Sr-Nd-Pb isotopic significance of mantle source components from Central and Western Anatolia: &#160;Melting &#160;evidences&#160; &#160;from peridotite and pyroxenite source &#160;domains
Authors: Kurkcuoglu Biltan , Yürür Tekin 
Published: March 2021

&lt;p&gt;Extensive magmatic activities were developed in &amp;#160;Central and Western Anatolia,&amp;#160; since middle miocene to quaternary times,&amp;#160;&amp;#160; the most primitive lavas are situated in eastern end of Central (Sivas) and also western (Kula) Anatolia, besides Kula basalts are&amp;#160; one of the most recent basaltic rocks together with&amp;#160; basalts&amp;#160; from south-central Anatolia.&amp;#160; &amp;#160;Although the magmatism is generally&amp;#160;&amp;#160; observed at several different&amp;#160; locations, the recent&amp;#160;&amp;#160; basaltic rocks in both of the regions &amp;#160;&amp;#160;seem to be derived from&amp;#160; the melting&amp;#160; of the peridotite and pyroxenite &amp;#160;source &amp;#160;domains and the latter one&amp;#160; was ignored in previous studies as source component.&lt;/p&gt;&lt;p&gt;&amp;#160;The previous studies indicate that many of the basaltic rocks from Central and Western Anatolia&amp;#160; are related with spinel-garnet transition, but typical Tb/Yb(N) (&gt;1.8; [1]) and Zn/Fe&amp;#160; &amp;#160;(separates peridotite-derived (Zn/Fe &lt;12; [2]) and pyroxenite-derived (Zn/Fe 13-20); [2] melts)&amp;#160; Co/Fe&amp;#160; ratios of the basaltic rocks from&amp;#160; several volcanic centers from Central and Western Anatolia&amp;#160; reveal that&amp;#160;&amp;#160; melting from the single&amp;#160; source component&amp;#160; are not solely capable of&amp;#160; the producing&amp;#160; basaltic &amp;#160;rocks.&amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;Sr-Nd and Pb isotopic &amp;#160;compositions &amp;#160;clearly display the distinction &amp;#160;of samples which are&amp;#160; linked to&amp;#160; &amp;#160;&amp;#160;asthenospheric source. The lead isotopic systematic &amp;#160;shows&amp;#160; no siginificant differences&amp;#160; among the Central and Western Anatolian basalts,&amp;#160; of all the samples are above the NHRL line and close to EM II&amp;#160; mantle component, &amp;#160;Sr- Nd&amp;#160; isotopes&amp;#160; also display similar compositions as well, the majority of the samples are in and close to mantle array,&amp;#160;&amp;#160; but the &amp;#160;Sr isotopic composition &amp;#160;&amp;#160;of&amp;#160; Miocene aged &amp;#160;Gediz and Simav lavas have high radiogenic values.&amp;#160;&lt;/p&gt;&lt;p&gt;Tb/Yb(N),&amp;#160; Zn/Fe ratios&amp;#160; and &amp;#160;&amp;#160;as well as the Pb isotopic&amp;#160; compositions and REE-based melting model reveal &amp;#160;that Sivas, Erciyes Hasanda&amp;#287;, and Develida&amp;#287; samples in central Anatolia,&amp;#160; and Kula, Gediz basalt in western Anatolia&amp;#160; seem to be&amp;#160; derived from the amalgamated melting of&amp;#160; pyroxenite and peridotite sources, &amp;#160;&amp;#160;besides, &amp;#160;the sources melting is capable of &amp;#160;the producing&amp;#160; &amp;#160; &amp;#160;elemental variations in &amp;#160;basaltic rocks related with either lithospheric delamination or lithospheric&amp;#160; unstability&lt;/p&gt;&lt;ul&gt;&lt;li&gt;1.Wang et al., 2002, J.Geophys.Res.vol:107,ECV 5 1-21&lt;/li&gt;
&lt;li&gt;2 .Le Roux, et al.,2011,EPSL, vol:307, 395-408&lt;/li&gt;
&lt;/ul&gt;&lt;p&gt;This study is financially supported by Hacettepe University, BAB project no: FHD-2018-17283&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;