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  • 03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases  (2)
  • American Association for the Advancement of Science  (1)
  • Sudia Universitatis  (1)
  • Institute of Electrical and Electronics Engineers (IEEE)
  • International Union of Crystallography
  • International Union of Crystallography (IUCr)
  • 2005-2009  (2)
  • 1950-1954
  • 1
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    Earth's Degassing: A Missing Ethane and Propane Source (2009)
    American Association for the Advancement of Science
    Details
    Publication Date: 2017-04-04
    Description: BREVIA
    Description: Current emission inventories require an additional "unknown" source to balance the global atmospheric budgets of ethane (C2H6). Here, we provide evidence that a substantial part of the missing source can be attributed to natural gas seepage from petroliferous, geothermal, and volcanic areas. Such geologic sources also inject propane (C3H8) into the atmosphere. The analysis of a large data set of methane (CH4), ethane, and propane concentrations in surface gas emissions of 238 sites from different geographic and geologic areas, coupled with published estimates of geomethane emissions, suggests that Earth's degassing accounts for at least 17% and 10% of total ethane and propane emissions, respectively.
    Description: Published
    Description: 478
    Description: 3.8. Geofisica per l'ambiente
    Description: JCR Journal
    Description: reserved
    Keywords: Ethane ; Propane ; Geologic emissions ; Seepage ; 03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    Gas Migration in the Geosphere: the "Geogas" Theory (2008)
    Sudia Universitatis
    Details
    Publication Date: 2017-04-04
    Description: Gas migration in the geosphere is a widespread process, that occurs in numerous geological environments. The most important gases taken into account are CO2, generally present in volcanic and geothermal areas, ans CH4, mainly related to hydrocarbon-prone areas. Diffusion and groundwater flow were traditionally considered as the main mechanisms responsible for the gas migration. However, this approach failed to explain the behaviour of gases in particular situations, such as the long distance transport of radon, or the rapid variations of hydrocarbon anomalies in soil. The "geogas" integrative theory represents a contribution of the last decades, proposing a re-evaluation of several concepts of gas migration in the Earth's crust. Various mechanism of gas migration are described in the present article. The importance of rapid advection and the capabilities of microbubble transport are highlighted.
    Description: Published
    Description: 95-101
    Description: 3.8. Geofisica per l'ambiente
    Description: N/A or not JCR
    Description: reserved
    Keywords: gas migration ; geogas theory ; advection ; microbubbles ; 03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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