Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6194
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dc.contributor.authorallSpulber, L.; Faculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romaniaen
dc.contributor.authorallEtiope, G; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallBaciu, C.; Faculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romaniaen
dc.contributor.authorallMalos, C.; Faculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romaniaen
dc.contributor.authorallVlad, S.N.; Faculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romania and Faculty of Ecology and Environmental Protection, Ecological University of Bucharest, Bucharest, Romaniaen
dc.date.accessioned2010-11-08T07:14:51Zen
dc.date.available2010-11-08T07:14:51Zen
dc.date.issued2010en
dc.identifier.urihttp://hdl.handle.net/2122/6194en
dc.description.abstractGas seepage from petroleum basins is the second largest natural source of methane to the atmosphere, after wetlands. The uncertainty in global emission estimates should be reduced by extending the flux database which is fundamental for defining the emission factors and the actual area of seepage adopted for up-scaling. As a contribution to this goal, we report a new seepage data-set for the Transylvanian Basin, one of the largest natural gas producing regions of Europe, that is characterized by the widespread occurrence of natural leakages of gas at the surface, including at least 73 mud volcanoes and gas seeps. In this study, methane flux was measured using closed-chambers, from 12 seepage sites, in correspondence with focused gas vents (mud volcano craters, bubbling pools, and flammable gas leaks), in the soil surrounding the vents, and at 15 sites located far from macroseep zones but close to gas fields. Fluxes from individual vents (macro-seeps) were found to reach orders of kg CH4 m)2 day)1 (up to 12 kg m)2 day)1) and diffuse fluxes from soils (miniseepage) were found to be up to a few g CH4 m)2 day)1. Far from seep zones, positive CH4 fluxes (microseepage) may occur locally, typically on the order of tens to hundreds of mg m)2 day)1. The values, as well as the occurrence of seepage even far from vent zones and in mud volcanoes that are apparently extinct, are coherent with results obtained in other countries. Gas fluxes from macro-seeps and soils may change seasonally, but the interannual variation of the average emission factor was found to be minimal. The total CH4 output for Transylvania macro-seeps is estimated conservatively to be around 680 t year)1; the total geo-CH4 seepage emission from the Transylvania petroleum system could be approximately 40 · 103 t year)1, and at least 100 · 103 t year)1 for all Romanian petroleum systems, that is roughly 10% of the total anthropogenic CH4 emission in the country.en
dc.language.isoEnglishen
dc.publisher.nameBlackwell Publishing Ltden
dc.relation.ispartofGeofluidsen
dc.relation.ispartofseries4/ 10 (2010)en
dc.subjectgas reservoirsen
dc.subjectmethane emissionsen
dc.subjectmud volcanoesen
dc.subjectseepsen
dc.subjectTransylvanian Basinen
dc.titleMethane emission from natural gas seeps and mud volcanoes in Transylvania (Romania)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber463-475en
dc.subject.INGV04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneousen
dc.identifier.doi10.1111/j.1468-8123.2010.00301.xen
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dc.description.obiettivoSpecifico4.5. Studi sul degassamento naturale e sui gas petroliferien
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.contributor.authorSpulber, L.en
dc.contributor.authorEtiope, Gen
dc.contributor.authorBaciu, C.en
dc.contributor.authorMalos, C.en
dc.contributor.authorVlad, S.N.en
dc.contributor.departmentFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romaniaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romaniaen
dc.contributor.departmentFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romaniaen
dc.contributor.departmentFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romania and Faculty of Ecology and Environmental Protection, Ecological University of Bucharest, Bucharest, Romaniaen
item.grantfulltextrestricted-
item.languageiso639-1en-
item.fulltextWith Fulltext-
item.openairetypearticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.classification.parent04. Solid Earth-
crisitem.author.deptFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romania-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romania-
crisitem.author.deptFaculty of Environmental Science, Babes¸ -Bolyai University, Cluj-Napoca, Romania and Faculty of Ecology and Environmental Protection, Ecological University of Bucharest, Bucharest, Romania-
crisitem.author.orcid0000-0001-8614-4221-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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