Depositional evolution of the Soma coalfield, western Turkey: a preliminary report

• Autorzy: Inci U.
• Języki publikacji: EN

Abstrakty

EN

Miocene alluvial/fluvial-lacustrine deposits composed of three lignite successions (Lower, Middle, and Upper) are exposed in Soma coalfield located near the northern Aegean Sea coastline of the Western Anatolia. The total thickness of the coal successions is about 900 m, and they rest unconformably on the Mesozoic carbonate/siliciclastic basement rocks. Recognised lithofacies of coal successions have been arranged to fourteen facies assemblages and interpreted as environments.Lower Coal succession was deposited in an alluvial fan to plain and perennial forest mire system resulting in a subbituminous lignitic coal, in average 20 m thick. Freshwater carbonate-dominated Middle Coal succession, having lignite beds ranging from 0.5 to 2.5 m, was formed in floodplain environment, including shallow freshwater carbonate lakes and/or ponds, and frequently drying poor forest mires of an anastomosed river system. Volcanism-induced Upper Coal succession was deposited in fluvial channel, floodplain, and probably in allochthonous peat mires of a braided river system that rapidly got buried and/or eroded by volcaniclastic apron deposits, and culminated by large carbonate-dominated perennial shallow lakes.The Miocene coal successions were probably deposited in the fault-controlled karst-based palaeovalleys and lowlands of the intramountain palaeomorphology that were patterned by the Early Tertiary collision of the Eurasia and Anatolian plates. The coal successions was faulted by the extensionally tectonic regime and covered with Plio-Quaternary deposits.

Słowa kluczowe

EN

facies; stratigraphy; Soma coalfield; Turkey

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Polish Geological Institute Special Papers
• Rocznik: 2002
• Tom: Vol. 7
• Strony: 109--118
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Inci U.

• Dokuz Eylul University, Geology Department 35100 Bornova Izmir, Turkey,