Geochemical approach to magmatic evolution of Mt. Erciyes stratovolcano Central Anatolia, Turkey

Kurkcuoglu, B.; Şen, Erdal; Aydar, Erkan; Gourgaud, Alain; Gündoğdu, Niyazi

doi:10.1016/s0377-0273(98)00067-5

Cited by 59 publications

(45 citation statements)

References 41 publications

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“…The CAVP volcanism is influenced by the intracontinental convergence associated with collision of the African plate with the Eurasian plate, and produced many polygenetic volcanoes, such as Hasandag, Erciyes, Melendiz, Keciboyduran, monogenetic volcanoes (domes, such as Golludag, maars, such as Acigol, Cora, and several hundreds of scoria cones) and extensive ignimbrite sheets. These are genetically related to basaltic to rhyolitic magmatism with a distinctive subduction component inherited from an earlier subduction (Kurkcuoglu et al 1998;Deniel et al 1998;Aydar and Gourgaud 2002).…”

Section: Geodynamic Settingmentioning

confidence: 99%

Review of post-collisional volcanism in the Central Anatolian Volcanic Province (Turkey), with special reference to the Tepekoy Volcanic Complex

Kuşcu

Geneli

2008

Int J Earth Sci (Geol Rundsch)

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Neogene-Quaternary post-collisional volcanism in Central Anatolian Volcanic Province (CAVP) is mainly characterized by calc-alkaline andesites-dacites, with subordinate tholeiitic-transitional-mildly alkaline basaltic volcanism of the monogenetic cones. Tepekoy Volcanic Complex (TVC) in Nigde area consists of base surge deposits, and medium to high-K andesitic-dacitic lava flows and basaltic andesitic flows associated with monogenetic cones. Tepekoy lava flows petrographically exhibit disequilibrium textures indicative of magma mixing/mingling and a geochemisty characterized by high LILE and low HFSE abundances, negative Nb-Ta, Ba, P and Ti anomalies in mantle-normalized patterns. In this respect, they are similar to the other calc-alkaline volcanics of the CAVP. However, TVC lava flows have higher and variable Ba/Ta, Ba/Nb, Nb/Zr, Ba/TiO 2 ratios, indicating a heterogeneous, variably fluid-rich source. All the geochemical features of the TVC are comparable to orogenic andesites elsewhere and point to a sub-continental lithospheric mantle source enriched in incompatible elements due to previous subduction processes. Basaltic monogenetic volcanoes of CAVP display similar patterns, and HFS anomalies on mantle-normalized diagrams, and have incompatible element ratios intermediate between orogenic andesites and within-plate basalts (e.g. OIB). Accordingly, the calcalkaline and transitional-mildly alkaline basaltic magmas may have a common source region. Variable degrees of partial melting of a heterogeneous source, enriched in incompatible elements due to previous subduction processes followed by fractionation, crustal contamination, and magma mixing in shallow magma chambers produced the calc-alkaline volcanism in the CAVP. Magma generation in the TVC, and CAVP in general is via decompression melting facilitated by a transtensional tectonic regime. Acceleration of the extensional regime, and transcurrent fault systems extending deep into the lithosphere favoured asthenospheric upwelling at the base of the lithosphere, and as a consequence, an increase in temperature. This created fluid-present melting of a fluid-enriched upper lithospheric mantle or lower crustal source, but also mixing with asthenosphere-derived melts. These magmas with hybrid source characteristics produced the tholeiitic-transitionalmildly alkaline basalts depending on the residence times within the crust. Hybrid magmas transported to the surface rapidly, favored by extensional post-collision regime, and produced mildly alkaline monogenetic volcanoes. Hybrid magmas interacted with the calc-alkaline magma chambers during the ascent to the surface suffered slight fractionation and crustal contamination due to relatively longer residence time compared to rapidly rising magmas. In this way they produced the mildly alkaline, transitional, and tholeiitic basaltic magmas. This model can explain the coexistence of a complete spectrum of q-normative, ol-hy-normative, and ne-normative monogenetic basalts with both subduction and within-plate signatures in ...

