Geology and mineralogy of Late Miocene clayey sediments in the southeastern part of the Central Anatolian Volcanic Province, Turkey

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dc.contributor.authorGuerel, Ali
dc.contributor.authorKadir, Selahattin
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2008
dc.departmentNiğde ÖHÜ
dc.description.abstractLate Miocene clayey sediments were deposited in lake-margin and shallow-lake environments of the southeastern Central Anatolian Volcanic Province (CAVP). Yellow to red mudstone, alternating with thin beds of conglomerate and sandstone in the Mustafapasa Formation, is overlain by altered white Cemilkoy ignimbrite. Grain size fines upward in each sequence (conglomerate, sandstone, and mudstone). The occurrence of reddish coloration upward, ripple marks, desiccation cracks, plant rootlets and remnants, and the development of initial-stage paleosols in association with smectite reveal that the area underwent alternating periods of siliciclastic and volcaniclastic sediment Supply (wet) and drying, Micromorphologically, the development of spongy smectite in mudstone of the Mustafapasa Formation and vermiform kaolinite in the Cemilkoy ignimbrite on resorbed detrital feldspar and devitrified glass reveals in situ precipitation driven by dissolution and precipitation mechanisms. In addition, alteration of these sediments may have resulted in the depletion of soluble alkaline elements, such as Ca, Na, and K, from the ignimbrite downward into the Mustafapasa Formation. Alternatively, the leaching of these elements - due to the hydrologically open system of the lake environment - may have resulted in the enhancement of Al+Fe/Si-favored precipitation of kaolinite in an acidic environmental condition, namely, of the altered Cemilkoy ignimbrite at the top of the profile of the Mustafapasa Formation, and of smectite in an alkaline setting within lower-level sediments where carbonate minerals were lacking. The coexistence of smectite with accessory illite indicates that illitization occurred via release of K and Al during excess desorption of feldspar. Large Ni and Co values in mudstone samples, and Fe oxidized and partly chloritized pyroxene and hornblende, indicate that the basin was also affected by ophiolite-related supply.
dc.identifier.doi10.1346/CCMN.2008.0560302
dc.identifier.endpage321
dc.identifier.issn0009-8604
dc.identifier.issue3
dc.identifier.scopus2-s2.0-49649089302
dc.identifier.scopusqualityQ2
dc.identifier.startpage307
dc.identifier.urihttps://dx.doi.org/10.1346/CCMN.2008.0560302
dc.identifier.urihttps://hdl.handle.net/11480/5237
dc.identifier.volume56
dc.identifier.wosWOS:000258023600002
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherCLAY MINERALS SOC
dc.relation.ispartofCLAYS AND CLAY MINERALS
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCentral Anatolian Volcanic Province
dc.subjectgrain size
dc.subjecthydrologically open lake system
dc.subjectkaolinite
dc.subjectpaleoenvironment
dc.subjectsmectite
dc.titleGeology and mineralogy of Late Miocene clayey sediments in the southeastern part of the Central Anatolian Volcanic Province, Turkey
dc.typeArticle

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