Geology, mineralogy, and geochemistry of late Miocene paleosol and calcrete in the western part of the Central Anatolian Volcanic Province (CAVP), Turkey

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dc.contributor.authorGurel, Ali
dc.date.accessioned2024-11-07T13:25:00Z
dc.date.available2024-11-07T13:25:00Z
dc.date.issued2017
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractThe late Miocene was characterized by high global temperatures and partly to nearly complete desiccation of the Mediterranean Sea throughout the latter part of the Messinian age (the Messinian salinity crisis). The non-marine paleoenvironmental and paleoclimatic records from the Mediterranean area are highly limited in their spatial range. Late Miocene river flood-plain sediments in the Central Anatolian Volcanic Province (CAVP) of central Turkey consist of siliciclastic and pyroclastic sediments with paleosols and calcrete. Five lithofacies were identified as (A) massive conglomerate, (B) trough-cross-bedded sandstone, (C) massive mudstone, (D) disrupted mud, (E) and disrupted matrix-supported conglomerate. The paleosols were composed predominantly of smectite and illite with smaller amounts of feldspar, quartz, opal-A, pyroxene and amphibole, and the calcretes were composed mainly of calcite, with smaller amounts of feldspar, quartz and opal-A, and minor amounts of smectite, chlorite and illite. Authigenic clay minerals and micritic calcite coating on the detrital grains and soil peds and pendant cement in the calcrete and paleosol horizons were evidence of a vadose zone. In contrast, the large equant spar drusy mosaics were formed in phreatic environments. The weathering of ignimbrite and marble led to the depletion of SiO2, CaO, Al2O3, Fe2O3, TiO2, and K2O through the precipitation of smectite and illite in the paleosols, and CaO in the form of micrite and calcite in the calcrete horizons. Field observations, mineralogy, geochemistry and the results of delta O-18 and delta C-13 isotopic analysis reveal that alternating wet and dry periods resulted in an upward increase in precipitation of authigenic smectite and illite within the late Miocene sections, under the influence of geochemical and pH fluctuations in phreatic or vadose water within the river flood-plain paleoenvironment.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [104Y070]
dc.description.sponsorshipAuthor sincerely thanks Prof. Dr. Elizabeth Gierlowski-Kordesch (Department of Geological Sciences, Ohio University, USA) for her help in developing this manuscript and recommendations. This study was financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK) within the framework of Project No. 104Y070.
dc.identifier.doi10.1016/j.geoderma.2017.04.016
dc.identifier.endpage38
dc.identifier.issn0016-7061
dc.identifier.issn1872-6259
dc.identifier.scopus2-s2.0-85018244209
dc.identifier.scopusqualityQ1
dc.identifier.startpage22
dc.identifier.urihttps://doi.org/10.1016/j.geoderma.2017.04.016
dc.identifier.urihttps://hdl.handle.net/11480/14457
dc.identifier.volume302
dc.identifier.wosWOS:000403522800004
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofGeoderma
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241106
dc.subjectCentral Anatolian Volcanic Province (CAVP)
dc.subjectPaleosol
dc.subjectCalcrete
dc.subjectClay minerals
dc.subjectStable isotopes
dc.titleGeology, mineralogy, and geochemistry of late Miocene paleosol and calcrete in the western part of the Central Anatolian Volcanic Province (CAVP), Turkey
dc.typeArticle

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