Magmatic evolution of the Early Pliocene Etrüsk stratovolcano, Eastern Anatolian Collision Zone, Turkey

Oyan, Vural; Keskin, Mehmet; Lebedev, V. A.; Чугаев, А. В.; Шарков, Е. В.

doi:10.1016/j.lithos.2016.03.017

Cited by 58 publications

(47 citation statements)

References 51 publications

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“…5A). In contrast to Pliocene-Quaternary Anatolian basalts from the Eastern Anatolian volcanic province (Pearce et al, 1990;Notsu et al, 1995;Alıcı-Şen et al, 2004;Lustrino et al, 2010Lustrino et al, , 2012Özdemir et al, 2011;Ekici et al, 2014;Lebedev et al, 2016;Oyan et al, 2016), which also have both alkaline and subalkaline affinity (Ol-Nph and Ol-Hyp normative), Kula basalts are entirely Ol-Nph normative with strong alkaline affinity ( Fig. 5A; Ercan, 1993;Notsu et al, 1995;Aldanmaz, 2002;Alıcı et al, 2002;Innocenti et al, 2005;Tokçaer et al, 2005;Chakrabarti et al, 2012;Grützner et al, 2013).…”

Section: Procedures In the Laboratories At University Of Minnesota (Usa)mentioning

confidence: 99%

Mantle source heterogeneity in monogenetic basaltic systems: A case study of Eğrikuyu monogenetic field (Central Anatolia, Turkey)

Uslular

Gençalioğlu-Kuşcu

2019

Geosphere

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The Eğrikuyu monogenetic field is located in the southwestern part of the Central Anatolian volcanic province and includes numerous scoria cones and related lava flows, as well as a few maars. Eğrikuyu monogenetic field basalts are mainly olivine-nepheline (Ol-Nph) normative, with higher MgO (7.9-11.5 wt%) and Ni (up to 226 ppm) contents compared to other Central Anatolian vol canic province basalts. Enrichment in large ion lithophile elements compared to high field strength elements and depletions in Nb, Ta, P, and Ti in the multi-element diagrams are typical trace-element characteristics of all Central Anatolian volcanic province basalts. Mineral, trace element, and isotope compositions of Eğrikuyu monogenetic field basalts revealed the necessity of at least two distinct and variously enriched components responsible for their formation. Decompressional melting of metasomatized subcontinental lithospheric mantle (enriched mid-ocean-ridge basalt-like), with or without the contribution of upwelling deep asthenospheric melt (oceanic-island basalt-like), may explain the geochemical characteristics of all Central Anatolian volcanic province basalts. The lower 207 Pb/ 204 Pb ratios and some distinct clinopyroxene compositions (titaniferous augite and Fe-rich diopside) in Eğrikuyu monogenetic field basalts are indicators for the presence of upwelling asthenosphere, which is also evident in the low-seismic-velocity anomalies and Cyprian slab tear that underlie the field. The Eğrikuyu monogenetic field is a good example of mantle source heterogeneity in a monogenetic basaltic field and therefore constitutes a suitable region within the Central Anatolian volcanic province where different mantle source components can be traced. GEOSPHERE GEOSPHERE, v. 15, no. 2

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Section: Procedures In the Laboratories At University Of Minnesota (Usa)mentioning

confidence: 99%

Mantle source heterogeneity in monogenetic basaltic systems: A case study of Eğrikuyu monogenetic field (Central Anatolia, Turkey)

Uslular

Gençalioğlu-Kuşcu

2019

Geosphere

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“…The surface geology across the East Anatolian Plateau is dominated by widespread Neogene-Quaternary magmatism approximately (40,000 km 2 ), varying in composition from basaltic to granitic (Innocenti et al, 1976(Innocenti et al, , 1980(Innocenti et al, , 1982Pearce et al, 1990;Yılmaz, 1990;Ercan et al, 1990;Notsu et al, 1995;Bigazzi et al, 1997;Keskin et al, 1998;Keskin, 2003Keskin, , 2007Şen et al, 2004;Özdemir et al, 2006;Hubert-Ferrari et al, 2009;Kheirkhah et al, 2009;Çolakoğlu & Arehart, 2010;Lebedev et al, 2010;Lebedev, Volkov, et al, 2013;Lebedev, Chugaev, et al, 2016, Lebedev et al, 2018Özdemir, 2011;Sumita & Schmincke, 2013;Özdemir & Güleç, 2014;Selçuk et al, 2016;Oyan et al, 2016Oyan et al, , 2017Oyan, 2018;Di Giuseppe et al, 2017;Açlan & Altun, 2018;Rabayrol et al, 2019) (Figures 1a and 2a). These petrological studies infer the lava chemistry, the origin, and the depth of melting in Eastern Anatolia.…”

