Osman KOPTAGEL, Ulvi Ulusoy & Anthony E. FALLICK

Yahyalı Bölgesindeki Karbonat Yan Kayaçlı Pb-Zn Yataklarının Kükürt ve Kurşun İzotopu İncelemeleri, Kayseri, Güney Türkiye

Yahyal› yöresinde (Toros Kufla¤›) çok say›da karbonat-yankayaçl› Pb-Zn yata¤› yer almaktad›r. Galenit yataklarda en bol bulunan sülfür mineralidir. Göynük, Celalda¤› Desandre, Demircilik, Tekke, Havadan ve Suçat› yataklar›ndaki galenitlerin δ34S‰ ortalamalar›, s›ras›yla +0.2±0.5, +9.3±0.8, +10.7±1.3, +10.8±1.3, +11.5±2.4, –4.2±0.4 bulunmufltur. Bunlardan 206Pb/204Pb, 207Pb/204Pb ve 208Pb/204Pb oranlar› araflt›r›lan yataklar›n ortalamalar› Göynük için 18.968±0.005, 15.741±0.005 ve 39.074±0.016; Celalda¤› Desandre için 18.702±0.006, 15.715±0.006 ve 38.883±0.021; Demircilik için 18.618±0.020, 15.727±0.008 ve 38.852±0.032; Suçat› içinse 18.808±0.017, 15.751±0.028 ve 38.983±0.166 d›r. Kükürt izotoplar› incelemeleri, Göynük ve Suçat› yataklar›ndaki kükürdün farkl› kaynaklardan türemifl kükürt izotoplar›n›n kar›fl›m ürünü, di¤erlerinin ise deniz suyu kökenli oldu¤unu göstermektedir. Galenitlerdeki Pb izotop oran de¤erlerinin da¤›l›m› her bir yatak için homojen bir kümeleflme sunarken, radyojenik kurflun zenginleflmesi bak›m›ndan bir çizgisellik göstermemektedir.

Anahtar Kelimeler:

kükürt izotopları, kurflun izotopları, karbonat yankayaçl› Pb-Zn yatakları, Türkiye

Sulfur and Lead Isotope Investigations of the Carbonate-Hosted Pb-Zn Deposits in the Yahyalı Region, Kayseri, Southern Turkey

Carbonate-hosted Pb-Zn deposits are common in the Yahyalı region (Taurus Belt) with galena the most abundant sulfide mineral. The mean d34S values for Göynük, Celaldağı Desandre, Demircilik, Tekke, Havadan and Suçatı deposits were +0.2±0.5, +9.3±0.8, +10.7±1.3, +10.8±1.3, +11.5±2.4, -4.2±0.4%o, respectively. The mean 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb measurements for the studied deposits were 18.968±0.005, 15.741±0.005 and 39.074±0.016 for Göynük, 18.702±0.006, 15.715±0.006 and 38.883±0.021 for Celaldağı Desandre, 18.618±0.020, 15.727±0.008 and 38.852±0.032 for Demircilik, 18.808±0.017, 15.751±0.028 and 38.983±0.166 for Suçatı. The sulfur isotope systematics imply that sulfur originated from a mixture of different sources for the Göynük and Suçatı deposits, but was probably derived from seawater for the others. The distribution of lead isotopic ratios had a well-defined cluster for each deposit, but no linear trend defining enrichment in radiogenic lead.

Keywords:

sulfur isotopes, lead isotopes, carbonate-hosted Pb-Zn deposits, Turkey,

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