Geochemistry of mafic lavas from Sivas, Turkey and the evolution of Anatolian lithosphere

Kurkcuoglu, B.; Pickard, Megan; Şen, Pınar; Hanan, B. B.; Sayıt, Kaan; Plummer, C. L.; Şen, Erdal; Yürür, Tekin; Furman, Tanya

doi:10.1016/j.lithos.2015.07.006

Cited by 19 publications

(26 citation statements)

References 76 publications

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“…1; Table DR1 in the GSA Data Repository 1 ). Dates obtained for volcanic rocks near the Inner Tauride suture and in the Arguvan region (10.9 Ma) are considerably older than the Pliocene ages inferred for them in previous geochemical investigations (Parlak et al, 2001;Ekici et al, 2007;Kürkçüoğlu et al, 2015). The youngest dates (ca.…”

Section: Protracted Mafic Volcanism In the Eastern Tauridesmentioning

confidence: 70%

Melt equilibration depths as sensors of lithospheric thickness during Eurasia-Arabia collision and the uplift of the Anatolian Plateau

Reid

Delph

Schleiffarth

et al. 2019

Geology

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A co-investigation of mantle melting conditions and seismic structure revealed an evolutionary record of mantle dynamics accompanying the transition from subduction to collision along the Africa-Eurasia margin and the >1 km uplift of the Anatolian Plateau. New 40Ar/39Ar dates of volcanic rocks from the Eastern Taurides (southeast Turkey) considerably expand the known spatial extent of Miocene-aged mafic volcanism following a magmatic lull over much of Anatolia that ended at ca. 20 Ma. Mantle equilibration depths for these chemically diverse basalts are interpreted to indicate that early to middle Miocene lithospheric thickness in the region varied from ∼50 km or less near the Bitlis suture zone to ∼80 km near the Inner Tauride suture zone. This southward-tapering lithospheric base could be a vestige of the former interface between the subducted (and now detached) portion of the Arabian plate and the overriding Eurasian plate, and/or a reflection of mantle weakening associated with greater mantle hydration trenchward prior to collision. Asthenospheric upwelling driven by slab tearing and foundering along this former interface, possibly accompanied by convective removal of the lithosphere, could have led to renewed volcanic activity after 20 Ma. Melt equilibration depths for late Miocene and Pliocene basalts together with seismic imaging of the present lithosphere indicate that relatively invariant lithospheric thicknesses of 60–70 km have persisted since the middle Miocene. Thus, no evidence is found for large-scale (tens of kilometers) Miocene delamination of the lower lithosphere from the overriding plate, which has been proposed elsewhere to account for late Miocene and younger uplift of Anatolia.

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Section: Protracted Mafic Volcanism In the Eastern Tauridesmentioning

confidence: 70%

Melt equilibration depths as sensors of lithospheric thickness during Eurasia-Arabia collision and the uplift of the Anatolian Plateau

Reid

Delph

Schleiffarth

et al. 2019

Geology

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“… Results from two studies are presented since the first [ Ku¨rkçu¨oğlu et al ., ] spans a much larger region than the second [ Parlak et al ., 2001].…”

Section: Melting Under Central Anatoliamentioning

confidence: 99%

“…[] and Ku¨rkçu¨oğlu et al . [], except for locations in Central Anatolia that are the subject of the present study. See Supporting Information S1 for description of methods for P‐T estimations.…”

Section: Melting Under Central Anatoliamentioning

confidence: 99%

Shallow melting of MORB‐like mantle under hot continental lithosphere, Central Anatolia

Reid

Schleiffarth

Cosca

et al. 2017

Geochem Geophys Geosyst

111

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Widespread mafic volcanism, elevated crustal temperatures, and plateau‐type topography in Central Anatolia, Turkey, could collectively be the result of lithospheric delamination, mantle upwelling, and tectonic escape. We use results from 40Ar/39Ar geochronology, basalt geochemistry, and a passive‐source broadband seismic experiment obtained in a collaborative international effort (Continental Dynamics‐Central Anatolia Tectonics) to investigate the upper mantle structure and evolution of melting conditions over an ∼2400 km2 area south and west of Hasan volcano. New 40Ar/39Ar dates for the basalts mostly cluster between 0.2 and 0.6 Ma, but some scoria cones are as old as 2.5 Ma. Basalts are dominantly Mg‐rich (Mg# = 62–71), moderately alkaline (normative Ne < 5 wt %), and, based on major and trace element signatures, derived from a peridotitic source. Covariations between radiogenic isotope and trace element signatures reveal contributions from a subduction‐related component and intraplate‐like mantle asthenosphere, as well as from ambient upper mantle. Central Anatolian basalts reflect maximum mantle potential temperatures of <1350°C and an average pressure of melt equilibration of 1.4 GPa, which are cooler and shallower than for basalts from Eastern and Western Anatolia. When considered in light of regionally slow upper mantle shear wave velocities, the mantle lithosphere may be thin and infiltrated by melts, or largely absent. An absence of secular changes in melting conditions suggests little to no lithospheric thinning over the past ∼1 Ma, despite evidence for lithospheric extension. Hasan basalts appear to be generated by decompression melting in response to the rollback of the Cyprean slab.

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“…22-3 Ma; Keller et al, 1977;Temel et al, 1998;Gençoğlu-Korkmaz et al, 2017), and eastern (Sivas volcanics, ca. 23-4 Ma; Platzman et al, 1998;Kürkçüoğlu et al, 2015;Kocaarslan and Ersoy, 2018) parts of the Kırşehir block (Fig. 1A).…”

Section: Geodynamic Implications Of Quaternary Volcanism In the Centrmentioning

confidence: 99%

“…10 Ma to Pliocene? ; Wilson et al, 1997;Varol et al, 2014) and Sivas (especially Pliocene; Kürkçüoğlu et al, 2015;Kocaarslan and Ersoy, 2018), Central Anatolian volcanic province basalts (including mildly alkaline ones) have strong arc-type trace-element Uslular and Gençaliog lu-Kuşcu | Mantle source heterogeneity in monogenetic basaltic systems GEOSPHERE | Volume 15 | Number 2 patterns in the multi-element diagram (Fig. 10), probably due to melting of heterogeneous mantle sources (enriched lithosphere with a contribution from asthenosphere e.g., Gençalioğlu-Kuşcu and Geneli, 2010;Reid et al, 2017).…”

Section: Geodynamic Implications Of Quaternary Volcanism In the Centrmentioning

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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Geochemistry of mafic lavas from Sivas, Turkey and the evolution of Anatolian lithosphere

Cited by 19 publications

References 76 publications

Melt equilibration depths as sensors of lithospheric thickness during Eurasia-Arabia collision and the uplift of the Anatolian Plateau

Melt equilibration depths as sensors of lithospheric thickness during Eurasia-Arabia collision and the uplift of the Anatolian Plateau

Shallow melting of MORB‐like mantle under hot continental lithosphere, Central Anatolia

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

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