Evolution of Neogene calc-alkaline to alkaline volcanism in the Aliağa-Foça region (Western Anatolia, Turkey)

Akay, Erhan; Erdoğan, Burhan

doi:10.1016/j.jseaes.2004.01.015

Cited by 38 publications

(26 citation statements)

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“…Similar features have been reported from other NE-trending Miocene volcanoes and volcanic centres with surrounding flank eruptions in the Dikili, Aliaga, Foça and _ I Izmir regions in the central part of Western Anatolia (e.g. Akay and Erdogan 2004;Karack and Ylmaz 2001b). The conjugate fault pattern of the Bodrum peninsula can be attributed to an approximately N-S compressional tectonic regime, so the Bodrum magmatic complex can be linked to the post-collisional period in Western Anatolia rather than the later extensional period.…”

Section: Summary Of the Eruptive History Of The Tü Rkbü Kü Volcanicssupporting

confidence: 86%

Stratigraphy and volcanology of the Türkbükü volcanics: products of a stratovolcano in the Bodrum Peninsula, SW Anatolia

Karacık¹

2006

Geological Journal

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The Middle-Upper Miocene Bodrum magmatic complex of the Aegean region, southwestern Turkey, is mainly represented by intermediate stocks, lavas, pyroclastic and volcaniclastic deposits. Monzonitic stocks and connected porphyry intrusions and extrusions are the first products of the magmatism. These are followed by a volcanic succession consisting of andesitic-latitic lavas, autobrecciated lavas, pyroclastic and volcaniclastic deposits. The final stage is represented by basaltic and basaltic andesitic flows and dykes intruded into previous units.The volcanic succession crops out in the northern part of the Bodrum peninsula. In the lower part of this succession are widespread pyroclastic deposits, composed of pyroclastic fall and flow units, alternating with epiclastic deposits. Grain size, volume and thickness of the pyroclastic deposits were mainly controlled by the type, magnitude and intensity of the eruption. Further up the section, there are two horizons of debris avalanche deposits forming the coarsest and thickest deposits of the volcaniclastic succession. The debris avalanche deposits indicate at least two different flank collapses coeval with the volcanism. The stratigraphy and map pattern of these volcanic units imply that the northern part of the Bodrum peninsula was the north-facing flank of a stratovolcano during the mid-Late Miocene.

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Section: Summary Of the Eruptive History Of The Tü Rkbü Kü Volcanicssupporting

confidence: 86%

Stratigraphy and volcanology of the Türkbükü volcanics: products of a stratovolcano in the Bodrum Peninsula, SW Anatolia

Karacık¹

2006

Geological Journal

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“…which produced Foça tuffs, lateral connection has been proposed between early stage of rhyolitic Foça volcanism and Kocadağ volcanism. In Foça Peninsula a similar lithostratigraphic correlation has been shown between Foça tuffs and andesites of the Yunt Mountain volcanics (Akyürek and Soysal, 1983) by Akay and Erdoğan (2004). Geochronology and lithostratigraphy data indicates that during Late, Early Miocene while Kocadağ volcanism continued developing along with it, rhyolitic fiorite (freat) magmatism producing Foça tuff became active.…”

Section: Discussionsupporting

confidence: 60%

“…Lacustrine part of the Urla group is likely to be correlated with the Aliağa limestone; previous work carried out in the depression's Foça region ( Figure 1A) did not mention presence of alluvial sediments at the bottom of the Aliağa limestone, reflecting an unconformity. According to the stratigraphic observations Aliağa limestone lies concordantly and transitionally on the Foça tuff (Kaya, 1979(Kaya, , 1881Eşder et al, 1994;Akay and Erdoğan, 2004). All these data may indicate that while Foça Depression was extending W-SW direction and forming the Urla basin at the beginning of Middle Miocene, in the Foça region, in the remaining Late Early Miocene basin lacustrine sedimentation continued following the emplacement of the Foça tuff.…”

Section: Discussionmentioning

confidence: 95%

“…Demirtaş felsic pyroclastics defined by Ejima et al (1987) and Aliağa pyroclastics around Menemen-Aliağa area Eşder et al (1994) are also the equivalence of Foça tuffs. Akay (2000) and Akay ve Erdoğan (2001, 2004 studied rhyolitic pyroclastics in the Foça Peninsula within the scope of the Foça volcanics.…”

