Preliminary Findings of Fe-Skarn Mineralization in Southeast Anatolian Orogenic Belt (Pertek, Tunceli)
Abstract views: 168
/ 
PDF downloads: 110
DOI:
https://doi.org/10.59287/ijanser.641Keywords:
Southeast Anatolian Orogenic Belt (SAOB), Fe-Skarn, Keban Metamorphites, Yüksekova Complex, XRD, Pertek (Tunceli)Abstract
The Southeast Anatolian Orogenic Belt (SAOB), one of the most important belts in Turkey, is located north of the Bitlis-Zagros Suture Zone. Major iron mineralizations are also observed along this belt. The Pertek (Tunceli) region is one of the dominant Fe-Skarn mineralizations. Keban Metamorphites of Permo-Carboniferous age forms the basement of the region. It is mainly represented by metacarbonates, marbles and schists, respectively. This unit is also cut by intrusive rocks from the Upper Cretaceous Elazığ Magmatic Complex (EMC). Tertiary volcanic rocks and sedimentary rocks also overlie both units with angular unconformity. Fe-Skarn was formed at the contact of carbonates belonging to Keban Metamorphites and diorites belonging to EMC. Macroscopically, magnetite crystals and garnet can be observed in the skarn formation, which is easily distinguished by its colour. Polarizing microscopy revealed quartz, calcite, garnet, pyroxene, chlorite and opaque minerals. X-ray diffraction (XRD) analysis revealed that the garnet is andraditic, and the ore minerals are magnetite and hematite. In the ore microscopy, it was determined that magnetite was first transformed into hematite and then hematite into goethite. Regarding the major oxide concentrations of the samples taken from the region, it was determined that the Fe2O3 value reached a maximum of 60% (average 21.94%), SiO2 (average 38.20%) and CaO (average 23.58%) concentrations were high, and Al2O3 concentration was generally low. Al2O3 concentration reaches 17.96 % in the sample where clayification is common. The findings of this study provide a baseline for identifying the origin of the Pertek Fe-Skarn formation.
Downloads
References
M. T. Einaudi, L.D. Meinert and R.J. Newberry, Skarn Deposits, Econ Geol, 1981, 75th Anniversary vol. pp 317–391.
L.D. Meinert, Application of Skarn Deposit Zonation Models to Mineral Exploration, Explor Min Geol 1997, vol. 6. pp. 185–208.
L.D. Meinert, G.M. Dipple and S. Nicdescu, World Skarn Deposits, 100th Anniversary volume. Eco Geol 2005, pp:299–336.
N.A. Grigoryev, V.N. Sazonov, V.V. Murzin and V. Gladkovskiy, Sulfides as Gold Carriers in Skarn Magnetite Deposit Skarns and Ores, Geochem Int, 1990, vol. 27, pp:142–146.
Y. Yılmaz, E. Yiğitbaş and İ. Çemen, Tectonıcs of the Southeast Anatolıan Orogenıc Belt, Earth and Space Science Open Archive, 2022, 40. https://doi.org/10.1002/essoar.10510308.1.
A. Sagiroglu, Pertek-Demürek (Tunceli) Skarn Type Magnetite and Associated Copper Mineralizations. Geological Bulletin of Turkey, 1992, vol.35, pp: 63–70. in Turkish with English abstract.
M. Altunbey, “Geology and Origin of Iron Mineralizations of Tuzbaşi–Kanatburun–Ayazpinar (Pertek–Tunceli) Area”, Fırat University Graduate School of Science and Technology, PhD Thesis, p. 176 (in Turkish with English abstract), 1996.
B. Akgul and A. Şaşmaz, The Pyrometasomatic Formations and Associated Fe–Ti Mineralizations at The North of Elazig. Geological Bulletin of Turkey 1996, vol. 39 (2), pp: 39–48 (in Turkish).
M. Altunbey and A. Sagiroglu, Skarn-Type Ilmenite Mineralization of the Tuzbaşi–Tunceli Region, Eastern Turkey, Journal of Asian Earth Sciences, 2003, Vol. 21, Issue 5, pp: 481-488, ISSN 1367-9120, https://doi.org/10.1016/S1367-9120(02)00077-9.
I. Ketin, Anadolu’nun Tektonik Birlikleri (tectonic units of Anatolia). Bull. Min.. Res. Explor. 1966, vol. 66, pp. 23-34.
N. Ozgül, “Stratigraphy and tectonic evolution of the central taurides”. In: Tekeli, O., Göncüoglu, M.C. (Eds.), International Symposium on the Geology of the Taurus Belt, 1984, Proceedings. MTA, Ankara, pp. 77-90, 26-29 September.
N. Özgül, Some Geological Aspects of the Taurus Orogenic Belt (Turkey). Bull Geol Soc Turk, 1976, vol. 19, pp: 65–78 (in Turkish with English abstract).
D. Perinçek, “Geology and Petroleum Potential of the Area Palu– Karabegan–Elazıg–Sivrice–Malatya”, TPAO Report No: 1361, (in Turkish, unpublished) 1979.
B. Akgül, “Petrographical and Petrological Features of Magmatic Rocks in the Vicinity of Piran Village (Keban–Elazıg)”, Fırat University Graduate School of Science and Technology, PhD Thesis, p. 128 (in Turkish with English abstract), 1993.
M. Ural, M. Arslan, M.C. Goncüoglu, U.K. Tekin and S. Kürüm, Late Cretaceous arc and back-arc formation within the southern Neotethys: whole-rock, trace element and Sr-Nd Pb isotopic data from basaltic rocks of the Yüksekova Complex (Malatya-Elazig, SE Turkey), Ofioliti, 2015. Vol. 40 (1), pp: 52-72.
A. Sar, M.A. Ertürk, M.E. Rizeli, 2019, Genesis of late Cretaceous intra-oceanic arc intrusions in the Pertek area of Tunceli Province, Eastern Turkey, and implications for the geodynamic evolution of the southern Neo-Tethys: results of zircon U–Pb geochronology and geochemical and Sr–Nd isotopic analyses. Lithos vol. 350–351, pp. 105263.
A.I. Okay and O. Tüysüz, Tethyan Sutures of Northern Turkey. Geol. Soc. Lond. Spec. Publ. 1999, vol. 156, pp:475–515. https://doi.org/10.1144/GSL.SP.1999.156.01.22.
İ. Kuşcu, 2019, Skarns and Skarn Deposits of Turkey. In: F.,Pirajno, T. Ünlü, C. Dönmez, M. Şahin, (eds) Mineral Resources of Turkey. Modern Approaches in Solid Earth Sciences, vol 16. Springer, Cham. https://doi.org/10.1007/978-3-030-02950-0_7
