Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5814
DC Field | Value | Language |
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dc.contributor.authorall | Lombardi, S.; University of Rome "La Sapienza" | en |
dc.contributor.authorall | Voltattorni, N.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.date.accessioned | 2010-01-22T15:54:27Z | en |
dc.date.available | 2010-01-22T15:54:27Z | en |
dc.date.issued | 2009-09-29 | en |
dc.identifier.uri | http://hdl.handle.net/2122/5814 | en |
dc.description.abstract | The physical properties of clay allow to consider argillaceous formations as geological barriers to radionuclide migration in high-level radioactive-waste isolation systems. As laboratory simulations are short term and numerical models always involve assumptions and simplifications of the natural system, natural analogues are extremely attractive surrogates for the study of long-term isolation. The thermally altered clays of the Orciatico area (Tuscany, Central Italy) represent an interesting natural model of a heat source which acted on argillaceous materials. The study of this natural analogue was performed through detailed geoelectrical and soil-gas surveys in order to define both the geometry of the intrusive body and the gas permeability of a clay unit characterized by different thermal alteration degrees. In particular, soil-gas radon and carbon dioxide distributions highlighted that the clay sequences, in spite of their thickness and plasticity, if fractured and metamorphosed, form a lesser impermeable barrier for naturally migrating gas. | en |
dc.description.sponsorship | European Commission | en |
dc.language.iso | English | en |
dc.relation.ispartof | Impact of Thermo- Hydro- Mechanical - Chemical processes on the safety of underground radioactive waste repositories | en |
dc.subject | radionuclide migration | en |
dc.title | Soil-Gas Geochemistry as Permeability Tracer of Thermally Altered Clays at Orciatico (Tuscany, Central Italy) | en |
dc.type | Poster session | en |
dc.description.status | Unpublished | en |
dc.subject.INGV | 04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration | en |
dc.description.ConferenceLocation | Luxembourg | en |
dc.relation.references | Ciotoli, G., Lombardi, S., Serafini S., and Zarlenga, F. (1997). The refinement of geomorphological and geochemical statistical techniques in the study of clay-basin tectonics: the Era Basin (Central Italy). Italian Journal of Quaternary Sciences, 10 (2), 231-246. [2] Dayal, R. and Wilke, R.J., 1982. Role of clay minerals as backfill in radioactive waste disposal. Proc. Int. Clay Conf. Bologna]Pavia, 1981, pp. 771--787. [3] Gregory, R. G., and. Durrance, E. M (1985). Helium, carbon dioxide and oxygen soil gases: small-scale varations over fractured ground. J. Geochem. Expl., 24 (1), 29-49. [4] Hinkle, M. E., and Ryder, J. L. (1994). Effect of moisture and carbon dioxide on concentrations of helium in soils and soil gases. J. Geophys. Res., 92(B12), 12587-12594. [5] Hueckel, T., and Pellegrini R. (2002). Reactive plasticity for clays:application to a natural analog of long-term geomechanical effects of nuclear waste disposal. Engineering Geology, 64, 195-215. [6] Leoni, L., Polizzano, C, and Sartori F. (1986). Nuclear waste repositories in clays: the Orciatico methamorphic aureole analogy. Applied Clay Sequence, 1, 385-408. [7] Morse, R. H. (1976). The applied geochemistry of radon and related elements. Geological Association of Canada; Mineralogical Association of Canada; Canadian Geophysical Union, Joint Annual Meeting, 1, 44 pp. | en |
dc.description.obiettivoSpecifico | 4.5. Studi sul degassamento naturale e sui gas petroliferi | en |
dc.description.fulltext | open | en |
dc.contributor.author | Lombardi, S. | en |
dc.contributor.author | Voltattorni, N. | en |
dc.contributor.department | University of Rome "La Sapienza" | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
item.openairetype | Poster session | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Università La Sapienza | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-3940-8383 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Conference materials |
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File | Description | Size | Format | |
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Poster.pdf | poster | 509.55 kB | Adobe PDF | View/Open |
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