IMPLlCATlONS ON GEOLOGY, GENESIS AND ORlGlN OF ÇAYIRLI MANGANESE DEPOSIT, ANKARA, CENTRAL ANATOLIA

Yıl 1990, Cilt: 110 Sayı: 110, 28 - 28, 01.03.1990

Vedat Oygür

Öz

Çayırlı manganese deposit occurs in radiolarite related to Ankara ophiolitic melangc of Lovver Cretaceous-Uppcr
Cenonian age. The ore hody consistent with the hoşt rock is locatcd in the minör folds within this unit. The ore minerals are
pyrolusitc and psilomelanc. Regarding the chcmical composition of the ore, it appears that the ore is Mn-rinc (Fe/Mn <0.1 ) and
rescmbles to the deposits precipitated rapidly from the hot aqueous solutions near the submarine hydrothermal sources.The barium
content of the deposit is higher than that of the normal seawater. In addition, the concentrations of the elements such as Ni, Co
and Cu are lovver than that of the present-day hydrogenous manganese deposits. According to these data, it might be suggcsted
that Çayırlı manganese deposit is formed by the hydrothermal convection processes at the seafloor spreading centers.

Anahtar Kelimeler

IMPLlCATlONS, GEOLOGY, GENESIS

IMPLlCATlONS ON GEOLOGY, GENESIS AND ORlGlN OF ÇAYIRLI MANGANESE DEPOSIT, ANKARA, CENTRAL ANATOLIA

Öz

Çayırlı manganese deposit occurs in radiolarite related to Ankara ophiolitic melangc of Lovver Cretaceous-Uppcr Cenonian age. The ore hody consistent with the hoşt rock is locatcd in the minör folds within this unit. The ore minerals are pyrolusitc and psilomelanc. Regarding the chcmical composition of the ore, it appears that the ore is Mn-rinc (Fe/Mn <0.1 ) and rescmbles to the deposits precipitated rapidly from the hot aqueous solutions near the submarine hydrothermal sources.The barium content of the deposit is higher than that of the normal seawater. In addition, the concentrations of the elements such as Ni, Co and Cu are lovver than that of the present-day hydrogenous manganese deposits. According to these data, it might be suggcsted that Çayırlı manganese deposit is formed by the hydrothermal convection processes at the seafloor spreading centers.

