New evidence and solution to the Maden complex controversy of the Southeast Anatolian orogenic belt (Turkey) |
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| Authors: | E Yiğitbaş Y Yilmaz |
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| Institution: | 1. ?stanbul Teknik üniversitesi, Maden Fakültesi, Jeoloji B?lümü, TR-80626, Maslak, ?stanbul, Turkey
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| Abstract: | The volcanosedimentary units of Late Mesozoic-Tertiary age that outcrop in the Southeast Anatolian orogenic belt are commonly
referred to as the Maden complex. There is a long-lasting controversy over its definition, age, stratigraphic and structural
position, and the origin, and thus, the orogenic evolution. To solve this problem, large strips across the Southeast Anatolian
orogenic belt have been studied extensively, and different rock groups which were regarded previously as the Maden unit have
been differentiated. Their major characteristics and differences have been identified. The Maden unit sensu stricto is here
redefined as a volcanosedimentary succession of Middle Eocene age representing a short-lived back-arc basin which reached
the stage of an embryonic ocean. Presently, the Maden group occurs mainly within the lower nappe stack of the nappe zone of
the Southeast Anatolian orogen. It rests stratigraphically on an amalgamated nappe package consisting of the different metamorphic
tectonic units and, in turn, is overlain tectonically by the upper nappe units. |
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| Keywords: | Southeast Anatolia Upper Cretaceous-Eocene volcanosedimentary units Ophiolite Arabian platform Orogenic evolution |
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