S and Pb Isotope Geochemistry of the carbonate-hosted Au-Ag-Zn ± Pb deposits in the Maden Village (Ulukışla-Niğde), Central Taurides, South Turkey
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Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
E. Schweizerbart'sche Verlagsbuchhandlung
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
The Maden Village carbonate-hosted Au-Ag-Zn ± Pb deposits in the Bolkar Mountains that are part of the Tau- ride platform, south of Turkey, contain significant none- sulfide ore and relicts of sulfide bodies. The deposits hosted in the Upper Triassic carbonate rocks of the Bolkar Mountains are controlled by E-W trending and 36-45° S-dipping faults, and karst- related structures. The deposits is a formed by supergene oxidation of primary sulfide minerals during complex interaction of tectonic uplift, karst development, changes in the level of the water table and weathering. Zn (Pb) carbonates, Zn-hydrosilicates and associated hydrated phases directly replace the primary ore bodies or fill cavities and pods along fractures within marble are genetically related to the uplift of Tauride block during Oligo-Miocene period. The supergene deposits recharacterized by open space and karst-filling feature. Direct replacement of primary sulphide is accompanied by distal precipitation of non-sulphide minerals in cavities. The mineralogy of non-sulfide minerals consist of cerussite, anglesite, smithsonite, limonite, pyrolusite, psilomelane, manganite, chalcophanite, beudantite, goethite, lepidocrocite, hemimorphite, mimetite, corkite and native gold. In the sulfide ore bodies of Maden Village deposits, the ? 34 S isotope values of galena vary from 3.0 to 5.8 ‰ V-CDT and imply that sulphur originated from a mixture of different sources (me- teoric, magmatic hydrothermal fluids). The lead isotope data for galena showed mean values of 18.991, 15.701, and 39.056 for 206 Pb/ 204 Pb, 207 Pb/ 204 Pb, and 208 Pb/ 204 Pb, respectively. The distribution of the lead isotope ratios shows a cluster in the deposit that is related to the upper crust. The fluid inclusions in sphalerite show that the homogenization temperatures val- ues of up to 290 °C, at a salinity of 6.2 wt.% NaCl equiv. In this study, we propose that ore forming fluids were originally derived magmatic hydrothermal fluids, and that they were mixed with low salinity meteoric water. The re-modified sulfide Pb-Zn mineralization resembles a 'residual and karst fill' sub type of nonsulphide zinc deposits. Au and Ag bearing miner- als in the supergene environment consist of native gold hosted in limonite and Ag-bearing cerussite and anglesite.
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Açıklama
*Kahyan, Asuman ( Aksaray, Yazar ) *Yıldız, Mustafa ( Aksaray, Yazar )
Anahtar Kelimeler
Sulfur-lead Isotope, Carbonate-Hosted, Au-Ag- Zn ± Pb Deposits, None-sulfide Ore, Ulukışla, Turkey
Kaynak
Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
196
Sayı
1
