Preliminary results of the radiolarian-chert hosted manganese deposit within the Vezirler ophiolitic mélange (Kula-Manisa, western Turkey): constraints on the origin, paleo-redox conditions, and depositional environments
| Autor: | Güven Kiliç, Mustafa Kumral, M. Selman Aydoğan |
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| Rok vydání: | 2018 |
| Předmět: |
Pillow lava
010504 meteorology & atmospheric sciences Geochemistry Braunite 010502 geochemistry & geophysics Ophiolite 01 natural sciences Cretaceous Sedimentary depositional environment Petrography Radiolarite Oceanic crust General Earth and Planetary Sciences Geology 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Arabian Journal of Geosciences. 11 |
| ISSN: | 1866-7538 1866-7511 |
| DOI: | 10.1007/s12517-018-3984-6 |
| Popis: | In Turkey, Late Cretaceous ophiolitic complexes and melange assemblages of the Izmir-Ankara-Erzincan Suture Zone, part of the northern branch of the Neotethys Ocean are rich in Mn-oxide deposits. These deposits are related to the red-violet radiolarian-chert blocks within the melange units. Of these, the Vezirler Melange, consisting of pelagic limestone, pillow basalt, radiolarite blocks, and highly altered serpentinite are distributed in the northern part of the Kula (Manisa) region, western Turkey. Here, the Mn-oxide deposit occurs as interlayers and, to a lesser degree in sharp contact with the radiolarian-chert-basalt-mudstone associations, and are highly folded and fractured. Based on XRD and petrographic studies, mineral paragenesis of the Mn-ores consists predominantly of braunite, pyrolusite, pysilomelane, quartz, and calcite. Geochemically, Mn-ores have high Ba (mean 10,854 ppm) and Sr (mean 4491 ppm) and low contents of Co ( 7) and low Co/Ni ( |
| Databáze: | OpenAIRE |
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