Across-fault distributions of radon concentrations in soil gas for different tectonic environments

다국어 초록 (Multilingual Abstract)

The radon concentration in soil gas at the crustal surface is closely related to the development of local fractures. Therefore, the spatial variation in soil-gas radon concentrations across faults differs between fault zones located in different tectonic environments. This study investigates the Beiluntai thrust fault and the Haiyuan strike-slip fault in west China, which are assumed to be typical examples of the different types of faults. Radon concentrations in soil gas were measured at various locations around these faults, and the spatial variation in these concentrations was characterized along fault-perpendicular profiles. For normal fault, our results indicate that concentrations are usually highest at the fault, and decrease gradually away from the fault in either direction. For thrust, however, concentrations increase in the hanging wall approaching the fault, but decrease sharply at the fault. For strike-slip fault with extension across the fault, soil-gas radon concentrations are relatively high at the fault, and decrease gradually with distance from the fault. For strike-slip fault with contraction across the fault, soil-gas radon concentrations are relatively low at the fault, and increase gradually with distance from the fault.

참고문헌 (Reference)

1 Phuong, N.K., "Water geochemistry and soil gas survey at Ungaran geothermal field, central Java, Indonesia" 229-230 : 23-33, 2012

2 Yang, T.F., "Variations of soil radon and thoron concentrations in a fault zone and prospective earthquakes in SW Taiwan" 40 : 496-502, 2005

3 Linde, A.T., "Triggering of volcanic eruptions" 395 : 888-890, 1998

4 Chyi, L.L., "The experimental investigation of soil gas radon migration mechanisms and its implication in earthquake forecast" 10 : 556-563, 2010

5 Ciotoli, G., "The detection of concealed faults in the Ofanto Basin using the correlation between soil-gas fracture surveys" 301 : 321-332, 1999

6 Idriss, H., "Study of radon in soil gas, trace elements and climatic parameters around South Kordofan state, Sudan" 72 : 335-339, 2014

7 Cho, B.-W., "Spatial relationships between radon and topographical, geological, and geochemical factors and their relevance in all of South Korea" 74 : 5155-5168, 2015

8 King, C.-Y., "Spatial radon anomalies on active faults in California" 11 : 497-510, 1996

9 Neri, M., "Spatial distribution of soil radon as a tool to recognize active faulting on an active volcano: the example of Mt. Etna (Italy)" 102 : 863-870, 2011

10 Baykara, O., "Soil radon monitoring and anomalies in East Anatolian Fault System (Turkey)" 279 : 159-164, 2009

11 Jonsson, G., "Soil radon levels measured with SSNTD's and the soil radium content" 31 : 291-294, 1999

12 Imme, G., "Soil radon concentration and volcanic activity of Mt. Etna before and after the 2002 eruption" 41 : 241-245, 2006

13 Papp, B., "Soil radon and thoron studies near the mofettes at Harghita Bai (Romania) and their relation to the field location of fault zones" 10 : 586-593, 2010

14 Bonforte, A., "Soil gases and SAR measurements reveal hidden faults on the sliding flank of Mt. Etna (Italy)" 251 : 27-40, 2013

15 Choubey, V.M., "Relation between soil-gas radon variation and different lithotectonic units, Garhwal Himalaya, India" 51 : 587-592, 1999

16 Tuccimei, P., "Real-time setup to record radon emission during rock deformation: implications for geochemical surveillance" 5 : 39-62, 2015

17 Nazaroff, W.W., "Radon transport from soil to air" 30 : 137-160, 1992

18 Mudd, G.M., "Radon releases from Australian uranium mining and milling projects: assessing the UNSCEAR approach" 99 : 288-315, 2008

19 Abdallah, S.M., "Radon measurements in well and spring water in Lebanon" 42 : 298-303, 2007

20 Tabar, E., "Radon measurements in water samples from the thermal springs of Yalova basin, Turkey" 299 : 311-319, 2014

21 La Delfa, S., "Radon measurements in the SE and NE flank of Mt. Etna (Italy)" 42 : 1404-1408, 2007

22 Cosma, C., "Radon implication in life and earth science: Baita-Stei area and Peceneaga-Camena fault (Romania)" 9 : 15-21, 2014

23 Trique, M., "Radon emanation and electric potential variations associated with transient deformation near reservoir lakes" 399 : 137-141, 1999

24 Han, Y.L., "Radon distribution in groundwater of Taiwan" 14 : 173-179, 2006

25 Tuccimei, P., "Radon and thoron emission from lithophysae-rich tuff under increasing deformation: an experimental study" 37 : L05305-, 2010

26 Seminsky, K.Zh., "Radon activity of faults (western Baikal and southern Angara areas)" 50 : 682-692, 2009

27 Perez, N.M., "Precursory subsurface $^{222}Rn\;and\;^{220}Rn$ degassing signatures of the 2004 seismic crisis at Tenerife, Canary Islands" 164 : 2431-2448, 2007

