Mustafa AKYILDIZ, İsmet CENGİZ, Güzide ÖNAL, Serkan ÖZKÜMÜŞ, Mehmet ASLAN

DOĞU PONTİDLERDE OLUR (ERZURUM) BÖLGESİNDE EOSEN MAGMATİZMASINA BAĞLI ALTERASYON ZONLARI VE ÖNEMİ

Alpin Orojenez Kuşağı, Doğu Avrupa’dan başlayıp, Türkiye ve Kafkaslar’dan geçerek, İran veAfganistan’a kadar uzanan ve üzerinde birçok porfi ri Cu-Mo-Au yatağı bulunduran bir kuşaktır. Çalışmaalanının yer aldığı Doğu Pontidler, bu kuşak içerisinde yer almaktadır. Bu çalışmada Olur (Erzurum)bölgesinde Yeşilbağlar, Kaban ve Köprübaşı alterasyon zonları ele alınarak, arazi ve laboratuvarçalışmaları ile alterasyon zonunun kökenine dair bir yaklaşımda bulunulması amaçlanmaktadır. Çalışmaalanındaki alterasyon, Erken Eosen yaşlı Coşkunlar volkanik ve subvolkanik kayalarının dokanak halindebulunduğu Erken-Orta Jura yaşlı Oltuçayı volkanikleri ve Kaban volkaniklerini etkilemektedir. Alterasyonzonlarında gözlenen mineralizsyon, Erken Eosen yaşlı altere Coşkunlar Dasiti içinde saçınımlı, ağsal,damar/damarcık ve çatlak dolgusu olarak görülmektedir. Alterasyon zonundaki parajenez pirit, kalkopirit,sfalerit, galen ve pirotin, kuvars, kalsit ve baritten oluşmaktadır. FT-IR ve XRD analizleri sonucundaalterasyon zonunda kil, sülfat, sülfür, karbonat, silikat ve oksit mineralleri saptanmıştır. Arazi, petrografi ,FT-IR ve XRD analizleri sonucunda elde edilen veriler; Yeşilbağlar, Kaban ve Köprübaşı bölgelerindebelirlenen alterasyonlar (ileri arjilik-arjilik, propilitik ve serisitik alterasyon) Alpin Orojenik Kuşakiçerisinde yer alan porfi ri sistemde oluşan alterasyon zonlarının üst kesimlerine ve mineralizasyonlarabenzerlik gösterdiğini desteklemektedir. Doğu Pontidler’de Erken Jura döneminden beri süregelen yitimebağlı olarak İzmir-Ankara-Erzincan okyanusu kapanmaya başlamış olup Toros platformu ile Avrasya aktifkıta kenarının çarpışması Erken Eosen döneminde gerçekleşmiştir. Çalışma alanından elde edilen veriler,gömülü porfi ri sitemlerin üst bölümlerine ait alterasyon zonunu işaret etmekte ve cevherli zonun dahaderinde konumlanmış olabileceğini göstermektedir.

ALTERATION ZONES ASSOCIATED WITH EOCENE MAGMATISM IN THE OLUR (ERZURUM) AREA, EASTERN PONTIDES AND THEIR SIGNIFICANCE

The Alpine Orogenic Belt with numerous porphyry Cu-Mo-Au mineralizations, starts from Eastern Europe continues through Turkey and the Caucasus and extends into Iran and Afghanistan. The study area of the Eastern Pontides is in this orogenic belt. Using fi eld and laboratory studies an attempt has been made to establish the origin of Yeşilbağlar, Kaban and Köprübaşı alteration zones in the Olur area (Erzurum). In the study area Early Eocene Coşkunlar volcanics and sub volcanic rocks have contact with the Oltu çayı volcanics of Early-Middle Jurassic. Alteration in the study area effects these Oltuçayı and Kaban volcanics. In the study area mineralizations are present in the alteration zones. Disseminated, stockwork, vein/veinlet and fi ssure type mineralizations are present in the Coşkunlar dacite. Paragenesis in the alteration zones are pyrite, chalcopyrite, sphalerite, galena, pyrrohotite, quartz, calcite and barite. FT-IR and XRD studies showed the presence of clay, sulphate, sulphur, carbonate, silicate and oxide minerals in the alteration zones. Field and petrographical studies showed that alteration types in the Yeşilbağlar, Kaban and Köprübaşı areas are, advanced argillic-argillic, pyropylitic and sericitic. They are similar to the alterations present in the upper part of the mineralizations in the porphyry systems of the Alpine Orogenic Belt. In the Eastern Pontides starting in Early Jurassic, continuation of subductions resulted in closure of the İzmir-AnkaraErzincan ocean and in Early Eocene the Taurid platform collided with the Eurasian active continental margin. Data from the study area indicate the presence of alteration zones in the upper part of the buried porphyry system and the possibility of mineralized parts in the deeper parts of the system.

