DISCUSSION ON THE ORIGIN OF OTLUKİLİSE IRON DEPOSIT GÜRÜN-SİVAS

 In this study, the geological aspects of Otlukilise iron deposit near Gürün (Sivas, Turkey) is investigated and possible mechanicms responsible for the formation of that deposit are discussed. Otlukilise iron occurrences are located in volcanosedimentary levels in Yanıktepe and Akdere formations which are age of Upper Cretaceous and Paleocene, respectively. The occurrence of Otlukilise iron formations is belived to have taken place as enrichments by secondary processes from siderite ores volcanosedimentary origin in relation with volcanic intercalations. Studies carried out on iron rich massive ores indicate an old formation in a sedimentary basin that represented by cumulative supplements of iron and associated elements which are directly on indirectly leached from serpentinites by submarine volcanites spreading out into an environment of carbonate deposition and hydrothermal exhalative fluxes and associated silicate phases formed by intensive silica rich fluids of hydrothermal origin and sulphide phases resulted from reactions of seewater and the same submarine volcanites. Sequential conjugateness observed especially among quartz and siderite, clay and/or clay bearing siderite layers in iron poor conglomerate breccia ore samples and estimations realized by certain mathematical rules indicate a sedimentary relationship prior to deformation. Both massive ores and fragments are deposited by the processes during formation of an ore horizon intercalated by clay and quartz rich levels and/or just after the movements at the bottom of the basin. Thus, Otlukilise iron deposits represent an other sample of Lahn-Dill type syn-sedimentary volcanogenic or exhalative-sedimentary type ore formation as Deveci Iron Deposits (Hekimhan-Malatya, Turkey) do. 
Keywords:

-,

___

  • Gülibrahimoğlu, İ. 1979, Sivas - Gürün - Otlukilise demir yatağının jeolojisi ve sondajları: M.T.A. Gen. Müd., Derleme Rapor No: 6613 (Unpublished).
  • Gümüş, A., 1962, 1961 yılı çalışmaları neticesine gore Sivas İli, Kangal ve Gürün ilçeleri dahilinde teklif edilen demir eksplorasyon programı (Pınargözü, Davutoğlu, Elkondu, Otlukilise): M.T.A. Gen. Müd., Derleme Rapor No: 3371 (Unpublished).
  • ; 1964, Otlukilise (Sivas - Gürün) Demir Yatağı (55 / 334 ruhsat no'lu) hakkında nihai jeolojik rapor: M.T.A. Gen., Müd. Derleme Rapor No: 3376 (Unpublished).
  • Kormalı, R., 1972, Sivas İli Gürün ilçesi Otlukilise Demir Madeni çevresinin 1/10.000 ölçekli jeoloji raporu: M.T.A. Gen. Müd., Derleme Rapor No: 1901 (Unpublished).
  • Kozlu, H., Günay, Y., Dercourt, P., Cross, P., Cross, P. and Bellier, J.P., 1990, Doğu Toros bölgesinde, Neo - Tetis'in konumu: Turkiye 8. Petrol Kong., 387 - 403.
  • Kurtman, F., 1978, Gürün Bölgesinin jeolojisi ve tektonik özellikleri: Maden Tetkik ve Arama Derg., 91, 1 - 12.
  • Laznicka, P., 1985, Empirical Metallogeny: Developments in Economic Geology, 19, 1758 s., Elsevier, Amsterdam.
  • Lehmann, E., 1972, On the source of the iron in the Lahn ore deposits: Mineral. Deposita, 7, 247-270.
  • Metin, S., 1982, Doğu Toroslarda Derebaşı (Develi), Armutalan ve Gedikli (Saimbeyli) köyleri arasının Jeolojisi: İ.Ü. Müh. Fak., Jeo. Müh. Bölümü, Doktora tezi, 134 s.; (Unpublished), Istanbul.
  • ; Ayhan, A. and Papak, İ., 1986, 1/100 000 ölçekli açınsama nitelikli Türkiye Jeolojik Haritalan Serisi: Elbistan I - 22 paftası, M.T.A. Yayınları.
  • ; ; - ; 1987, Doğu Torosların batı kesiminin jeolojisi (GGD TÜRKİYE): Maden Tetkik ve Arama Derg., 107, 1-12.
  • Norrish, K. and Chappel, B.W., 1977, X - ray fluo- rescence spectrometry: Zussman, J., (ed.), Physical Methods in Determinative Mineralogy, 2nd ed. Academic Press, 201 - 272, London.
  • Özer, S., Terlemez, İ., Sümengen, M. and Erkan, E., 1984, Pınarbaşı (Kayseri) çevresindeki allokton birimlerin stratigrafisi ve yapısal konumları: Türkiye Jeol. Kur. Bült, 27, 61- 69.
  • Özgül, N., 1976, Torosların bazı temel jeoloji özel- likleri: Türkiye Jeol. Kur. Bült., 19 (1), 65 - 78.
  • ; Metin, S., Göğer, E., Bingöl, İ, Baydar, O. and Erdoğan, B., 1973, Tufanbeyli dolayının Kambriyen ve Tersiyer kayaları: Türkiye Jeol. Kur. Bült, 16 (1), 82-100.
  • Quade, H., 1970, Der Bildungsraum und die genetische Problematik der vulkono - sedi- mentaren Eisenerze: Clausthaler Hefte, Heft 9, 27 - 65, Berlin.
  • ; 1976, Genetic problems and environmental features of volcano-sedimentary iron-ore deposits of the Lahn - Dill - Type: Wafl, K.H., ed., Handbook of Strata - Bound and Stratiform Ore Deposits, 255 - 294.
  • Stendal, H., Ünlü, T. And Konnerup - Madsen, J., 1995, Geological setting of iron deposits of Hekimhan Province, Malatya, central Anatolia, Turkey: Trans: Instn. Min. Metall. (sect. B. Appl. Earth sci.), 104, 46 - 54, London.
  • Unlu, T., 1983, Die Genesse der Siderit Lagerstatte Deveci in der Hekimhan - Provinz Malatya/Turkei und ihre wirtschafftliche Bewertung: Doktora gahsmasi, Berlin Teknik Üniversitesi, 84 s., Berlin.
  • ; and Stendal, H., 1986, Divriği Bölgesi demir yataklarının element korelasyonu ve jeokimyası (Orta Anadolu - Türkiye): Jeoloji Mühendisliği, 28, 5 -19.
  • -----,-;demir cevheri yataklarının nadir toprak element (REE) jeokimyası. Orta Anadolu, Türkiye: Türkiye Jeol.Kur. Bull., 32 (1-2), 21-38.