TY  - JOUR
T1  - Pegmatites and alkali feldspar granites as sources of industrial k-feldspar: a study from Borucu, Aksaray, Central Türkiye
AU  - Demirela, Gökhan
AU  - Terzi, Mustafa Haydar
AU  - Oskay, Ahmet Fatih
PY  - 2025
DA  - September
Y2  - 2025
DO  - 10.19111/bulletinofmre.1764827
JF  - Bulletin  of the Mineral Research and Exploration
JO  - Bull.Min.Res.Exp.
PB  - Maden Tetkik ve Arama Genel Müdürlüğü
WT  - DergiPark
SN  - 0026-4563
SP  - 1
EP  - 2
VL  - 178
IS  - 178
LA  - en
AB  - 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 in 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.
KW  - Alkali Feldspar Granite
KW  - Pegmatite
KW  - K-Feldspar
KW  - Magnetic Separation
CR  - Afşin, M., Yıldız, M., Ceylan, Z., Küre, İ. S. 2019. Ekecik beslenim alanı (EBA)’ndaki içme suyu kaynaklarının hidrojeokimyasal ve izotopik özelliklerinin değerlendirmesi, Ortaköy, Aksaray, Orta Anadolu. DSİ Teknik Bülteni 134, 37-46.
CR  - Akıman, O., Erler, A., Göncüoğlu, M. C., Güleç, N., Geven, A., Türeli, T. K., Kadıoğlu, Y. K. 1993. Geochemical characteristics of granitoids along the western margin of the Central Anatolian Crystalline Complex and their tectonic implications. Geological Journal 28, 3-4, 371–382.
UR  - https://doi.org/10.19111/bulletinofmre.1764827
L1  - https://dergipark.org.tr/tr/download/article-file/5153224
ER  -