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Akıncı, Ö. T. 1984. The eastern Pontide volcanosedimentary belt and associated massive sulphide deposits. In: Dixon, J. E. and Robertson, A. H. F. (Eds.) The Geological Evolution of the Eastern Mediterranean. Geological Society, London, Special Publications, 17, 415-428.
Altınlı, İ.E. 1973. Orta Sakarya’nın jeolojisi, Cumhuriyet’in 50. Yılı Yerbilimleri Kong. Tebliğleri. Maden Arama ve Tetkik yayını, s. 159-191.
Aral, H., Erler, A. 1981. Porfi ri Bakır Yatakları, ODTÜ Mühendislik Fakültesi Yayını, No: 67, Ankara.
Ayhan, A. 1991. Maden Jeolojisi Arama ve Etüt Teknikleri. S.Ü. Mimarlık-Mühendislik Fakültesi, Konya, 328 s.
Berger, B.R., Ayuso, R.A., Wynn, J.C., Seal, R.R. 2008. Preliminary Model of Porphyry Copper Deposits. U.S. Geological Survey, Open-File Report 2008- 1321, 55 p.
Bralia, A., Sabatini, G., Troja, F. 1979. A revaluation of the Co/Ni ratio in pyrite as geochemical tool in ore genesis problems. Mineral. Deposita, 14, 353- 374.
Brill, B.A. 1989. Deformation textures and recrystallisation microstructures in deformed ores from the CSA mine, Cobar, Australia. Journ. of Struct. Geol., 11, 591-601.
Cook, N.J. 1996. Mineralogy of the sulphide deposists at sulitjelma, northern Norway. Ore Geol. Rev., 11, 303-338.
Craig, J.R., Vaughan, D.J. 1981. Ore Microscopy and Ore Petrology. John Wiley and Sons, p. 406.
Craig, J.R., Vokes, F.M. 1993. The metamorphism of pyrite and pyritic ores: an overview, Mineral. Mag., 57, 3-18.
Craig, J.R., Vaughan D.J., 1994. Ore microscopy and ore petrography, 2nd. Edition.
Craig, J.R., Vokes, F.M., N Solberg, N. 1998. Pyrite Physical and chemical textures. Mineralium Deposita, 34, p. 82-101.
Çağatay, A., Çağatay, N. 1978. Porfi ri Bakır Yatakları, Yeryuvarı ve İnsan, 3/1, 32-37.
Çağatay, M. N., Boyle, D. R. 1980. Geology, geochemistry and hydrothermal alteration of the Madenköy massive-sulphide deposits, Eastern Black Sea region, Turkey. In: Ridge, J. D. (Ed.) International Association of the Genesis of Ore Deposits (IAGOD). 5th Symposium Proceedings, E. Schweizerbartsche Verlagsbuchhandlung, Stuttgart, 653-678.
Çelik, Ö. F., Marzoli, A., Marschik, R., Chiaradia, M., Neubauer, N., Öz, İ. 2011. Early-Middle Jurassic intra-oceanic subduction in the İzmirAnkara-Erzincan Ocean, Northern Turkey. Tectonophysics, 509, 120-134.
