201602

Abstracts and References

Published

The Bauxite deposits of Seydişehir region (Mortaş and Doğankuzu deposits); Their geological, mineralogical and geochemical characteristics

Celalettin Uyanik , Kerim Kocak, Adnan Doyen

Abstract

Turkey hosts essential bauxite deposits, typically of the karstic-type. The most economically important bauxite deposits of Turkey form in the Seydişehir-Akseki region of the central Taurides Mountains. The Mortaş and Doğankuzu deposits are the most important deposits in that region. The bauxite beds contain boehmite, hematite, rutile, smectite, quartz, diaspore, calcite, pyrite, marcasite and goethite. Brown to red-colored bauxite minerals are massive, oolitic – pisolitic textured. The Seydisehir schists could be possible parent rocks of bauxites, and have unearthed acidic source (mostly granite) with hornblende and plagioclase minerals. The schists were compositionally mature with minimal alkali feldspar sediments.

The Mortaş deposit is 400 m long and up to 40 m thick; it averages 10 m thick. It has about 5 million tons of ore reserves, with ~50 percent Al₂O₃. The Doğankuzu bauxite deposit is situated 2 km southwest of the Mortaş deposit, with 14.9 million metric tons of ore at 61 percent Al₂O₃. The Doğankuzu ore was deposited on a fault-controlled karst surface of Cenomanian limestone succession, which was overlain by 5- to 10-cm-thick Santonian limestones. The bauxite has been mined by the Seydişehir aluminum factory, which was founded in 1973, and privatized in 2005. The plant is capable to produce 65.000 ton liquid aluminum per year, around 15% of Turkey’s Aluminum demand.

Keywords: Geology, bauxite, karstic, Tauride, Seydisehir;

Acta Geobalcanica | Volume 2 | Issues 1 | Pp: 21-26;

DOI: http://dx.doi.org/10.18509/AGB.2016.02

Full Text PDF

Available Online First: 21 January 2016

References

[1] Hanilçi, N., Geological and geochemical evolution of the Bolkardaği bauxite deposits, Karaman, Journal of Geochemical Exploration, 133, 2013, pp118–137,

[2] Karadag, M.M., Kupeli, S., Arik, F., Ayhan, A., Rare earth element (REE) geochemistry and genetic implications of the Mortas- bauxite deposit (Seydisehir / Konya –Southern Turkey), Chemie der Erde 69, 2009, pp 143–159.

[3] Öztürk, H., Hein, J. R., Hanilçi, N., Genesis of the Dogankuzu and Mortas¸ Bauxite Deposits, Taurides, Turkey: Separation of Al, Fe, and Mn and Implications for Passive Margin Metallogeny, Economic Geology, 97, , 2002, pp1063–1077.

[4] Özlü, N., Etude géologique minéralogue et géochmıque des bauxites de la région D’Akseki-Seydisehir Taurus occidental - Turquie: Unpublished Ph.D. dissertation, Pierre Marie Curie University, Paris, 1978, pp 455 .

[5] Boynton, W.V., Cosmochemistry of the Rare Earth Elements: Meteorite studies. In Rare earth elements, Edited by P. Henderson. Elsevier, Amsterdam, The Netherlands, 1984, pp. 63–114.

[6] Floyd, P.A., Winchester, J.A., Park, R.G., Geochemistry and tectonic setting of Lewisian clastic metasediments from the Early Proterozoic Loch Maree Group of Gairloch, N.W. Scotland: Precambrian Research, 45(1–3), 1989, pp 203–214.

[7] Cox, R., Low, D.R., Cullers, R.L. The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States. Geochim. Cosmochim. Acta 59, 1995, pp 2919–2940.