Ultrapotassic Mafic Rocks as Geochemical Proxies for Post-collisional Dynamics of Orogenic Lithospheric Mantle: the Case of Southwestern Anatolia, Turkey

Prelević, Dejan; Akal, Cüneyt; Foley, Stephen F.; Romer, Rolf L.; Stracke, Andreas; Bogaard, Paul van den

doi:10.1093/petrology/egs008

Cited by 246 publications

(142 citation statements)

References 173 publications

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“…1, 2, 3). It occurs between Köroglu caldera (Aydar et al 1996(Aydar et al , 2003) that collapsed at *15 Ma (Aydar et al 1998;Prelević et al 2012) in the north and Isparta-Gölcük volcanic area in the south where volcanism began with lamproites around 4 Ma and terminated with trachytic rocks at the Gölcük volcano, at around 10 ka (Lefèvre et al 1983;Floyd et al 1998;Prelević et al 2012).…”

Section: Geological Setting Of Afyon Provincementioning

confidence: 99%

“…These events resulted in the internal imbrication of the Menderes Massif block and the southward overthrusting of the Lycian nappes ( Fig. 1), eventually leading to late Miocene extensional tectonics and Menderes Massif uplift (Ş engör et al 1984;Yılmaz et al 2000;Işık et al 2004;Ring and Collins 2005;Ç emen et al 2006;Westaway 2006;Glodny and Hetzel 2007;Prelević et al 2012). During the postcollisional period, potassic and ultrapotassic magmas were produced along with calc-alkaline and crust-derived magmas in the western Anatolia (Bozkurt 2001(Bozkurt , 2003Bozkurt and Mittwede 2005;Ş engör and Yılmaz 1981;Ş engör et al 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Variable K-enrichment, different extent of Si-saturation and extremely variable isotopic and trace element compositions are clearly coupled with southward younging of the volcanism (Francalanci et al 2000;Dilek and Altunkaynak 2007;Helvacı et al 2009;Ersoy et al 2010a;Prelević et al 2012). The genesis and geodynamic implications of this magmatism are still a matter of debate, but large-scale mantle-source heterogeneity in its petrogenesis is widely accepted.…”

Section: Introductionmentioning

confidence: 99%

“…The genesis and geodynamic implications of this magmatism are still a matter of debate, but large-scale mantle-source heterogeneity in its petrogenesis is widely accepted. North to south variations in the geochemical characteristics are believed to be the response to rolling back of Aegean slab, movement of the slab window, a collapse of the overthickened Menderes Massif or as combination of these events (e.g., Ş engör et al 1985;Spakman et al 1988;Seyitoglu and Scott 1996;Wortel and Spakman 2000;Rimmelé et al 2003;Faccenna et al 2004;Glodny and Hetzel 2007;van Hinsbergen et al 2010;Biryol et al 2011;Prelević et al 2012). …”

Section: Introductionmentioning

confidence: 99%

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High-K volcanism in the Afyon region, western Turkey: from Si-oversaturated to Si-undersaturated volcanism

Akal

Helvacı

Prelević³

et al. 2012

Int J Earth Sci (Geol Rundsch)

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Volcanic rocks of the Afyon province (eastern part of western Anatolia) make up a multistage potassic and ultrapotassic alkaline series dated from 14 to 12 Ma. The early-stage Si-oversaturated volcanic rocks around the Afyon city and further southward are trachyandesitic volcanic activity (14.23 ± 0.09 Ma). Late-stage Si-undersaturated volcanism in the southernmost part of the Afyon volcanic province took place in three episodes inferred from their stratigraphic relationships and ages. Meliliteleucitites (11.50 ± 0.03 Ma), spotted trachyandesites, tephryphonolites and lamproites (11.91 ± 0.13 Ma) formed in the first episode; trachyandesites in the second episode and finally phonotephrites, phonolite, basaltic trachyandesites and nosean-bearing trachyandesites during the last episode. The parameter Q [normative q-(ne ? lc ? kls ? ol)] of western Anatolia volcanism clearly decreased southward with time becoming zero in the time interval 10-15 Ma.