28 Luo, F.Z., "New activity traces of active faults nearby Kuerle, Xinjiang" 16 : 148-153, 2002

29 Kobeissi, M.A., "Natural radioactivity measurements in building materials in southern Lebanon" 99 : 1279-1288, 2008

30 Sulochana, V., "Morphology based radon processed neural network for transmission line fault detection" Communications and Informatics 1137-1143, 2015

31 Liu-Zeng, J., "Millennial recurrence of large earthquakes on the Haiyuan Fault near Songshan, Gansu Province, China" 97 : 14-34, 2007

32 Etiope, G., "Migration of carrier and trace gases in the geosphere: an overview" 129 : 185-204, 2002

33 Namvaran, M., "Measuring the radon concentration and investigating the mechanism of decline prior an earthquake (Jooshan, SE of Iran)" 298 : 1-8, 2013

34 Mazur, D., "Measurements of radon concentration in soil gas by CR-39 detectors" 31 : 295-300, 1999

35 Cavalie, O., "Measurement of interseismic strain across the Haiyuan fault (Gansu, China), by InSAR" 275 : 246-257, 2008

36 Kobeissi, M.A., "Measurement of anomalous radon gas emanation across the Yammouneh Fault in southern Lebanon: a possible approach to earthquake prediction" 6 : 250-266, 2015

37 Zarroca, M., "Integrated geophysics and soil gas profiles as a tool to characterize active faults: the Amer fault example (Pyrenees, NE Spain)" 67 : 889-910, 2012

38 Siniscalchi, A., "Insights into fluid circulation across the Pernicana Fault (Mt. Etna, Italy) and implications for flank instability" 193 : 137-142, 2010

39 Mollo, S., "Increase in radon emission due to rock failure: an experimental study" 38 : L14304-, 2011

40 Catalano, R., "In situ and laboratory measurements for radon transport process study" 306 : 673-684, 2015

41 Choubey, V.M., "Impact of geohydrology and neotectonic activity on radon concentration in groundwater of intermontane Doon Valley, Outer Himalaya, India" 40 : 257-266, 2001

42 King, C.-Y., "Hydrogeochemical anomalies and the 1995 Kobe earthquake" 269 : 38-39, 1995

43 Zunic, Z.S., "High natural radiation exposure in radon spa areas: a detailed field investigation in Niska Banja (Balkan region)" 89 : 249-260, 2006

44 Kobeissi, M.A., "Health assessment of natural radioactivity and radon exhalation rate in granites used as building materials in Lebanon" 153 : 342-351, 2013

45 Zahorowski, W., "Ground based radon-222 observations and their application to atmospheric studies" 76 : 3-33, 2004

46 Scheib, C., "Geological controls on radon potential in England" 124 : 910-928, 2013

47 Neri, M., "Flank instability on Mount Etna: Radon, radar interferometry, and geodetic data from the southwestern boundary of the unstable sector" 112 : B04410-, 2007

48 Caine, J.S., "Fault zone architecture and permeability structure" 24 : 1025-1028, 1996

49 Przylibski, T.A., "Estimating the radon emanation coefficient from crystalline rocks into groundwater" 53 : 473-479, 2000

50 Roeloffs, E., "Earth science: radon and rock deformation" 399 : 104-105, 1999

51 Heiligmann, M., "Distal degassing of radon and carbon dioxide on Galeras volcano, Colombia" 77 : 267-283, 1997

52 Neri, M., "Continuous soil radon monitoring during the July 2006 Etna eruption" 33 : L24316-, 2006

53 Zimmer, M., "Continuous $H_2O,\;CO_2,\;^{222}Rn$ and temperature measurements on Merapi volcano, Indonesia" 125 : 25-38, 2003

54 Giammanco, S., "Comparison between different methodologies for detecting radon in soil along an active fault: the case of the Pernicana fault system, Mt. Etna (Italy)" 67 : 178-185, 2009

55 Kemski, J., "Classification and mapping of radon-affected areas in Germany" 22 : 789-798, 1996

56 Ben-Zion, Y., "Characterization of fault zones" 160 : 677-715, 2003

57 Appleton, J.D., "A statistical evaluation of the geogenic controls on indoor radon concentrations and radon risk" 101 : 799-803, 2010

58 Wiegand, J., "A guideline for the evaluation of the soil radon potential based on geogenic and anthropogenic parameters" 40 : 949-963, 2001

59 Perrier, F., "A direct evidence for high carbon dioxide and radon-222 discharge in Central Nepal" 278 : 198-207, 2009

60 Wattananikorn, K., "A combination of soil gas radon measurements in uranium exploration" 9 : 643-652, 1995

61 Somlai, K., "$^{222}Rn$ concentrations of water in the Balaton Highland and in the southern part of Hungary, and the assessment of the resulting dose" 42 : 491-495, 2007

62 Heinicke, J., "$CO_2$ and radon measurements in the Vogtland Area (Germany) - a contribution to earthquake prediction research" 22 : 771-774, 1995