Çolakoğlu, O. A., Özen, H., Türkel, A., Sayak, H., Dönmez, C., Odabaşı, İ. 2009. Tekman-Pasinler-Karayazı (Erzurum) yöreleri Cr-Ni prospeksiyon raporu. Maden Tetkik ve Arama Genel Müdürlüğü (MTA) Rapor: 11117, Ankara (yayımlanmamış).
Demir, Y. 2010. Kabadüz (Ordu, KD-Türkiye) Yöresi Pb-Zn-Cu Cevherlerinin Jeolojik, Mineralojik, Jeokimyasal ve Kökensel İncelenmesi, Doktora Tezi, Karadeniz Teknik Üniversitesi Fen Bilimleri Enstiüsü, Trabzon.
Dibenedetto, F., Bernardini, G.P., Costagliola, P., Plant, D., Vaughan, D. 2005. Compositional zoning in sphalerite crystals. Amer. Mineral., 90, 1384- 1392.
Einaudi, M.T., Hedenquist, J.W., Inan, E.E. 2003. Sulfi dation state of fl uids in active and extinct hydrothermal systems: Transitions from porphyry to epithermal environments. Society of Economic Geologists Special Publication, 10, 285-313.
Er, M., Özdoğan, K., Tüysüz, N. 1995. Geology and mineralization of Güzelyayla porphyry CuMo occurrence, Trabzon, NE Turkey, In: Erler, A., Ercan T., Bingol, E. and Orcen, S. (Eds.), Proceedings of the International Symposium on the geology of the Black Sea Region, Ankara, MTA and JMO, p. 226-231.
Evans, A.M. 1987. An Introduction to Ore Geology, Blackwell Sci. Publ. (2ed.), 358 p.
Evans, I., Hall, S. A. 1990. Palaeomagnetic constraints on the tectonic evolution of the Sakarya continent, northwestern Anatolia. Tectonophysics, 182, 357- 372.
Galoyan, G., Rolland, Y., Sosson, M., Corsini, M., Melkonyan, R. 2007. Evidence for superposed MORB, oceanic plateau and volcanic arc series in the Lesser Caucasus (Stepanavan, Armenia). Comptes Rendus Geosciences, 339, 482-492.
Galoyan, G., Rolland, Y., Sosson, M., Corsini, M., Billo, S., Verati, C., Melkonyan, R. 2009. Geology, geochemistry and 40Ar/39Ar dating of Sevan ophiolites (Lesser Caucasus, Armenia): evidence for Jurassic Back-arc opening and hot spot event between the South Armenian Block and Eurasia. Journal of Asian Earth Sciences, 34, 135-153.
Giles, D.L. 1973, Geology and mineralization of the Ulutaş Copper-molybdenum prospect, UNDP Mineral Exploration in Two Areas, General Directorate of Mineral Research and Exploration (MTA), Report: 5237, 40 p., Ankara (yayımlanmamış).
Gottesman, W., Kampe, A. 2007. Zn/Cd ratios in calcsilicate- hosted sphalerite ores at TumurtijnOvoo, Mongolia. Chemie Der Erde, 67, 323-328.
Grammatikopoulos, T.A., Roth, T. 2002. Mineralogical characterization and Hg deportment in field samples from the Polymetallic Eskay Creek Deposit, British Columbia, Canada. Int. J. Surf. Min. Recl., 16, 180-195.
Hakyemez, H. Y., Konak, N. 2001. Tectonic evolution and stratigraphy of Eocene basins in the easternmost part of the Pontides. In: Proceedings of the 2nd International Symposium on the Petroleum Geology and Hydrocarbon Potential of the Black Sea Area. Turkish Association of Petroleum Geologists, Special Publications, Ankara, 4, 19- 25.
Hedenquist, J.W., Claveria, R.J.R., Villafuerte, G.P. 2001. Types of sulfi de-rich epithermal deposits, and their affi liation to porphyry systems: Lepanto-VictoriaFar Southeast deposits, Philippines. Congreso Internacional de Prospectores y Exploradores, 2nd, Lima, Instituto de Ingenieros de Minas del Perú, CD-ROM, 29 p.
