Soil gas profiles as a tool to characterise active tectonic areas: the Jaut Pass example (Pyrenees, France)

Baubron, Jean-Claude; Rigo, Alexis; Toutain, Jean

doi:10.1016/s0012-821x(01)00596-9

Cited by 140 publications

(114 citation statements)

References 28 publications

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“…Thus changes stated on soil gas concentrations must preferentially reflect heterogeneities linked to soil or tectonic structures affecting underlying rocks (Baubron et al, 2002;Ciotoli et al, 1999). In that sense measurements appear to be more related to the characterization of the geological framework rather than to rely on externally driven variations.…”

Section: External Forcingmentioning

confidence: 99%

CO2 escapes in the Laacher See region, East Eifel, Germany: Application of natural analogue onshore and offshore geochemical monitoring

Gal

Brach

Braibant

et al. 2011

International Journal of Greenhouse Gas Control

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Natural analogues studies have received growing interest during preceding years in a CCS perspective. There is a strong willing to deploy robust and reliable technologies to ensure the safety and integrity of CO 2 underground storages. Here we present a dataset acquired in the Eifel volcanic district, using geochemical monitoring methods focusing on both dissolved and gaseous species.Onshore and offshore monitoring (Lake Laacher See) were performed to depict spatial behaviour of CO 2 natural releases. Additional gaseous species, mainly helium and radon, were also monitored to better assess the shapes of gas vents, using methodologies that were learned from hydrological and tectonic applications. Lake water monitoring allowed the characterisation of the water body itself, in terms of lateral heterogeneities, to evaluate the impact of CO 2 deep degassing near the bottom of the lake. The use of a dedicated sensor for monitoring in situ CO 2 partial pressure did not provide more valuable information that was learned from more classical physico-chemical parameters. From those investigations, the usefulness of geochemical monitoring is still demonstrated, but the use of complementary approaches and methods is still needed to get a powerful set of techniques able to warn in case of leakages occurring from depth.

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Section: External Forcingmentioning

confidence: 99%

CO2 escapes in the Laacher See region, East Eifel, Germany: Application of natural analogue onshore and offshore geochemical monitoring

Gal

Brach

Braibant

et al. 2011

International Journal of Greenhouse Gas Control

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“…All the results were listed in Table1 [16,17]. These values were used to calculate the Rn-222 activity of emanation in air near the ground by using equation (3) with an average value (3897).…”

Section: Resultsmentioning

confidence: 99%

Measurement of Radon Activity in Soil Gas and the Geogenic Radon Potential Mapping Using RAD7 at Al-Tuwaitha Nuclear Site and the Surrounding Areas

Al-Bakhat¹

2017

RST

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Abstract:In this study Soil gas radon 222 Rn activity was measured in different locations at Al-Tuwaitha Nuclear Site and the surrounding areas using RAD7 (radon detector). Radon activity in the soil gas varied from (866±150 to 16004±521 ) Bq/m 3 near Alaibtihal School and Ishtar \ Al-Ttakhi School respectively. These concentrations values are well below the allowed levels that range from (0.4 to 40) KBq/m 3 . The annual effective doses related to the inhalation of radon gas and its progeny which were calculated from the Concentration of emanation in air near ground ranged from (0.0082305 to 0.152102) mSv/y. these results are less than the recommended global average dose from the inhalation of radon from all sources, which is 1 mSv/y. The Health risks originating from indoor radon concentration can be attributed to natural factors and is characterized by geogenic radon potential (GRP), The highest values were found in Ishtar \ Al-Ttakhi school which is (16.004) and The lowest values were found Near Alaibtihal school which is (0.288666667), the lowest value according to Neznal was classified as low (GRP < 10) and the highest value was classified as medium (10 < GRP < 35), according to Barnet and Pacherová low GRP causes <230 Bq m -3 while medium GRP causes 230-460 Bq m -3 indoor radon concentration. From these different values of GRP a geogenic radon risk map was created, which assists human health risk assessment and risk reduction since it indicates the potential of the source of indoor radon. The results from this study shows that the region has background radioactivity levels within the natural limits.

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“…The elevation of radon (Rn) concentration in soil gas is known to be associated with and locate active faults (King et al, 1996;King, 1978;Al-Hilal and Al-Ali, 2010;Amponsah et al, 2008;Asumadu-Sakyi et al, 2010;Baubron et al, 2002;Burton et al, 2004;Font et al, 2008;González-Díez et al, 2009;Haerudin et al, 2013;Ioannides et al, 2003;Israel and Bjornsson, 1967;Lombardi and Voltattorni, 2010;Papastefanou, 2010;Seminsky and Demberel, 2013;Swakon et al, 2004;Tanner, 1980;Utkin and Yurkov, 2010;Walia et al, 2008). Since then, soil radon gas geochemistry is considered as a quantitative method to study active faults.…”

Section: Introductionmentioning

confidence: 99%

Study on active tectonic faults using soil radon gas method in Viet Nam

et al. 2017

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This paper presents the results of soil radon gas measurement in three areas, including Thac Ba and Song Tranh 2 hydropower plants, and the planned locations of the nuclear power plants Ninh Thuan 1&2 using solid-state nuclear track detectors (SSNTD) with the aim of clarifying the activity of tectonic faults in these areas. The activity of tectonic faults was assessed through radon activity index KRn (the ratio between anomaly and threshold), which was divided into 5 levels as follows ultra-high (K Rn > 10), high (10≥K Rn > 5), high (5≥K Rn > 3), medium (3≥K Rn > 2) and low (K Rn ≤2). Soil radon gas measurement results showed that in the radon gas concentrations in the Thac Ba hydropower plant area ranged from 72 Bq/m 3 to 273.133 Bq/m 3 and maximum radon activity index KRn reached 9.75 (high level). High K Rn indexes show Chay River fault active in recent time and the sub-meridian distribution of Rn anomalies suggested a right-slip motion of the fault. Rn concentrations in the Ninh Thuan 1&2 areas ranged from 6 Bq/m 3 to 52.627 Bq/m 3 , however, the K Rn indexes were mostly low (K Rn ≤3) and the highest value was only 3.42, suggesting that expression of activity of the tectonic faults in this region is not clear, even no expression of fault activity. In the Song Tranh 2 hydropower plant and adjacent areas, radon concentrations ranged from 29 Bq/m 3 to 77.729 Bq/m 3 and maximum K Rn index was 20.16 (ultra-high level). The faults having clearer activity expression are Hung Nhuong -Ta Vy, Song Tra Bong and some high order faults, especially the northwest -southeast segments of these faults or their intersections with the northwest -southeast faults. In addition, the high values K Rn in the mentioned intersections can be evidenced for the activeness of northwest -southeast faults at the present time. The studies on active faults using soil radon gas method were performed in areas with very different geological and structural features, but the results are well consistent with the results of previous investigations obtained by other methods. It confirmed the effectiveness and capability of soil radon gas geochemistry applying to study active tectonic faults.

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Soil gas profiles as a tool to characterise active tectonic areas: the Jaut Pass example (Pyrenees, France)

Cited by 140 publications

References 28 publications

CO2 escapes in the Laacher See region, East Eifel, Germany: Application of natural analogue onshore and offshore geochemical monitoring

CO2 escapes in the Laacher See region, East Eifel, Germany: Application of natural analogue onshore and offshore geochemical monitoring

Measurement of Radon Activity in Soil Gas and the Geogenic Radon Potential Mapping Using RAD7 at Al-Tuwaitha Nuclear Site and the Surrounding Areas

Study on active tectonic faults using soil radon gas method in Viet Nam

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