Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11556
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dc.date.accessioned2018-03-28T10:37:35Zen
dc.date.available2018-03-28T10:37:35Zen
dc.date.issued2018-02en
dc.identifier.urihttp://hdl.handle.net/2122/11556en
dc.description.abstracthe purpose of this study is to characterize sedimentologically and isotopically authigenic mineralization and low-rank coals (lignite) from the Velenje basin, Slovenia. Six structural types of calcite mineralization in a fine lignite gelified matrix were recognized, namely: (A) laminae and thin beds, (B) small lenses and lenticular bodies, (C) dispersed mineral matter in minute detritus, (D) calcite-substituted xylite fragments, (E) encrusted xylite fragments, and (F) calcite-coated and calcite-filled pores. Scanning electron microscopy revealed that in parts the calcified lignite is almost pure calcite. The carbon (–4.3 to +16.4‰) and oxygen (–14.5‰ to –6.6‰) isotopic composition indicates a carbonate precipitation temperature of between 5.7 and 45.5°C. The δ13Corg. values and δ15Nbulk of organic compounds were from –29.4‰ to –23.7‰ and from +1.8‰ to +5.9‰, respectively. The lower δ13Corg. values (up to –29.4‰) in the Velenje lignite indicate a high degree of gelification, while the δ15Nbulk values (up to +5.9‰) are indicative of intense mineralization. Furthermore, a carbon isotope fractionation factor (εTOC) of more than 32% suggests that unlike in recent lake sediments from Slovenia, Croatia, and Argentina, where oxic processes dominate, there was intense microbial activity (methane formation in anoxic conditions). In addition, the εTOC values in the Velenje samples are unrelated to mineralization type but are related to the degree of gelification (bacterial activity). The investigation of mineral occurrence is important since cleat-filling minerals reduce coal permeability, which in turn can trigger gas outbursts and inhibit gas extraction.en
dc.language.isoEnglishen
dc.publisher.nameSociety for Sedimentary Geologyen
dc.relation.ispartofJournal of Sedimentary Researchen
dc.relation.ispartofseries/88 (2018)en
dc.titleAuthigenic Mineralization in Low-rank Coals from the Velenje Basin, Sloveniaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber201-213en
dc.identifier.URLhttps://pubs.geoscienceworld.org/sepm/jsedres/article-abstract/88/2/201/528172/authigenic-mineralization-in-low-rank-coals-from?redirectedFrom=fulltexten
dc.identifier.doi10.2110/jsr.2018.7en
dc.description.obiettivoSpecifico7SR AMBIENTE – Servizi e ricerca per la societàen
dc.description.journalTypeJCR Journalen
dc.contributor.authorKanduČ, TjaŠaen
dc.contributor.authorVreČa, Polonaen
dc.contributor.authorGregorin, Špelaen
dc.contributor.authorVrabec, Mirijamen
dc.contributor.authorVrabec, Markoen
dc.contributor.authorGrassa, Faustoen
dc.contributor.departmentDepartment of Environmental Sciences, Joˇzef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Sloveniaen
dc.contributor.departmentDepartment of Environmental Sciences, Joˇzef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Sloveniaen
dc.contributor.departmentMoste 98a, 1218 Komendaen
dc.contributor.departmentDepartment of Geology, Faculty of Natural Science and Engineering, University of Ljubljana, Aˇskerˇceva 12, 1000 Ljubljana, Sloveniaen
dc.contributor.departmentDepartment of Geology, Faculty of Natural Science and Engineering, University of Ljubljana, Privoz 11, 1000 Ljubljana, Sloveniaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptDepartment of Environmental Sciences, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia-
crisitem.author.deptDepartment of Environmental Sciences, Joˇzef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia-
crisitem.author.deptMoste 98a, 1218 Komenda-
crisitem.author.deptDepartment of Geology, Faculty of Natural Science and Engineering, University of Ljubljana, Aˇskerˇceva 12, 1000 Ljubljana, Slovenia-
crisitem.author.deptDepartment of Geology, Faculty of Natural Science and Engineering, University of Ljubljana, Privoz 11, 1000 Ljubljana, Slovenia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.orcid0000-0001-5920-0865-
crisitem.author.orcid0000-0001-5043-792X-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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