Mineralogy and geochemistry of metalliferous sedimentary rocks from the Upper  Cretaceous VMS deposits of the Eastern Pontides (NE Turkey)

Mustafa Kemal REVAN; Yurdal GENÇ; Okan DELİBAŞ; Valeriy V MASLENNIKOV; Nuriya R AYUPOVA; Okan ZİMİTOĞLU

Makale detayları

Mineralogy and geochemistry of metalliferous sedimentary rocks from the Upper Cretaceous VMS deposits of the Eastern Pontides (NE Turkey)

Yazarlar:

Mustafa Kemal REVAN | Yurdal GENÇ | Okan DELİBAŞ | Valeriy V MASLENNIKOV | Nuriya R AYUPOVA | Okan ZİMİTOĞLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2019 Vol.28 Issue 2, pp.299-327

Belge Tipi:

Makale

Yayın Tarihi:

3/2019

Belge Dili:

Türkçe

Document ID (Org No.):

2000731093

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

Metalliferous sedimentary rocks, despite being limited in scope, are important stratigraphic horizons within the volcanogenic  massive sulfide (VMS) deposits in the Upper Cretaceous volcanic belt of the Eastern Pontides. The metalliferous sedimentary rocks  compose a distinctive genetic class. The abundance of such rocks in the Eastern Pontide district provides a basis for study and description  that may be more widely applied in other VMS districts. The metalliferous sedimentary rocks generally form layers less than 1.5 m thick  above stratiform massive sulfide ores. The metalliferous sediments are largely composed of quartz and hematite. While the Si ± Fe  content of sediments directly overlying the stratiform massive sulfide ores is high, an increase in the amount of carbonate is observed in  sediments that are not directly overlying the ores. The metalliferous sedimentary rocks were formed by the mixing of mainly chemical  components and to a smaller degree detrital components in various proportions due to sedimentation processes occurring on the  seafloor. Of the major constituents of the metalliferous sediments, Si, Fe, Cu, Zn, Pb, Sb, and Au generally have a hydrothermal origin,  whereas Al, Zr, and Ti are from detrital volcanic and volcaniclastic components. The high levels of U and V indicate a seawater origin,  pointing to a submarine environment for the formation of the Eastern Pontide metalliferous sedimentary rocks. The composition of the  metalliferous sediments of Eastern Pontide VMS deposits implies that these sediments carry a continental-arc provenance signature.  Silica (±iron)-rich rocks in the Eastern Pontides can be used as guide horizons in exploring for volcanogenic massive sulfide deposits  in the district since they formed close to the sulfide ores and their areal extents are much greater than those of the sulfide ores. In  comparison with their analogues on a global scale, these rocks are broadly comparable to silica- and iron-rich sedimentary rocks in the  VMS-bearing districts of the Urals.

Makale detayları

Mineralogy and geochemistry of metalliferous sedimentary rocks from the Upper Cretaceous VMS deposits of the Eastern Pontides (NE Turkey)

Yazarlar: Mustafa Kemal REVAN | Yurdal GENÇ | Okan DELİBAŞ | Valeriy V MASLENNIKOV | Nuriya R AYUPOVA | Okan ZİMİTOĞLU

Yayıncı: TUBITAK

Dergi: Turkish Journal of Earth Sciences 2019 Vol.28 Issue 2, pp.299-327

Belge Tipi: Makale

Yayın Tarihi: 3/2019

Belge Dili: Türkçe

Document ID (Org No.): 2000731093

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

Mustafa Kemal REVAN | Yurdal GENÇ | Okan DELİBAŞ | Valeriy V MASLENNIKOV | Nuriya R AYUPOVA | Okan ZİMİTOĞLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2019 Vol.28 Issue 2, pp.299-327

Belge Tipi:

Makale

Yayın Tarihi:

3/2019

Belge Dili:

Türkçe

Document ID (Org No.):

2000731093

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985