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Radiation-enhanced fluid diffusion and alteration around uraniferous inclusions in Cenomanian resinite from North Bohemia
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SYSNO ASEP 0605320 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Radiation-enhanced fluid diffusion and alteration around uraniferous inclusions in Cenomanian resinite from North Bohemia Author(s) Strunga, Vladimír (UJF-V) ORCID, SAI
Havránek, Vladimír (UJF-V) RID, SAI, ORCID
Lorinčík, J. (CZ)
Sihelská, K. (CZ)
Krist, Pavel (UJF-V) RID, ORCID, SAI
Havelcová, M. (CZ)
Čejková, B. (CZ)
Mizera, Jiří (UJF-V) RID, ORCID, SAINumber of authors 8 Article number 122554 Source Title Chemical Geology. - : Elsevier - ISSN 0009-2541
Roč. 673, February (2025)Number of pages 16 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords Radiation-induced alteration ; Fluid diffusion ; Fossil resin ; Alpha particles ; Alpha recoils ; Fission fragments ; mu-PIXE/RBS ; SEM/EDX OECD category Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) R&D Projects GA19-05360S GA ČR - Czech Science Foundation (CSF) Research Infrastructure CICRR - 90241 - Centrum výzkumu Řež s.r.o. Method of publishing Limited access Institutional support UJF-V - RVO:61389005 UT WOS 001402416900001 EID SCOPUS 85212128093 DOI https://doi.org/10.1016/j.chemgeo.2024.122554 Annotation Advanced analytical methods including SEM/EDX and mu -PIXE/RBS microanalyses were used to investigate chemical alterations around uraniferous inclusions in a Cenomanian fossil resin (resinite). Studied alterations related to several types of discontinuities in resinite matrix are a model example of the phase interface between solid polymeric hydrocarbon and aqueous fluids exposed to long-term irradiation by heavy energetic ions resulting mostly from the natural decay of uranium. Computational models of ion ranges correspond well with the observed range of alterations about 35 mu m from uraniferous inclusions. The major alteration is found within a 20 mu m inner zone. It is characterized by distinct sulfur enrichment and an increase in the O/C ratio. No sulfur enrichment in the resinite matrix occurs apart from the uraniferous phases. Proton beam-induced alterations of the resinite were investigated and compared with the natural ones. The differences indicate the importance of aqueous fluids in the natural radiation-induced alteration process. It is concluded that radiation-enhanced mass transfer and reactions occur at solid-fluid interfaces during the long-term energy deposition by alphas, alpha recoils, and fission fragments combined. The role of thermal effects and and formation of radical species by radiolysis of aqueous fluids on a microscale is discussed. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2026 Electronic address https://www.sciencedirect.com/science/article/pii/S000925412400634X
Number of the records: 1