A5037469620- Geological and Geochemical Analysis
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Mineralogy and Gemology Studies
- Metal Extraction and Bioleaching
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Plant Ecology and Soil Science
- Geological Studies and Exploration
- Metallurgy and Cultural Artifacts
- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Mineral Processing and Grinding
- Crystal Structures and Properties
- Clay minerals and soil interactions
Karadeniz Technical University
2002-2019
Different types of chromitite, including texturally massive, disseminated and banded varieties, are present in the Kop ophiolitic ultramafic rocks, which extend from Erzincan to Erzurum northeastern Turkey. The chemical composition chromian spinel these deposits is relatively homogeneous, with 0.64 2 O 3 FeO/MgO values range 0.71–1.12) chromitites precipitated very similar picritic basalt boninite, distinct contrast MORB-type magma. Total contents platinum-group elements (PGE) different 87...
The bulk composition (major and trace elements) the of minerals in peridotites Ortaca area, south-western Turkey, have been investigated to understand processes controlling lithological compositional variations dismembered mantle section, containing clinopyroxene-bearing harzburgite, harzburgite dunite. vary from almost fertile (1.92-2.42 wt\% Al2O3, 2.00-2.64\% CaO) with a lower Cr# spinel phase (<24) depleted dunite (0.17-1.60\% 0.32-1.71\% higher (31-76). Systematic major elements whole...
Mantle-hosted podiform chromitites from ophiolites of the Kahramanmaras area (south-eastern Turkey), have been investigated with ragard to chromite composition, Platinum-group elements (PGE) concentration and mineralogy, as well Os-isotope geochemistry. Chromitites vary Al-rich Cr-rich, however they indifferently display enrichment in Os-Ir-Ru over Rh-Pt-Pd, concentrations PGE lower than 510 ppb. Consistently, most abundant minerals (PGM) are Ru-Os-Ir sulfides alloys subordinate Ir-Ru-Rh...
Mantle tectonites from Eskisehir (NW-Turkey) include high-Cr chromitites with limited variation of Cr#, ranging 65 to 82. Mg# ratios are between 54 and 72 chromite grains contain up 3.71 wt% Fe2O3 0.30 TiO2. PGE contents variable range 109 533 pbb. Chondrite-normalized patterns flat Os Rh negatively sloping Pd. Total low Pd/Ir (from 0.07 0.41) consistent typical ophiolitic chromitites. Chromite a great number solid inclusions. They comprise mainly highly magnesian (Mg# 95-98) mafic silicates...
Late Cretaceous felsic rocks are common in the eastern Pontides (NE Turkey). These developed as an island arc from Jurassic to Miocene; they also host numerous volcanogenic massive sulfide deposits. The dacites that outcrop around Zigana Mountain (Gümüşhane, NE Turkey) were exposed intensive hydrothermal alteration. Widespread alteration of dacite has led formation well-developed clay minerals. Their main products sericite, chlorite, and carbonates (ankerite calcite). minerals identified by...
Abstract In the Pontides, mineralogically similar, calc-alkaline, zoned I-type granitoids were emplaced into a volcanic-arc environment during Late Cretaceous and Eocene. The contain an equilibrium assemblage of quartz, plagioclase, K-feldspar, hornblende, biotite, pyroxene, magnetite, ilmenite. Large hornblende crystals (1-3 mm) are magnesiohornblende. average magnesium number is 0.74; Si cation contents range between 6.64 7.32; Altot 0.86. most common substitution in pargasitic. exchange...
Eski bir magmatik yayı olan Doğu Karadeniz Bölgesi (Pontidler) Sakarya Zonu içinde yer alan andezit ve porfirik dasit daykları Geç Kretase yaşlı volkanitleri kesmektedir. Andezit doku sergilemektedir. Andezitler başlıca plajiyoklas ojit minerallerinden ibaret olup, plajiyoklaslar elek dokusu polisentetik ikizlenme göstermektedir. Ojit minerallerinin kenar kısımlarında opak mineral oluşumları yaygındır. Porfirik dasitler ise kuvars, plajiyoklas, amfibol biyotit oluşmakta kuvars kristallerinin...
Iron (Fe)-skarn mineralizations (Çambaşı, Dereli, Eğrikar, Karadağ, Kopuz, Sekü, Donguldere, Arnastal, Özdil, Ögene, İkizdere, Ovit Dağı, Kartiba, etc.) in the eastern part of Pontides (NE Türkiye) are accommodated Pontide paleomagmatic arc and Metallogenic Belt containing numerous various deposits. Fe-skarn mineralization around Arnastal Plateau (Gümüşhane-Türkiye) is fragmentary this area, which covered with plants (grasses, flowers, etc.). Thus, it was attempted to describe subsurface...