1994
DOI: 10.1016/0883-2927(94)90052-3
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Environmental conditions affecting concentrations of He, CO2, O2 and N2 in soil gases

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Cited by 146 publications
(84 citation statements)
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“…The concentrations of Hg, Rn, CO 2 , H 2 and He in soil gas at 756 sampling sites were measured in the field at approximately 1.5-km interval between each two sampling sites. The emission of deep-source gases can be affected by soil moisture, air temperature and barometric pressure (Hinkle 1994); thus from 8 th April to 7 th May, spring, 2010, a period of stable meteorological conditions in North China was selected for the soil gas survey in this work. The Tangshan area is located along North latitude 39° -40° ( Fig.…”
Section: Soil Gas Surveymentioning
confidence: 99%
See 1 more Smart Citation
“…The concentrations of Hg, Rn, CO 2 , H 2 and He in soil gas at 756 sampling sites were measured in the field at approximately 1.5-km interval between each two sampling sites. The emission of deep-source gases can be affected by soil moisture, air temperature and barometric pressure (Hinkle 1994); thus from 8 th April to 7 th May, spring, 2010, a period of stable meteorological conditions in North China was selected for the soil gas survey in this work. The Tangshan area is located along North latitude 39° -40° ( Fig.…”
Section: Soil Gas Surveymentioning
confidence: 99%
“…The fluxes of soil gases are controlled by many factors in different ways including mantle degassing, tectonic geometry, atmospheric permutation, biogenic process, radiogenic production, and rock alteration. (Hinkle 1994;Ciotoli et al 2007) which indicates that the gaseous species in soil have multiple sources and their concentrations are due to different factors. Thus, it has been emphasized that increasing the density of monitoring sites (high-density sampling sites) and components (multiple indicators) can be a better solution for well understanding the soil gas geochemical background and earthquake precursors in a seismic area (Ciotoli et al 2007;Walia et al 2010).…”
Section: Introdutionmentioning
confidence: 99%
“…The concentrations of soil gas can be affected by seismotectonic activity, rock types, porosity and composition of soil, meteorological parameters (e.g., temperature, precipitation and air moisture) and structural type (Hinkle, 1994;Toutain and Baubron, 1999;Fu et al, 2005Fu et al, , 2008Walia et al, 2008;Lombardi and Voltattorni, 2010;Zhou et al, 2010). As meteorological parameters varied slightly between the two soil gas surveys (Fig.…”
Section: Fault Activitiesmentioning
confidence: 99%
“…The surveys should be performed during summer or dry periods to avoid climatic factors which may affect soil gas values (Hinkle, 1994). Shallow soil gas samples are obtained using a 1 m stainless steel probe fitted with a brass valve: this system enables soil gas to be collected and stored in metallic containers (with a vacuum 10 -2 atm) for laboratory analysis or to be pumped for on-site Rn analysis.…”
Section: Sampling and Analytical Proceduresmentioning
confidence: 99%
“…The evaluation of long-term behaviour of clays under normal and extreme conditions is still the main topic in questions relating the role of clays as geological barrier for the permanent isolation of long-lived toxic residues. Soil gas distribution would be affected by surface features such as pedological, biogenic and meteorological factors: these are supposed to have only a subordinate effect on gas leakage (Hinkle, 1994). However, it is possible to properly interpret soil gas anomalies and recognize influences of surface features studying the association of different gases (having different origin and physical/chemical behaviour), collecting a large number of samples during periods of stable meteorological and soil moisture conditions (e.g., during dry season) and using appropriate statistical treatment of data (experimental variograms to investigate the spatial dependency of gas concentrations).…”
Section: Introductionmentioning
confidence: 99%