asteraceae‐Asteroideae, and Asteraceae‐Cichorioideae indicate the limited occurrence of open areas. During the Early Miocene, a warm and moist climate prevailed according to quantitative palaeoclimate data and the presence of the mega‐mesothermic taxa such as Taxodioideae, Mastixiaceae, Engelhardia, Sapotaceae, and Calamus.

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“…Even the Oligocene (late Rupelian) coal exposures of the Gök-çeada Basin, located on the western side of the Biga Peninsula, (Figure 1) may be correlated with the Thrace Basin since the palynomorph assemblages are more or less comparable. Both basins included high percentages of rotan palm Calamus (morpho-species Dicolpopollis kockelii) peaking during the Chattian (Late Oligocene) as indicated by Batı (1996), Ediger et al (1990), Akgün et al (2013) and Demirtaş et al (2015).…”

Section: Introductionmentioning

confidence: 95%

“…In particular the Thrace Basin is well known since it mostly includes the Oligocene lignite-bearing deposits (e.g. Akgün et al, 2013;Akyol, 1971;Batı, 1996;Bozcu et al, 2015;Demirtaş, Bozcu, Koşun, & Akkiraz, 2015;Ediger, Bati, & Alişan, 1990;Görür & Okay, 1996;İslamoğlu et al, 2010;Less, Özcan, & Okay, 2011;Özcan et al, 2010;Sakınç, Yaltırak, & Oktay, 1999;Siyako & Huvaz, 2007, Figure 1). Geological studies indicated that the spread of Oligocene coaly sequences was thought to be only in the Thrace Basin.…”

Section: Introductionmentioning

confidence: 97%

Late Oligocene–Early Miocene palaeoecology based on pollen data from the Kalkım-Gönen Basin (Northwest Turkey)

Durak

Akkiraz

2016

Geodinamica Acta

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Radiometric and palynological data of the Upper Oligocene-Lower Miocene Soma Formation from the Kalkım-Gönen Basin yield new results related to age and palynological contents. In this study, Upper Oligocene strata from the Daniş-ment and Linfa areas and Lower Miocene strata from the Bengiler area were sampled palynologically and for radiometric dating. The Danişment assemblage, which is older than the Linfa assemblages, mainly contains coniferous and evergreen to deciduous mixed mesophytic forest elements. Relatively high quantities of the altitudinal plants Picea and Abies, indicate a cooler palaeoclimate. The Linfa associations mainly include coniferous and riparian elements. Pollen of the riparian plant Alnus and Taxodiaceae indicative for the swamp forest community was predominant, probably as a result of a high lake level. There is a hiatus during the Oligocene-Miocene transition, probably showing a non-depositional phase and sea-level fall indicating the Mi-1 glaciation event. Higher in the sequence, the Aquitanian Bengiler sediments include high amounts of coniferous forest elements as well as components indicative for the evergreen and deciduous mesophytic forest and also riparian forest and swamp forest. Due to presence of thermophilous taxa Reveesia, Mastixiaceae and Arecaceae, a warm and humid palaeoclimate is inferred according to quantitative analyses using the Coexistence Approach.

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Petrography and palynology of Late Oligocene and Middle Miocene coals in the Gelibolu peninsula, NW Turkey

Cited by 6 publications

References 35 publications

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

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

Early Miocene micropalaeontological record of the Aspiras Basin (Kastamonu), north‐west Anatolia, Turkey

Late Oligocene–Early Miocene palaeoecology based on pollen data from the Kalkım-Gönen Basin (Northwest Turkey)

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