Hezarkhani, A. 2006. Hydrothermal evolution of the Sar-Cheshmeh porphyry Cu-Mo deposit, Iran, Evidence from fl uid inclusions, Journal of Asian Earth Sciences, v. 28, p. 409-422.
Hirst, D. M., Eğin, D. 1979. Localization of massive, polymetallic sulphide ores in the northern Harşit River area, Pontide Volcanic Belt, Northeastern Turkey. Annales de la Societé Géologique de Belgique, 102, 465-484.
Holten, T., Jamtveita, B., Meakina, P. 2000. Noise and oscillatory zoning of minerals. Geochim. Cosmochim. Acta, 64-11, 1893-1904.
Jankovic, S. 1977. Major Alpine ore deposits and metallogenic units in the northeastern Mediterranean and concepts of plate tectonics, Jankovic, S. (Eds.) Metallogeny and Plate Tectonics in Northeastern Mediterranean, Univ. Belgrade, p. 105-171.
Jonasson, I.R., Sangster, D.F. 1978. Zn/Cd ratios for sphalerites from some Canadian sulfi de ore samples. Geol. Surv. Can., 78, 195-201.
Kant, W., Warmada, I.W., Idrus, A., Setijadji, L.D., Watanabe, K. 2012. Ore Mineralogy and Mineral Chemistry of Pyrite, Galena, and Sphalerite at Soripesa Prospect Area, Sumbawa Island, Indonesia. J. SE Asian Appl. Geol., 4 (1), 1-14.
Karakaya, M.Ç. 2006. Kil Minerallerinin Özellikleri ve Tanımlama Yöntemleri, Ankara, 640 s.
Kesler, S.E., Wilkonson, B.H. 2006. The role of exhumation in the temporal distribution of ore deposits. Economic Geology, 101, 1096-1117.
Ketin, İ. 1966. Anadolu’nun Tektonik Birlikleri. Maden Tetkik ve Arama Genel Müdürlüğü Dergisi, Ankara, 66, 20-30.
Konak, N., Hakyemez, H.Y. 1996. Tectonic units of the easternmost Pontides: stratigraphical and structural implications. In: Derman, A.S., Toksoy, F., Yılmaz, E. (Eds.), Proceedings of 2nd International Symposium on the Petroleum Geology and Hydrocarbon Potential of the Black Sea Area, İstanbul, Turkey, 32-33.
Konak, N., Hakyemez, H.Y., 2001. Tectonic units of the easternmost part of the Pontides: Stratigraphical and structural implications. In: Derman, A.S., Toksoy, F., Yılmaz, E. (Eds.), Proceedings of the 2nd International Symposium on the Petroleum Geology and Hydrocarbon Potential of the Black Sea Area, Şile-Turkey, 22-24th September 1996, Turkish Association of Petroleum Geologist, Special Publication, Ankara, Turkey, 4, p. 93-103.
Konak, N., Hakyemez, H. Y., Bilgiç, T., Bilgin, R., Hepşen, N. ve Ercan, T. 2001. Kuzeydoğu Pontidlerin (Oltu-Olur-Şenkaya-Narman-UzundereYusufeli) Jeolojisi. Maden Tetkik ve Arama Genel Müdürlüğü (MTA), Rapor No: 10489, Ankara(yayınlanmamış).
Konak, N., Hakyemez, H. Y. 2008a. 1/100 000 ölçekli Türkiye jeoloji haritaları serisi, Kars-G48 paftası. Maden Tetkik ve Arama Genel Müdürlüğü, Jeoloji Etütleri Dairesi, 104, 69s.
Konak, N., Hakyemez, H. Y. 2008b. 1/100 000 ölçekli Türkiye jeoloji haritaları serisi, Tortum-H47 paftası. Maden Tetkik ve Arama Genel Müdürlüğü, Jeoloji Etütleri Dairesi, 95, 46s.
Kraeff, A. 1963. Geology and mineral deposits oft he HopaMugrul region. Bulletin of the Mineral Research and Exploration Institute of Turkey, 60, 44-59.
