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Journals / Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi / 2026 / Cilt: 18

Petrographic and geochemical signatures of calc-alkaline volcanic rocks of Yuntdağı Region (Muradiye, Manisa)

Yuntdağı Bölgesi (Manisa, Muradiye) kalk-alkalen volkanik kayaçların petrografik ve jeokimyasal özellikleri

Murat Çiflikli(NİĞDE ÖMER HALİSDEMİR ÜNİVERSİTESİ)0000-0003-4848-7965
Pages
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Publication Date
2026-07-28
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The geochemical characteristics suggest that the magmas were derived from partial melting of a subduction-modified lithospheric mantle source and evolved mainly through fractional crystallization processes.

📌 3 Key Takeaways

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Objective & Hypothesis:The volcanic rocks in the Yuntdağı Region (Manisa–Muradiye) represents the calc-alkaline products of the Early–Middle Miocene magmatism in Western Anatolia.
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Key Findings & Data:Geochemical results reveal a high-K calc-alkaline affinity; systematic decreases in Fe₂O₃, MgO, CaO, MnO, and TiO₂ with increasing SiO₂ highlight the significant role of fractional crystallization during magmatic evolution.
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Conclusion & Impact:The geochemical characteristics suggest that the magmas were derived from partial melting of a subduction-modified lithospheric mantle source and evolved mainly through fractional crystallization processes.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Yuntdağı Bölgesi · Erken– Orta Miyosen · Fraksiyonel kristallenme

Abstract

The volcanic rocks in the Yuntdağı Region (Manisa–Muradiye) represents the calc-alkaline products of the Early–Middle Miocene magmatism in Western Anatolia. This study systematically investigates the mineralogical, petrographic, and geochemical characteristics of the regional volcanics in order to elucidate their magma source and evolutionary mechanisms. Petrographic data indicate that the rocks are predominantly andesitic to dacitic in composition and display porphyritic to hypocrystalline textures, with plagioclases, clinopyroxene, orthopyroxene, amphibole, and biotite as the dominant mineral phases. Geochemical results reveal a high-K calc-alkaline affinity; systematic decreases in Fe₂O₃, MgO, CaO, MnO, and TiO₂ with increasing SiO₂ highlight the significant role of fractional crystallization during magmatic evolution. Trace element patterns show pronounced enrichment in Large Ion Lithophile Elements (LILE) and marked Nb–Ta–Ti–P negative anomalies, indicating a lithospheric mantle source metasomatized by subduction-related processes. Rare Earth Element (REE) distributions are characterized by enrichment of Light Rare Earth Elements (LREE) relative to Heavy Rare Earth Elements (HREE) and display coherent patterns across the volcanic units. The geochemical characteristics suggest that the magmas were derived from partial melting of a subduction-modified lithospheric mantle source and evolved mainly through fractional crystallization processes.

Özet

Yuntdağı Bölgesi (Manisa–Muradiye)’ndeki volkanik kayaçlar Batı Anadolu’nun Erken–Orta Miyosen magmatizmasının kalk-alkalen karakterli ürünlerini temsil etmektedir. Bu çalışma, bölgedeki volkanitlerin mineralojik, petrografik ve jeokimyasal özelliklerini sistematik biçimde inceleyerek magma kaynağı ve evrim mekanizmalarını ortaya koymayı amaçlamaktadır. Petrografik verilere göre kayaçlar andezit–dasit bileşiminde; porfirik ve hipokristalin dokular sunmakta olup, plajiyoklaz, klinopiroksen, ortopiroksen, amfibol ve biyotit baskın mineral fazlarını oluşturmaktadır. Jeokimyasal veriler, yüksek potasyumlu kalk-alkalen karaktere işaret etmekte; SiO₂ artışıyla Fe₂O₃, MgO, CaO, MnO ve TiO₂ içeriklerindeki sistematik azalma fraksiyonel kristallenmenin etkinliğini ortaya koymaktadır. İz element diyagramlarında belirgin büyük iyon litofil element (LILE) zenginleşmesi ile Nb–Ta–Ti–P negatif anomalileri, dalma-batma süreçleriyle metasomatize olmuş litosferik manto kaynağını işaret etmektedir. Nadir toprak element dağılımları, hafif nadir toprak elementlerin (LREE) ağır nadir toprak elementlere (HREE) göre zenginleştiğini ve benzer desenler sunduğunu göstermektedir. Jeokimyasal özellikler, magmaların yitim süreciyle değişime uğramış litosferik manto kaynağının kısmi ergimesinden türediğini ve başlıca fraksiyonel kristalleşme süreçleriyle evrildiğini ortaya koymaktadır.

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Cite This Article

Çiflikli, M. (2026). Petrographic and geochemical signatures of calc-alkaline volcanic rocks of Yuntdağı Region (Muradiye, Manisa). Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 18. https://doi.org/10.28948/ngumuh.1895843

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