Section: Introductionmentioning

confidence: 99%

Long Wavelength Progressive Plateau Uplift in Eastern Anatolia Since 20 Ma: Implications for the Role of Slab Peel‐Back and Break‐Off

Memiş

Gogus

Uluocak

et al. 2020

Geochem Geophys Geosyst

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Stratigraphic evidence is used to interpret that the East Anatolian Plateau with 2 km average elevation today was below sea level ~20 Ma and uplift began in the northern part. The presence of voluminous volcanic rocks/melt production across the plateau—younging to the south—corroborates geophysical interpretations (e.g., high heat flow and lower seismic velocities) that suggest progressive removal of the slab subducting under the Pontides. Here, we conduct numerical experiments that investigate the change in the surface uplift as a response to slab peel‐back and potential break‐off processes under subduction‐accretionary complexes as well as continental lithosphere. Model results show similar types of tectonic behavior and magnitudes of uplift‐subsidence in both oceanic and continental removal processes, and they satisfactorily explain 1.5 km of plateau rise and a ~280 km wide asthenospheric upwelling zone beneath Eastern Anatolia over 18 Myr timescale. Parametric investigation for varying plate strength and convergence velocities show that such model parameters control the amount of surface uplift (1 to 3 km), the width of the asthenospheric upwelling zone, and the potential timing/depth of break‐off of the steepening/peeling slab. Experiments show that slab break‐off develops during the terminal phase, which may correspond to only a few million years ago. Therefore, the long wavelength plateau uplift and magmatism over the Eastern Anatolian‐Lesser Caucasus region since 20 Ma is controlled by progressive slab peel‐back and resulting mantle dynamics. The slab break‐off process (if it happened) has yet an indiscernible role.

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“…Heterogeneous mantle source with various degrees of melting is thought to be responsible for the widespread volcanism around the Karacadağ, and especially they are isotopically (e.g., enriched 87 Sr/ 86 Sr composition) contemporaneous with the other SEAVP volcanics (Ekici et al, 2012;Lustrino et al, 2010). Therefore, we divided this region as a separate group from the EAVP where there is a N-S trending postcollisional volcanism (along the BSZ; Figure 1) initiated at middle Miocene (~13 Ma) and continued to the historical times (e.g., Alıcı-Şen et al, 2004;Innocenti et al, 1976;Keskin, 2003Keskin, , 2007Keskin et al, 1998;Notsu et al, 1995;Oyan et al, 2016Oyan et al, , 2017Özdemir & Güleç, 2014;Pearce et al, 1990). There is a clear younging trend in the EAVP volcanism from the north (e.g., Kars-Erzurum plateau,~11 Ma; Keskin et al, 1998) to the south (Etrüsk volcano, 4.7-3.6 Ma; Oyan et al, 2016;Süphan volcano, 0.76-0.06 Ma;Özdemir & Güleç, 2014).…”

Section: 1029/2018gc007533mentioning

confidence: 99%

Geochemical Characteristics of Anatolian Basalts: Comment on “Neogene Uplift and Magmatism of Anatolia: Insights From Drainage Analysis and Basaltic Geochemistry” by McNab Et Al.

Uslular

Gençalioğlu-Kuşcu

2019

Geochem Geophys Geosyst

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Data compilation for Neogene basalts in Anatolia by McNab et al. (, https://doi.or/10.1002/2017GC007251 G‐cubed) is selective and inconsistent, and it would not serve their purpose of showing how Neogene uplift and magmatism of Anatolia are related to processes within the asthenospheric mantle. The authors included not only a fraction of an extensive data set for Neogene basalts but also more evolved compositions other than basalts. Moreover, a compilation of basalt geochemistry data throughout the Anatolia based only on longitudinal division without considering different tectonic units and geodynamic processes is an unrealistic attempt. All these shortcomings result in erroneous interpretations especially for the understanding of the link between Neogene‐Quaternary volcanism and uplift in the Anatolia.

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Magmatic evolution of the Early Pliocene Etrüsk stratovolcano, Eastern Anatolian Collision Zone, Turkey

Cited by 58 publications

References 51 publications

Mantle source heterogeneity in monogenetic basaltic systems: A case study of Eğrikuyu monogenetic field (Central Anatolia, Turkey)

Mantle source heterogeneity in monogenetic basaltic systems: A case study of Eğrikuyu monogenetic field (Central Anatolia, Turkey)

Long Wavelength Progressive Plateau Uplift in Eastern Anatolia Since 20 Ma: Implications for the Role of Slab Peel‐Back and Break‐Off

Geochemical Characteristics of Anatolian Basalts: Comment on “Neogene Uplift and Magmatism of Anatolia: Insights From Drainage Analysis and Basaltic Geochemistry” by McNab Et Al.

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