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REE GEOCHEMISTRY, MINERALOGY AND ORIGIN OF MANGANESE IN THE ARTOVA OPHIOLITE COMPLEX, YOZGAT (TURKEY)

Nursel Öksüz

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s01.130View metrics

Abstract

Artova ophiolite complex is located along the North western and east margin in Yozgat (Turkey). The Mn-deposits in the Derbent an d Eymir areas are part of this ophiolite complex. These deposits, both banded and lenticular forms, are hosted by radiolarite and are generally overlying volcanics. Braunite, jacopsite, psilomelane and goethite are main constituents of the manganese ores in Eymir (Sorgun-Yo zgat) and manyetite, manganite, pyrolusite and goethite are main constituents of the manganese ores in Derbent (Mahkeme hill-Yozgat ) areas. The gang mineral in Eymir is just quartz, whereas 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 both 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. The negative Eu anomaly shows contamination from the continental crust and/or sedime nt contribution via dehydration. Ce values in the Eymir mineralization were computed from the equation of Ce anom=log [3xCeN/(2xLaN+NdN)] and anomalies were found as Ce anom< -0.1 in 8 samples and Ceanom > - 0.1 in 12 samples, whereas th e same values in the Mahkeme Hill mineralization were computed and the anomalies were found as Ce anom< -0.1 in 9 samples and Ce anom > - 0.1 in 5 samples. These values are indicative of both oxic and anoxic sedimentation conditions. Chemica lly, the studied manganese deposits and associated radiolarite are very similar to these formed by hydrothermal – hydrogenous processes.

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Publication details

Title
REE GEOCHEMISTRY, MINERALOGY AND ORIGIN OF MANGANESE IN THE ARTOVA OPHIOLITE COMPLEX, YOZGAT (TURKEY)
Authors
Nursel Öksüz
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
hydrothermalhydrogenousophiolitegeochemistryYozgat (TURKEY) 11th International Multidisciplinary Scientific GeoConference SGEM2011 www.sgem.org International Multidisciplinary Scientific GeoConference SGEM 2011 222
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