The Nevruztepe iron-copper prospect is a skarn near Yeşilhisar (Kayseri). It has been overlooked as a potential producer of copper. The skarn was generated in Permian to Jurassic carbonate rocks by the Eocene Yahyalı granitic pluton. Lithologic units, including skarns, dip about 15 degrees southward. Skarns are both prograde (garnet and diopside) and retrograde (epidote); both exoskarn and endoskarn exist. Most of the magnetite is in a quartz-sulfide stage in retrograde skarn that is cut by veins and lenses containing quartz-pyrite-chalcopyrite. Granite and mineralized skarn are rare at the surface. From 2013 to 2015, 31 drill holes (totaling 6.178,5 m) encountered skarn to a depth of 450 m. Mineralized zones vary from 1,2 to 54,7 m thick. Fe mean grade ranges from 12% to 49%; mean copper grades vary from 10 to 4650 ppm. The deposit contains 5.096.788 tonnes of mineralized material. Microscopy on samples of drill core shows that the ore minerals are primarily magnetite, hematite, and chalcopyrite. Some magnetite is altered to hematite. Experiments show that with grinding to 100 microns the iron can be beneficiated to 66%. Waste from separation of the magnetite is 0.16 to 0.19% Cu; with flotation this was beneficiated to 19% Cu.
Yahyalı pluton Skarn Magnetite Copper Kayseri Kayseri Yeşilhisar
This article is based on data obtained during studies within the scope of the Western and Central Anatolia Iron Exploration Project organised by General Directorate of MTA Department of Mining and Exploration from 2012-2016. The authors wish to thank the management of General Directorate of MTA for all aspects of their support and the Prof. Dr. Eric Cheney, Prof.Dr. Nurullah Hanilçi and the other reviewers for their criticisms and recommendations about the manuscript. The authors wish also to thank Zehra Deveci Aral for her contribution to the English translation of the manuscript.
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 15 Nisan 2020 |
Yayımlandığı Sayı | Yıl 2020 Cilt: 161 Sayı: 161 |
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