REE Geochemistry, Mineralogy and Origin of Manganese Mineralization in the Derbent (Mahkeme Hill), Yozgat (TURKEY)


Öksüz N. , Yurteri C.

Goldschmidt 2011 Conference, Praha, Czech Republic, 11 - 19 August 2011, pp.1566-1568

  • Publication Type: Conference Paper / Summary Text
  • City: Praha
  • Country: Czech Republic
  • Page Numbers: pp.1566-1568

Abstract

Artova ophiolite complex is located along the North western and east margin in Yozgat (Turkey). The Mn-deposits in the Derbent area is part of this ophiolite complex. This deposit banded and lenticular forms, is hosted by radiolarite and is generally overlying volcanics.  Manyetite, manganite, pyrolusite and goethite are main constituents of the manganese ores in Mahkeme Hill (Derbent-Yozgat) area. The gang minerals in Derbent are quartz and calcite. In chondrite normalized REE graphics samples are characterized by highly negative and positive Ce anomalies  in area. Europium shows negative anomaly in all samples. The negative Ce anomaly is typical to submarine hydrothermal deposits and positive Ce anomaly is indicative of hydrogenous deposits [1, 2]. The negative Eu anomaly shows contamination from the continental crust and/or sediment contribution via dehydration [3]. Ce values in the Mahkeme Hill mineralization were computed and the anomalies were found as Ceanom< -0.1 in 9 samples and Ceanom > - 0.1 in 5 samples. These values are indicative of both oxic and anoxic sedimentation conditions. Chemically, the studied manganese deposit and associated radiolarite are very similar to these formed by hydrothermal – hydrogenous  processes [5]