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Section: Geodynamic Settingmentioning

confidence: 99%

Review of post-collisional volcanism in the Central Anatolian Volcanic Province (Turkey), with special reference to the Tepekoy Volcanic Complex

Kuşcu

Geneli

2008

Int J Earth Sci (Geol Rundsch)

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“…A number of studies (INNOCENTI et al, 1975;PASQUARE et al, 1988;BIGAZZI et al, 1993;LE PENNEC et al, 1994;NOTSU et al, 1995: AYDAR andGOUR-GAUD, 1998;FROGER et al, 1998;KURKCUOGLU et al, 1998;TOPRAK, 1998;SEN et al, 2003SEN et al, , 2004 have been carried out in the Central Anatolian Volcanic Province (CAVP). The CAVP is a complex system of volcano-tectonic depressions created during the MidLate Miocene times.…”

Section: Geological Settingsmentioning

confidence: 99%

“…The Mt. Koc stage is represented by andesite, basaltic andesite and alkaline basalt lava flows and the Erciyes stage is composed of andesitic, basaltic-andesitic, dacitic, rhyodacitic lavas and pyroclactics (KURKCUOGLU et al, 1998). According to the NOTSU et al (1995), collision tectonics regime operated in the central Anatolia and Erciyes stratovolcano was the combined process of fractional crystallization of basaltic magma and crustal assimilation without injection of slab-derived components.…”

Section: Geological Settingsmentioning

confidence: 99%

Curie-point Depth from Spectral Analysis of Magnetic Data in Erciyes Stratovolcano (Central TURKEY)

Maden

2009

Pure Appl. Geophys.

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Curie-point depth and heat flow values of the Erciyes region are determined to identify the thermal regime of the Central Anatolia by applying the spectral analysis method to the magnetic anomaly data. To compute the spectrum of the data, the magnetic anomaly of the region is transformed into 2-D Fourier domain to attain the average Curie depth. This method is useful in determining the top boundary of magnetic anomaly sources and reveals the Curie depth as 13.7 km in the study area. The obtained results imply a high thermal gradient (42.3°C km -1 ) and corresponding heat flow values (88.8 mWm -2 ) in the research area. Using the temperature value measured at borehole drilled by the General Directorate of Mineral Research and Exploration of Turkey (MTA), the values for the thermal gradient and heat flow value were computed as 50.7°C km -1 , 106.5 mWm -2 . From the heat flow value, the Curie-point depth was determined as 11.4 km in this region. It is concluded from the obtained values that the region has very high geothermal potential caused by partial melting of the lower crust.

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“…5 and 6; Innocenti et al 1975;Aydar et al 1995;Alici et al 1998;Temel et al 1998a;1998b). In Cappadocia extensive dacitic to rhyolitic ignimbrite sheets were deposited from the Late Miocene to Quaternary, associated with large andesitic stratovolcanoes and alkali basaltic scoria cones and maars (Pasquare et al 1988;Le Pennec et al 1994;Kürkçüoglu et al 1998;Temel et al 1998b).…”

Section: Eastern Mediterranean (Greece and Turkey)mentioning

confidence: 99%

Tertiary-Quaternary subduction processes and related magmatism in the Alpine-Mediterranean region

Harangi

Downes

Seghedi³

2006

Memoirs

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Geochemical approach to magmatic evolution of Mt. Erciyes stratovolcano Central Anatolia, Turkey

Cited by 59 publications

References 41 publications

Review of post-collisional volcanism in the Central Anatolian Volcanic Province (Turkey), with special reference to the Tepekoy Volcanic Complex

Review of post-collisional volcanism in the Central Anatolian Volcanic Province (Turkey), with special reference to the Tepekoy Volcanic Complex

Curie-point Depth from Spectral Analysis of Magnetic Data in Erciyes Stratovolcano (Central TURKEY)

Tertiary-Quaternary subduction processes and related magmatism in the Alpine-Mediterranean region

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