Kuşçu, İ., Erler, A. 1999. Deformation of stibnites and pyrites in the Madsan antimony deposit (Niğde, Turkey): implications for pressure-temperature conditions of local deformation. Turkish Journal of Earth Sciences, 8, 57-66.
Kuşçu, İ., Erler, A. 2002. Pyrite deformation textures in the deposits of the Küre mining district (Kastamonu, Turkey). Turkish Journal of Earth Sciences, 11, 205-215.
L’Heureux, I., Jamtveıt, B. 2002. A model for oscillatory zoning in solid solutions grown from aqueous solutions: applications to the (Ba, Sr)SO4 system. Geochim. Cosmochim. Acta, 66, p. 417-429.
Lianxing, G., McClay, K.R. 1992. Pyrite deformation in stratiform lead-zinc deposits of the Canadian Cordillerea. Mineral. Deposita, 27, 169-181.
Loftus-Hills, G., Solomon, M. 1967. Cobalt, nickel and selenium in sulphides as indicators of ore genesis. Mineral. Deposita, 2, 228-242.
Lowell, J.D., Guilbert, J.M. 1970. Lateral and vertical alteration-mineralization zoning in porphyry ore deposits. Economic Geology, 65, 373-408.
Lowell, J.D., Guilbert, J.M. 1974. Variations in Zoning Patterns in Porphyry Ore Deposits. CIM Bull., 61. McClay, K.R., Ellis, P.G. 1984. Deformation of pyrite, Economic Geology, 79, 400-403.
Meyer, C., Hemley, J.J. 1967. Wall-rock alteration. In: Barnes, H.L. (Ed.), Geochemistry of hydrothermal ore deposits, 1st ed., New York, Holt, Rinehart Winston, 166-235.
Mitchell, A.H., Bell, J.D. 1973. Island-arc evolution and related mineral deposits. Journ. Geol., 81, 381- 405.
Moore, W.J., McKee, E.H., Akinci, O.T. 1980. Chemistry and chronology of plutonic rocks in the Pontid mountains, northern Turkey. In: Jankovic, S., Sillitoe, R.H. (Eds.) European Copper Deposits: Belgrade, UNESCO-IGCP, 209-216.
Oğuz, E. 2010. Ulutaş (İspir-Erzurum) Bakır-Molibden Porfi ri Sisteminin Yeniden Değerlendirilmesi ve Altın Potansiyelinin Araştırılması. Yüksek Lisans Tezi, Hacettepe Üniversitesi Fen Bilimleri Enstitüsü, 110 s., Ankara.
Ohta, E., Doğan, R., Batık, H., Abe, M. 1988. Geology and mineralization of Dereköy porphyry copper deposit, northern Thrace, Turkey, Bulletin of the Geological Survey of Japan, v. 39, p. 115-134.
Okay, A. I. 1984. The geology of the Ağvanis metamorphic rocks and neighbouring formations. Bulletin of the Mineral Research and Exploration Institute of Turkey, 99/100, 16-36.
Okay, A.İ., Şahintürk, Ö. 1997. Geology of the Eastern Pontides. In: Robinson, A. G. (Ed.) Regional and Petroleum Geology of the Black Sea and Surrounding Region. American Association of Petroleum Geologists, Tulsa, OK, Memoirs, 68, 291-311.
Okay, A. İ., Tüysüz, O. 1999. Tethyan sutures of northern Turkey. In: Durand, B., Jolivet, L., Horvath, F., Séranne, M. (Eds.) The Mediterranean Basins: Tertiary Extensions within the Alpine Orogen. Geological Society of London, Special Publications, 156, 474-515.
Okay, A. İ., Tüysüz, O., Satır, M., Özkan-Altıner, S., Altıner, D., Sherlock, S., Eren, R. H. 2006. Cretaceous and Triassic subduction-accretion, high pressure– low temperature metamorphism, and continental growth in the Central Pontides, Turkey. Geological Society of America Bulletin, 118, 1247-1269.