Section: Time-rockstratigraphy Connections Andmentioning

confidence: 99%

“…"Değirmentepe" limestone defined in the NE part of Karaburun Peninsula (Göktaş, 2014), 'Urla limestone' (Kaya, 1979;Göktaş, 2011) in Urla and 'Aliağa limestone' (Kaya, 1979(Kaya, , 1981Akay and Erdoğan, 2004) in Foça Peninsula and 'Çamdağ limestone' (Eşder et al, 1994) are the defined equivalents of Urla limestones in the Foça Depression.…”

Section: Time-rockstratigraphy Connections Andmentioning

confidence: 99%

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Neogene Stratigraphy of the İzmi̇r -Outer- Bay Islands

Göktaş¹

2016

Bulletin of the Mineral Research and Exploration

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The volcaniclastics, derived from calcalkaline acidic-intermediate volcanism in the region during late Early Miocene, and lacustrine deposits of Middle Miocene and alkaline volcanics are exposed on Uzun Island, Hekim Island, Çiçek Island and Karantina Island in the Outer Gulf of Izmir. Kocadağ volcaniclastics derived from Kocadağ volcanism, by extruding mainly calcalkaline andesitic-dacitic products during Late Early Miocene, represents the exposed oldest rock unit. The volcaniclastic succession extending in the north of Uzun Island is composed of pyroclastics in ignimbrite and blocky ash flow facieses, and epiclastics in volcanic mass flow (lahar) facies. Foça tuff, represented by rhyolitic ignimbrites, originated from an area around Foça and moving to an area around Uzun Island, emplaced onto the Kocadağ volcaniclastics in two main explosive stages. The Değirmentepe Member alluvial deposits composed of coarse volcanic detritus were deposited during a inactive period between the explosion stages. A K/Ar age of 16.0 Ma was obtained from a rhyolite dome, which shows lateral relationship with the correlant ignimbrites in Foça Peninsula, and so it is considered that Foça tuff emplaced onto the region at the end of late Early Miocene. Lacustrine-dominated Middle Miocene succession, which overlies the Foça tuff unconformably, differentiated as the Urla group. Urla group consists of alluvial Beşiktepe Formation, the Pirnalli Island volcaniclastics, which is composed of sublacustrine volcanic density-flow deposits and felsic ignimbrites, Hekim Island basalt comprising basic volcanics and lacustrine Urla limestone, respectively from bottom to top. Beşiktepe formation only exposed on Uzun Island, overlies the Foça tuff with an unconformity indicating a basin margin deposition during the Middle Miocene. Pirnalli Island volcaniclastic succession, which its lower boundary does not expose within the area on Hekim Island and Çiçek Islands, is mainly composed of epiclastics deposited by the dynamics of sublacustrine gravity flow and includes trachytic ignimbrite layers in various welding degrees. The main lithologic components of Pirnalli Island volcaniclastics derived from alkaline trachytic volcanism, which was active during the Middle Miocene in Menteş Peninsula. The eruption center of Hekim Island basalt intruding as a sill to the bottom of Urla limestone succession is on Hekim Island. Along the upper contact of the basalt intruding backshore deposits at the bottom of Urla limestone, the peperites occurred reflecting the interaction between molten lava and unconsolidated sediment. A K/Ar age of 14,8±0,8 Ma is obtained from the basic lavas called as trachybasalt and basaltic trachyandesite according to the major element composition. Hekim Island basalt, which exposed at the center of Foça Depression, can be correlated with both the Ilipinar basalt in Foça Peninsula and the Ovacik basalt in Urla basin with respect to chrono-and lithostratigraphy. Urla limestone succession, which transgressively overlies Hekim Island basalt, b...

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Volume Change Behavior of Natural Sands with the Addition of Mica Particles

Kahya

Eskişar

2023

Lecture Notes in Civil Engineering

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Evolution of Neogene calc-alkaline to alkaline volcanism in the Aliağa-Foça region (Western Anatolia, Turkey)

Cited by 38 publications

References 28 publications

Stratigraphy and volcanology of the Türkbükü volcanics: products of a stratovolcano in the Bodrum Peninsula, SW Anatolia

Stratigraphy and volcanology of the Türkbükü volcanics: products of a stratovolcano in the Bodrum Peninsula, SW Anatolia

Neogene Stratigraphy of the İzmi̇r -Outer- Bay Islands

Volume Change Behavior of Natural Sands with the Addition of Mica Particles

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