Anahtar Kelimeler

IMPLlCATlONS, GEOLOGY, GENESIS

Kaynakça

• Bailey, E.B. ve McCallien, W.C., 1950, Ankara melanjı ve Anadolu şariyajı: MTA Mecm., 40, 12-22, Ankara.
• Barutoğlu, Ö.H., 1954, Ankara-Haymana kazası Çayırlı köyü manganez yatağı hakkında kısa not: MTA Rap., 2174 (yayımlanmamış), Ankara.
• — , 1962, Ankara-Çayırlı manganez yatağı: Madencilik Derg., 2(6), 349-356.
• Batman, B., 1978, Haymana kuzeyinin jeolojik evrimi ve yöredeki melanjın incelenmesi: Stratigrafi birimleri: HÜ Yerbilimleri Derg., 4(1-2), 95-124.
• — , 1981, Ofiyolitli melanjın (Dereköy formasyonu) Haymana kuzeyindeki yörede (SW Ankara) incelenmesi: HÜ Yerbilimleri Derg., 8,61-70.
• Beycan, N., 1969, Çayırlı köyü-Haymana düşük tenörlü manganez cevherlerinin zenginleştirilmesi etüdü: MTA Rap., 4075 (yayımlanmamış), Ankara.
• Bignell, R.D.; Cronan, D.S. ve Tooms, J.W., 1976, Metal dispersion in the Red Sea as an aid to marine geochemical exploration : Trans. Inst.Min.Met., 85, B274-278.
• Bischoff, J.L. ve Rosenbauer, R.J., 1977, Recent metalliferous sediments in the North Pacific manganese nodule area : Earth Planet.Sci.Lett., 33, 379-388.
• Bonatti, E., 1978, The origin of metal deposits in the oceanic lithosphere: Sci.American, 238 (2), 54-61.
• — , 1984, Hydrothermal metal deposits from the oceanic rifts: A dassification: Rona, PA. ve diğerleri, ed.. Hydrothermal Processes at Seafloor Spreading Centers da., Nato Conf.Ser., Ser.IV: Marine Sciences, 12, 491-502.
• — ; Fisher, D.E.; Joensuu, O.; Rydell, H.S. ve Beyth, M., 1972, Iron-manganese-barium deposit from the Northern Afar Rift (Ethiopia):Econ.Geol., 67, 717-730.
• — ; Zerbi, M.; Kay, R. ve Rydell, H.S., 1976, Metalliferous deposits from the Apennine ophiolites: Mesozoic equivalents of modern deposits from oceanic spreading centers: Geol.Soc.America Bull., 87, 83-94.
• ı Bostrom, K., 1970, Submarine volcanism as a source for iron: Earth Planet, Sci.Lett., 9, 348-354.
• — , 1983, Genesis of ferromanganese deposits-Diagnostic Criteria for recent and old deposits: Rona, PA. ve diğerleri, ed., Hydrothermal Processes at Seafloor Spreading Centers da, Nato Conf.Ser., Ser.IV: Marine Sciences, 12, 473-489.
• Crerar, D.A.; Namson, J.; Chyi, M.S.; Wİlliams, L. ve Feigenson, M.D., 1982, Manganiferous cherts of the Fransiscan assemblage: I.General geology, ancient and modern analogues, and implications for hydrothermal convection at oceanic spreading centers: Econ.Geol., 77, 519-540.
• Cronan, D.S., 1980, Metallogenesis at oceanic spreading centers: J.Geol.Soc.London, 137, 369-371.
• Erk, S., 1956, Ankara bölgesinin petrol ihtimalleri: MTA Rap., 2608 (yayımlanmamış), Ankara.
• Erol, O., 1954, Ankara ve civarının jeolojisi hakkında rapor (Kızılcahamam güneyi; Ankara, Haymana, Balâ, Kırıkkale, Çubuk çevresi, Keskin kuzeyi): MTA Rap., 2491 (yayımlanmamış), Ankara.
• Guillemot, D. ve Nesteroff, W.D., 1980, Les depots metalliferes de Chypre: comparaison, avec leur homologues actuels du Pacifique: Panayiotou, A., ed., Ophiolites da., Proc.Inter.Ophiolite Symp. Cyprus, 1979, 139-146.
• Helke, A., 1955, Beobachtungen an Türkischen minerallagerstaten: N Jb.Min.Abh., 88/1, 55-132.
• Karaege, E., 1965, Ankara ili, Haymana ilçesi İkizce nahiyesi, Oyaca köyü AR—2631 sayısı ruhsat sahası prospeksiyon raporu : MTA Maden Etüt Dai.Rap., M-35 (yayımlanmamış), Ankara.
• Kılıç, M., 1972, Ankara-Haymana-Çayırlı köyü manganez yatağı jeoloji raporu: MTA Maden Etüt Dai.Rap., M-152 (yayımlanmamış), Ankara.
• — , 1977, Ankara-Haymana AR—4351, İR—472 no.lı manganez ve AR—2631 no.lı demir madeni sahalarının ön etüt raporu: MTA Maden Etüt Dai.Rap., M—304 (yayımlanmamış), Ankara.
• ı Krauskopf, K.B., 1957, Separation of manganese from iron in Sedimentary processes: Geochim.Cosmochim. Acta, 12, 61-84.
• Lokman, K. ve Lahn, E., 1946, Haymana bölgesinin jeolojisi: MTA Mecm., 2/36, 293-299, Ankara.
• Norman, T., 1975, Ankara Melanjı'nın yapısı hakkında: Cumhuriyetin 50.Yılı Yerbilimleri Kong. 1973, 77-94, Ankara.
• — , 1985, The role of the Ankara Melange in the development of Anatolia (Turkey): Dixon, J.E. ve Robertson, A.H.F., ed., The Geological Evolution of the Eastem Mediterranean de., Geol.Soc.Spec.Publ., 17, 441-447.
• Oygür, V.; Erkan, N. ve Sanlı, D.Y., 1981, Ankara-Haymana-Çayırlı manganez madeni jeoloji raporu: MTA Rap., 6962 (yayımlanmamış), Ankara.
• Özkaya, İ., 1981, Fethiye, Ankara ve Hakkari yöresinde üç kesit ve melanj üzerine gözlemler : TJK 35.Bil.Tekn.Kurultayı, Bildiri özleri, Ankara.
• Özkoçak, O., 1970, Çayırlı Manganez yatağı (Haymana-Ankara): MTA Rap., 4694 (yayımlanmamış), Ankara.
• Panagos, A.G. ve Varnavas, S.P., 1984, On the genesis of some manganese deposits from eastern Greece: Wauschkuhn, A. ve diğerleri, ed., Syngenesis and Epigenesis in the Formation of Mineral Deposits de., Springer-Verlag, 552-561.
• Pekkan, A., 1953, Türkiye'de tetkik edilen bazı manganez yataklarının teşekkülleri hakkında notlar: TJK Bült., IV (1), 122-131.
• Rona, PA., 1982, Polymetallic sulfides at seafloor spreading centers: A global overvievv: Marine Techn.Soc.Jour., 16, 81-86.
• — , 1984, Hydrothermal mineralization at seafloor spreading centers: Earth Sci.Rev., 20, 1-104.
• Seymen, İ., 1985, Kırşehir Masifi metamorfitlerinin jeoloji evrimi: Ketin Simpozyumunda, Türkiye Jeol.Kur., 133-148.
• Ünalan, G., 1981, Ankara güneybatısındaki "Ankara Melanjı'nın stratigrafisi: İç Anadolu'nun Jeolojisi Simpozyumunda, TJK 35.Bil.Tekn.Kur., 46-52, Ankara.
• — ; Yüksel, V.; Tekeli, T.; Gönenç, O.; Seyirt, Z. ve Hüseyin, S., 1976, Haymana-Polatlı yöresinin (güneybatı Ankara) Üst Kretase-Alt Tersiyer stratigrafisi ve paleocoğrafik evrimi: TJK Bült., 19 (2), 159-176.