Ground penetrating radar investigations across the Uemachi fault, Osaka, Japan

Rashed, Mohamed; Kawamura, Daisaku; Nemoto, Hiroo; Miyata, Takeo; Nakagawa, Kōichi

doi:10.1016/s0926-9851(03)00028-4

Cited by 70 publications

(30 citation statements)

References 13 publications

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“…In this study, the in ter pre ta tion pro ce dure of pos si ble Qua ternary fault ac tiv ity along the GPR pro files mea sured was sim i lar to the pro ce dures pro posed by Meschede et al (1997), Rashed et al (2003), Ferry et al (2004), and Patidar et al (2007). It comprised: i) the rec og ni tion of the ra dar fa cies that de lin eate dif ferent lithological do mains; ii) the iden ti fi ca tion of the re flec tion trun ca tions that al locate fault planes.…”

Section: Methodology Of Ground Penetrating Radar Profilingsupporting

confidence: 51%

Quaternary fault activity in the SW Pannonian Basin: GPR surveying in Bilogora (NE Croatia)

Matoš

Zajc

Kordić

et al. 2016

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Section: Methodology Of Ground Penetrating Radar Profilingsupporting

confidence: 51%

Quaternary fault activity in the SW Pannonian Basin: GPR surveying in Bilogora (NE Croatia)

Matoš

Zajc

Kordić

et al. 2016

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“…However, these techniques have rarely been applied to vertical cliffs or steep rock slopes, probably due to practical difficulties when carrying out geophysical experiments in such extreme conditions. At a lower scale and/or in easier field conditions, the GPR (Ground Penetrating Radar) method has been successfully applied to comparable geological problems such as fault and fracture 2D mapping in resistive rocks from surface acquisitions (Benson, 1995;Stevens et al, 1995;Demanet et al, 2001;Rashed et al, 2003) and in boreholes (Zhou and Sato, 2000).…”

Section: Introductionmentioning

confidence: 99%

Multiconfiguration GPR measurements for geometric fracture characterization in limestone cliffs (Alps)

et al. 2006

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Until now, geophysical methods have been rarely used to investigate vertical limestone cliffs, mainly due to the extreme conditions for data acquisition. Nevertheless, these techniques are the only available methods which could provide information on the internal state or a rock mass in terms of discontinuities, which play a major role in rock-fall hazards. In this case study, detailed GPR measurements were carried out on a test site with different acquisition configurations deployed on vertical cliff faces. Conventional 2D profiles, common midpoints (CMP) and transmission data were acquired to evaluate the potential of radar waves to improve the characterization of the geometry and properties of the main discontinuities (fractures) within the massif. The results show that the 3D geometry of fractures, which is a crucial parameter for stability assessment, can be retrieved by combining vertical and horizontal profiles performed along the cliff. CMP profiles acquired along the cliff allow a velocity profile to be obtained as a function of depth. Finally, transmission experiments, which generate complex radargrams, have provided valuable and quantitative information on the rock mass, through the modelling of the waves generated. On the other hand, a velocity tomography obtained from the first arrivals travelling through the rock mass from the transmitters to the receivers, shows an image of the investigated zone with a poor resolution

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“…Use of these methods in characterization of thermal reservoir is well documented in the literature (BENSON et al, 1997;ZLOTNICKI et al, 1998;CAGLER and DEMIRORER, 1999;MAJUMDAR et al, 2000;SAVIN et al, 2001;RASHED et al, 2003;YASUKAWA et al, 2003). Geothermal reservoir's steam, water or heat can be used for electricity generation and other commercial purposes.…”

Section: Introductionmentioning

confidence: 99%

Integrated Geophysical Studies in the East-Indian Geothermal Province

Baranwal

Sharma

2006

Pure appl. geophys.

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Integrated geophysical surveys using vertical electrical sounding (VES), very low frequency (VLF) EM, radiation counting, total magnetic field and self-potential (SP) measurements are carried out to characterize the geothermal area around a hot spring in the Nayagarh district, Orissa, India that lies in the East Indian geothermal province. The study was performed to delineate the fracture pattern, contaminated groundwater movement and possible heating source. VES interpretations suggest a three-to four-layer structure in the area. Resistivity survey near the hot spring suggests that weathered and fractured formations constitute the main aquifer system and extend to 60 m depth. Current flow measured at various electrode separations normalized by the applied voltage suggests that fractures extend to a greater depth. Detailed VLF study shows that fractures extend beyond 70 m depth. VLF anomaly has also very good correlation with the total magnetic field measured along the same profiles. Study results suggest that a gridded pattern of VLF survey could map the underground conductive fracture zones that can identify the movement of contaminated groundwater flow. Therefore, precautionary measures can be taken to check further contamination by delineating subsurface conducting structures. Self potential (SP) measured over the hot spring does not show a large anomaly in favor of the presence of a sulphide mineral body. A small positive (5-15mV) SP anomaly is measured which may be streaming potential due to subsurface fluid flow. A high radiation is measured about four kilometers from the hot spring, suggesting possible radiogenic heating. However, the exact nature of the heating source and its depth is not known in the area. Deep resistivity followed by a magneto-telluric survey could reveal the deeper structures.

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Ground penetrating radar investigations across the Uemachi fault, Osaka, Japan

Cited by 70 publications

References 13 publications

Quaternary fault activity in the SW Pannonian Basin: GPR surveying in Bilogora (NE Croatia)

Quaternary fault activity in the SW Pannonian Basin: GPR surveying in Bilogora (NE Croatia)

Multiconfiguration GPR measurements for geometric fracture characterization in limestone cliffs (Alps)

Integrated Geophysical Studies in the East-Indian Geothermal Province

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