Depositional conditions of the coal-bearing Hirka Formation beneath late miocene explosive volcanic products in NW central Anatolia, Turkey

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dc.contributor.authorSener, Mehmet
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2007
dc.departmentNiğde ÖHÜ
dc.description.abstractThis work focuses on the relationship between the coal deposition and explosive volcanism of the Miocene basin, NW central Anatolia, Turkey. The coal-bearing Hirka Formation was deposited over the Galatian Andesitic Complex and/or massive lagoonal environments during the Miocene. The investigated lignite is a high ash (from 32 to 58%) and sulphur (from 1.43 to 3.03%) lignite which is petrographically characterised by a high humunite content. The mineral matter of the studied lignite samples is made up of mainly clay minerals (illite-smectite and kaolinite), plagioclase and quartz in Bolu coal field, clay minerals (illite-smectite, smectite and illite), quartz, calcite, plagioclase and gypsum in Seben coal field, quartz, K-feldspar, plagioclase and clay minerals (kaolinite and illite) in Kibriscik, and dolomite, quartz, clinoptilolite, opal CT and gypsum in Camhdere coal field. The differences in these four types of lignite with specific mineralogical patterns may be due to the explosive volcanic events and depositional conditions which changed from one coal field to the others. There is a zonation from SW to SE in the studied area for zeolites- such as Opal CT+smectite-clinoptilolite-analcime-K-feldspar. Carbonate minerals are commonly calcite in Seben and Kibriscik coal fields. In Bolu, coal samples are devoid of calcite and dolomite. These analyses show that there is an increase in the amount of Mg and a decrease in the amount of Na from the northwestern part to the southern part in the study area.
dc.identifier.doi10.1007/s12040-007-0012-8
dc.identifier.endpage135
dc.identifier.issn0253-4126
dc.identifier.issue2
dc.identifier.scopus2-s2.0-34247502907
dc.identifier.scopusqualityN/A
dc.identifier.startpage125
dc.identifier.urihttps://dx.doi.org/10.1007/s12040-007-0012-8
dc.identifier.urihttps://hdl.handle.net/11480/5399
dc.identifier.volume116
dc.identifier.wosWOS:000246346600004
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorSener, Mehmet
dc.language.isoen
dc.publisherINDIAN ACADEMY SCIENCES
dc.relation.ispartofJOURNAL OF EARTH SYSTEM SCIENCE
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectcoal
dc.subjectoil shale
dc.subjectzeolite
dc.subjectclay minerals
dc.subjectGalatian Andesite Complex
dc.subjectTurkey
dc.titleDepositional conditions of the coal-bearing Hirka Formation beneath late miocene explosive volcanic products in NW central Anatolia, Turkey
dc.typeArticle

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