English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/233264
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Estudo geoquímico dos coques naturais da Bacia de Peñarroya-Belmez-Espiel (Espanha)

Other TitlesGeochemical study of the natural coques from the Peñarroya-Belmez-Espiel Basin (Spain)
AuthorsMoura, H.; Marques, M. M.; Suárez Ruiz, Isabel CSIC ORCID ; Ribeiro, J.; Cunha, P. P.; Flores, D.
KeywordsPeñarroya-Belmez-Espiel Basin
Natural coke
petrographic features
geochemistry composition
Issue DateJul-2020
PublisherLaboratório Nacional de Energia e Geologia
CitationComunicacoes Geologicas 107 (Special Issue 2): 101-104 (2020)
AbstractThe natural cokes that occur in the eastern sector of the depocentre I of the Peñarroya-Belmez-Espiel Basin (Spain) resulted from the contact metamorphism induced in coals by the emplacement of a doleritic sill parallel to the stratification. In this study, geochemical data of three coke samples are presented and complemented with petrographic data. Organic particles exhibit circular and elliptical devolatilization pores, isotropic and, occasionally incipient anisotropic to fine mosaic texture pointing out that, at the time of carbonization, these coals should have reached a rank equivalent to a vitrinte random reflectance between 0.70% and 0.85%. The maximum reflectance for the coke particles close to the dolerite sill contact suggested a paleotemperature for the intrusion > 390 ºC. The alignment and folding of the devolatilization pores indicate that the emplacement of the doleritic sill was simultaneous to the folding of the sedimentary sequence. The ash yield is variable, the C content high and total sulfur content low. The composition in major and trace elements revealed that two of the samples are very enriched. The enrichment in Hg can be related to magmatic fluids and also to a secondary enrichment after volatilization of the original coal. The occurrence of the REE seems to be linked to the sedimentary mineralogical composition.
Publisher version (URL)https://www.lneg.pt/wp-content/uploads/2020/07/14_Moura-et-al-2020_Cores_final_101-104.pdf
Appears in Collections:(INCAR) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
14_Moura-et-al-2020_Cores_final_101-104.pdf315,71 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.