Önal, G. 2015. Yeşilbağlar-Kaban (Olur-Erzurum) Bölgesindeki Alterasyonların Mineralojik ve Jeokimyasal İncelenmesi. Doktora Tezi, Çukurova Üniversitesi Fen Bilimleri Enstitüsü, Adana, 182 s. Ankara (yayımlanmamış).
Özen, H., Çolakoğlu, A. O., Sayak, H., Dönmez, C., Türkel, A., Odabaşı, İ. 2008. Erzincan-TercanÇayırlı yöresi ofi yolit jeolojisi ve krom-nikel prospeksiyon raporu. Maden Tetkik ve Arama Genel Müdürlüğü (MTA) Rapor No: 11055, Ankara (yayınlanmamış)
Palero, F.J., Martin-Izard, A. 2005. Trace element contens in galena and sphalerite from ore deposits of the Alcudia Valley mineral fi eld, Eastern Sierra Morena, Spain. Jour. of Geochem. Expl., 86, 1-25.
Parlak, O., Çolakoğlu, A., Dönmez, C., Sayak, H., Türkel, A., Yıldırım, N., Odabaşı, I. 2013. Geochemistry and Tectonic Signifi cance of Ophiolites Along the İzmir-Ankara-Erzincan Suture Zone in northeastern Anatolia. In: Robertson, A.H.F.,
Parlak, O., Ünlügenç, U. C. (Eds.) Geological Development of Anatolia and the Easternmost Mediterranean Region. Geological Society of London, Special Publication, 372, 75-105.
Pejatovic, S. 1971. Doğu Karadeniz-Küçük Kafkasya bölgesindeki metalojenik zonlar ve bunlann metalojenik özellikleri. MTA Dergisi, 77, 1-14.
Pirajno, F. 1992. Hydrothermal mineral deposits: Principles and fundamental Concepts for Exploration geologist. Springer-Verlag, Berlin, 709 p.
Pirajno, F. 2009. Hydrothermal processes and mineral systems, Dordrecht; London. Springer, Geological Survey of Western Australia, 1250 p.
Popov, P., Berza, T., Grubic, A., Ioane, D. 2002. Late Cretaceous Apuseni-Banat-Timok-Srednagorie (ABTS) magmatic and metallogenic belt in the Carpathian-Balkan orogen, Geologic Balcanica, v. 32, p. 145-163.
Raymond, O.L. 1996. Pyrite composition and ore genesis in the Prince Lyell copper deposit, Mt Lyell mineral fi eld, western Tasmania, Australia. Ore Geol. Rev., 10, 231-250.
Rice, S. P., Robertson, A. H. F., Ustaömer, T. 2006. Late Cretaceous–Early Ceneozoic tectonic evolution of the Eurasian active margin in the Central and Eastern Pontides, northern Turkey. In: Robertson, A. H. F., Mountrakis, D. (Eds.) Tectonic Development of the Eastern Mediterranean Region. Geological Society, London, Special Publications, 260, 413-445.
Rice, S. P., Robertson, A. H. F., Ustaömer, T., İnan, N., Taslı, K. 2009. Late Cretaceous–Early Eocene tectonic development of the Tethyan suture zone in the Erzincan area, Eastern Pontides, Turkey. Geological Magazine, 146, 567-590.
Richards, J.P. 2003. Tectono-magmatic precursors for porphyry Cu-(Mo-Au) deposit formation. Economic Geology, 98, 1515-1533.
Roberts, F.I. 1982. Trace element chemistry of pyrite: A useful guide to the occurance of sulfi de base metal mineralization, Jour. of Geoch. Expl., 17, 49-62.
Robertson, A. H. F., Parlak, O., Ustaömer, T., Taslı, K., İnan, N., Dumitrica, P., Karaoğlan, F. 2013. Subduction, ophiolite genesis and collision history of Tethys adjacent to the Eurasian continental margin: new evidence from the Eastern Pontides, Turkey. Geodinamica Acta, 26 (3-4), 230-293.
Rolland, Y., Billo, S., Corsini, M., Sasson, M., Galoyan, G. 2009a. Blueschists of the Amassia-Stepanavan suture zone (Armenia): linking Tethys subduction history from E-Turkey to W-Iran. International Journal of Earth Sciences, 98, 533-550.