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Section: Geological Setting Of Afyon Provincementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-K volcanism in the Afyon region, western Turkey: from Si-oversaturated to Si-undersaturated volcanism

Akal

Helvacı

Prelević³

et al. 2012

Int J Earth Sci (Geol Rundsch)

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“…Their genesis is suggested to be related to recycling of pelitic sediments and subsequent Kmetasomatism and enrichment of peridotitic lithosphere (e.g., Conticelli et al, 2012). Factors that control the silica activity of the high-K melts are suggested to be related to: 1 -abrupt change of the com-position of the recycled sediments (e.g., Conticelli and Peccerillo, 1992;Frezzotti et al, 2009)and/or2-interaction between deep asthenos-pheric mantle with lithospheric portion of mantle wedge through slab tears within the descending slab (e.g., Conticelli et al, 2012;Prelević et al, 2012). From petrographic and geochemical evidence, it is clear that some mixing between newly supplied silica under-saturated magma and batches of preexisting calc-alkaline magmas might have occurred during the evolution of the Saray volcano.…”

mentioning

confidence: 99%

Late Miocene K-rich volcanism in the Eslamieh Peninsula (Saray), NW Iran: Implications for geodynamic evolution of the Turkish–Iranian High Plateau

et al. 2014

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a b s t r a c tKeywords: High-K lavas Geochemistry, Sr-Nd-Pb isotopes, Post-collisional magmatism Iran Post-collisional volcanism in northwestern Iran is represented by the Saray high-K rocks including leucite-bearing under-saturated and leucite-free silica saturated rocks. We report Ar-Ar age data which constrain the age as ca. 11Ma (late Miocene). Most of clinopyroxene phenocrysts from the volcanic rocks have complex oscillatory zoning, with high Ti and Al cores, low Ti and high Al mantled clinopyroxenes, grading into low Ti and Al outer rims. All the rocks are highly enriched in incompatible trace elements and have identical Sr-Nd-Pb isotopes. Enrichment in incompatible elements and other geochemical features for the Saray lavas suggest a metasomatized sub-continental lithospheric mantle (SCLM) as the magma source. The negative Nb- Ta Pb isotopic values of the Saray lavas imply the involvement of slab terrigenous sediments and/or a continental lithosphere. Isotopically, the volcanic rocks define a binary trend, representing 5-8% mixing between the primary mantle and sediment melts. Our melting models suggest residual garnet in the source and are incompatible with partial melting of amphibole and/or phlogopite bearing lherzolites, although the complex geochemical features might indicate the result of mixing between melts produced by different sources or a homogenous melt passing through a compositionally-zoned mantle during multiple stages of partial melting and melt migration. The geochronological, geochemical and isotopic data for the Saray rocks suggest that these Late Miocene magmas were derived from a small degree of partial melting of subduction-metasomatized (subcontinental) lithospheric mantle source in a post-collisional setting.

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Lithospheric thickness controlled compositional variations in potassic basalts of Northeast China by melt‐rock interactions

Liu

Chen

Zeng

et al. 2016

Geophysical Research Letters

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Melt‐rock interaction is a common mantle process; however, it remains unclear how this process affects the composition of potassic basalt. Here we present a case study to highlight the link between compositional variations in the potassic basalts and melt‐rock interaction in cold lithosphere. Cenozoic potassic basalts in Northeast China are strongly enriched in incompatible elements and show EM1‐type Sr–Nd–Pb isotopes, suggesting an enriched mantle source. These rocks show good correlations between 87Sr/86Sr and K2O/Na2O and Rb/Nb. Notably, these ratios decrease with increasing lithospheric thickness, which may reflect melt‐lithosphere interaction. Phlogopite precipitated when potassic melts passed through the lithospheric mantle, and K and Rb contents of the residual melts decreased over time. The thicker the lithosphere, the greater the loss of K and Rb from the magma. Therefore, the compositions of potassic basalts were controlled by both their enriched sources and reactions with lithospheric mantle.

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Ultrapotassic Mafic Rocks as Geochemical Proxies for Post-collisional Dynamics of Orogenic Lithospheric Mantle: the Case of Southwestern Anatolia, Turkey

Cited by 246 publications

References 173 publications

High-K volcanism in the Afyon region, western Turkey: from Si-oversaturated to Si-undersaturated volcanism

High-K volcanism in the Afyon region, western Turkey: from Si-oversaturated to Si-undersaturated volcanism

Late Miocene K-rich volcanism in the Eslamieh Peninsula (Saray), NW Iran: Implications for geodynamic evolution of the Turkish–Iranian High Plateau

Lithospheric thickness controlled compositional variations in potassic basalts of Northeast China by melt‐rock interactions

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