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Journals / Maden Tetkik ve Arama Dergisi / 2025 / Cilt: 178 Sayı: 178

Pegmatites and alkali feldspar granites as sources of industrial K-feldspar: A study from Borucu, Aksaray, Central Türkiye

Gökhan Demirela(Aksaray University, Faculty of Engineering, Department of Geological Engineering, Aksaray, Türkiye)0000-0001-8260-8914
Mustafa Haydar Terzi(Aksaray University, Faculty of Engineering, Department of Geological Engineering, Aksaray, Türkiye)0000-0003-4224-6482
Ahmet Fatih Oskay(Oskay Engineering, Aksaray, Türkiye,)0009-0001-3472-0829
Pages
73–94
Publication Date
2025-12-23
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AI Summary & Key Takeaways

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

Despite Fe2O3 limitations, Borucu’s pegmatites and AFG represent usable industrial raw material resources.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The Borucu (Aksaray) region, within the Central Anatolian Crystalline Complex, comprises a variety of rocks, including granite, alkali feldspar granite (AFG), pegmatite, and aplite dikes.
📊
Key Findings & Data:The granite and AFG host some veins or lenses of pegmatites, with lengths reaching approximately 70 m in the N10-25W direction.
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Conclusion & Impact:Despite Fe2O3 limitations, Borucu’s pegmatites and AFG represent usable industrial raw material resources.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Alkali Feldspar Granite · Pegmatite · K-Feldspar

Abstract

The Borucu (Aksaray) region, within the Central Anatolian Crystalline Complex, comprises a variety of rocks, including granite, alkali feldspar granite (AFG), pegmatite, and aplite dikes. The granite and AFG host some veins or lenses of pegmatites, with lengths reaching approximately 70 m in the N10-25W direction. The AFG and pegmatitic rocks are characterized by variable mineral assemblages, including K-feldspar (orthoclase), quartz, plagioclase, and to a lesser extent, biotite, garnet, and opaque minerals. Inner zones feature the mega-grained pegmatite, whereas outer zones consist of the coarse-grained K-feldspar and quartz pegmatite. In this study, integrated surface and vertical (trenching and drilling) exploration, mineralogy-petrography, geochemical, and magnetic separation analyses were employed to assess the industrial raw material potential of the AFG and pegmatites. The total alkali (Na2O+K2O) contents reach 15.56-16.82% for the mega-grained pegmatite, 8.07-9.76% in the coarse-grained pegmatite, and 9.20-9.66% in the AFG. However, the Fe2O3 contents (0.30-1.15%) constrain their industrial raw material quality. Magnetic separation improved the AFG material to second-quality ceramic industry standards. Despite Fe2O3 limitations, Borucu’s pegmatites and AFG represent usable industrial raw material resources.

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Cite This Article

Demirela, G., Terzi, M. H., Oskay, A. F. (2025). Pegmatites and alkali feldspar granites as sources of industrial K-feldspar: A study from Borucu, Aksaray, Central Türkiye. Maden Tetkik ve Arama Dergisi, Cilt: 178 Sayı: 178, 73–94. https://doi.org/10.19111/bulletinofmre.1764827

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