Rolland, Y., Galoyan, G., Bosch, D., Sosson, M., Corsini, M., Fornari, M., Vérati, C. 2009b. Jurassic Backarc and hot-spot related series in the Armenian ophiolites – Implications for the obduction process. Lithos, 112, 163-187.
Rolland, Y., Galoyan, G., Sosson, M., Melkonyan, R., Avagyan, A. 2010. The Armenian Ophiolite: insights for Jurassic back-arc formation, Lower Cretaceous hot spot magmatism and Upper Cretaceous obduction over the South Armenian Block. In: Sosson, M., Kaymakçı, N., Stephenson, R. A., Bergerat, F., Starostenko, V. (Eds.) Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. Geological Society, London, Special Publications, 340, 353- 382.
Sarıfakıoğlu, E., Özen, H., Winchester, J. A. 2009. Petrogenesis of Refahiye ophiolite and its tectonic signifi cance for Neotethyan ophiolites along the İzmir-Ankara-Erzincan Suture zone. Turkish Journal of Earth Sciences, 18, 187-207.
Seedorff, E., Dilles, J.H., Profett, J.M., Jr., Einaudi, M.T., Zurcher, L., Stavast, W.J.A., Johnson, D.A., Barton, M.D. 2005. Porphyry deposits: Characteristics and origin of hypogene features. Economic Geology 100th Anniversary Volume, 251-298.
Sillitoe, R.H. 1972. A plate tectonic model for the origin of porphyry copper deposits. Econ. Geol., 67, 184- 197.
Sillitoe, R.H. 1973. The Top and Bottoms of Porphyry Copper Deposits. Econ. Geol., 65, 373-408.
Sillitoe, R.H. 1993. Giant and bonanza gold deposits in the epithermal environment. In: Whiting B.H., Mason R., Hodgson C.J. (Eds.) Giant ore deposits, Soc. Econ. Geol. Spec. Publ., 2, 125-156.
Sillitoe, R.H. 2010. Porphyry Copper System. Society of Economic Geologists, Ins. Economic Geology, 105, 3-41.
Sillitoe, R.H., Hedenquist, J.W. 2003. Linkages between volcanotectonic settings, ore-fl uid compositions, and epithermal precious-metal deposits. In: Simmons, S.F., Graham, I. (Eds.), Volcanic, geothermal, and ore-forming fl uids: rulers and witnesses of processes within the earth. Society of Economic Geologists Special Publication, 10, 315-343.
Singer, D.A., Berger, V.I., Moring, B.C. 2008. Porphyry copper deposits of the world: Database and grade and tonnage models, U.S. Geological Survey Open-File Report 2008-1155.
Skinner, B.J. 1979. The many origins of hydrothermal mineral deposits. Geochemistry of Hydrothermal Ore Deposits, 2nd ed., H.L. Barnes (Ed.), John Wiley and Sons, New York.
Sosson, M., Rolland, Y., Danelian, T., Muller, C., Melkonyan, R., Adamia, S., Galoyan, G. H. 2010. Subductions, obduction and collision in the Lesser Caucasus (Armenia, Azerbaijan, Georgia), new insights. In: M. Sosson, N. Kaymakci, R. Stephanson, F. Bergarat and V. Storatchenoko (Eds.). Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. Geological Society, London, Special Publications, 340, 329-352.
Soylu, M. 1999. Modeling of porphyry copper mineralization of the Eastern Pontides. Ph.D. thesis, Middle East Technical University, p. 127. Ankara (yayımlanmamış).
Şengör, A.M.C., Yılmaz, Y. 1981. Tethyan Evolution of Turkey: A Plate Tectonic Approach. Tectonophysics, 75, 181-241.
Taylor, R.P. 1981. Isotope geoloyg of the Bakırçay porphyry copper prospect, northern Turkey, Mineralium Deposita, v. 16, p. 375-390.
Topuz, G., Alther, R., Satır, M., Schwartz, W. H. 2004. Lowgrade metamorphic rocks from the Pulur complex, NE Turkey: implications for the pre-Liassic evolution of the Eastern Pontides. International Journal of Earth Sciences, 93, 72-91.
Topuz, G., Göçmengil, G., Rolland, Y., Çelik, Ö. F., Zack, T., Schmitt A. K. 2012, Jurassic accretionary complex and ophiolite from northeast Turkey: No evidence for the Cimmerian continental ribbon. Geology, 41, 255-258.
Topuz, G., Çelik, Ö. F., Şengör, A. M. C., Altıntaş, İ. E., Zack, T., Rolland, Y., Barth, M. 2013. Jurassic ophiolite formation and emplacement as backstop to a subduction-accretion complex in northeast Turkey, the Refahiye ophiolite, and relation to the Balkan ophiolites. American Journal of Science, 313, 1054-1087.
Ustaömer, T., Robertson, A. H. F. 2010. Late Paleozoic-Early Cenozoic tectonic development of the eastern Pontides (Artvin area), Turkey: stages of closure of Tethys along the southern margin of Eurasia. In: Sosson, M., Kaymakçı, N., Stephenson, R. A., Bergerat, F., Starostenko, V. (Eds.) Sedimentary Basin Tectonics from the Black Sea and Caucasus to the Arabian Platform. Geological Society, London, Special Publications, 340, 281-327.
Ustaömer, T., Robertson, A. H. F., Ustaömer, P. A., Gerdes, A., Peytcheva, I. 2012. Constraints on Variscan and Cimmerian magmatism and metamorphism in the Pontides (Yusufeli-Artvin area), NE Turkey from U-Pb dating and granite geochemistry. In: Robertson, A. H. F., Parlak, O., Ünlügenç, U. C. (Eds.) Geological Development of Anatolia and the Easternmost Mediterranean Region. Geological Society, London, Special Publications, 372. First Published online November 1, 2012, http://dx.doi.org/ 10.1144/SP372.13.
Waterman, G.C., Hamilton, R.L. 1975. The Sar Cheshmeh porphyry copper deposit, Economic Geology, v. 70, p. 568-576.
Xu, G. 1998. Geochemistry of sulphide minerals at Dugald River, NW Queensland, with reference to ore genesis. Mineral and Petrol., 63, 1-2, 119-139.
Xuexin, S. 1984. Minor elements and ore genesis of the Fankou Lead-Zinc deposit, China. Mineral. Deposita, 19, 95-104.
Yalçınalp, B. 1995. The geochemical characteristics of the granitoids bearing porphyry Cu-Mo mineralization in eastern Pontids. Türkiye Jeoloji Bülteni, 30/1, 25-32.
Yılmaz, H. 1985. Olur (Erzurum) yöresinin jeolojisi. Karadeniz Teknik Üniversitesi Yerbilimleri Dergisi, 4, 1-2, 23-41.
Yılmaz, Y., Tüysüz, O., Yiğitbaş, E., Genç, S. C., Şengör, A. M. C. 1997. Geology and tectonic evolution of the Pontides. In: Robinson, A. G. (Ed.) Regional and Petroleum Geology of the Black Sea and Surrounding Regions. American Association of Petroleum Geologists, Tulsa, OK, Memoirs, 68, 183-226.
Yılmaz, A., Adamia, S., Chabukiani, A., Chkhotua, T., Erdoğan, K., Tuzcu, S., Karabıyıkoğlu, M. F. 2000. Structural correlation of the southern Transcaucasus (Georgia)-eastern Pontides (Turkey). In: Bozkurt, E., Winchester, J. A., Piper, J. D. A. (Eds.) Tectonics and Magmatism in Turkey and the Surrounding Area. Geological Society of London, Special Publications, 173, 171-182.
Yiğit, Ö. 2006. Gold in Turkey-a missing link in Tethyan metallogeny. Ore Geology Reviews, 28, 147-179.
Yiğit, Ö. 2009. Mineral Deposits of Turkey in Relation to Tethyan Metallogeny: Implications for Future Mineral Exploration, Society of Economic Geologists, Inc. Economic Geology, v. 104, p. 19-51.