An overview of the geophysics activity within the canadian nuclear fuel waste management program

Soonawala, N. M.

doi:10.1016/0016-7142(84)90009-7

Cited by 11 publications

(7 citation statements)

References 13 publications

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“…The fracture zones FZ2 and FZ3 were not mappable for the line URLl, probably because they occur at very shallow depth of about 40-50 m (Soonawala, 1984). However.…”

Section: Focusing Analysismentioning

confidence: 91%

“…data processing, to image subsurface structures in the Precambrian shield (Hajnal and Stauffer, 1975;Noponen et al, 1979;Green and Mair, 1983; Barazangi and Brown, 1986). In general, the approach to detect and map shallow fracture zones includes high-resolution reflection profiling (Mair and Green, 1981;Green and Mair, 1983;Soonawala, 1984;Juhlin, 1990), multioffset VSP (Carswell and Moon, 1989;Juhlin et al, 1991), traveltime tomography (Wong et al, 1983), and diffraction tomography (Tura et al, 1992). LOCATION sonic logging data from the borehole URL-6.…”

Section: Introductionmentioning

confidence: 99%

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Imaging of reflection seismic energy for mapping shallow fracture zones in crystalline rocks

et al. 1994

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The high-resolution reflection seismic technique is being used increasingly to address geologic exploration and engineering problems. There are, however, a number of problems in applying reflection seismic techniques in a crystalline rock environment. The reflection seismic data collected over a fractured crystalline rock environment are often characterized by low signal-to-noise ratios (SIN) and inconsistent reflection events. Thus it is important to develop data processing strategies and correlation schemes for the imaging of fracture zones in crystalline rocks. Two sets of very low SIN, high-resolution seismic data, previously collected by two different contractors in Pinawa, Canada, and the island of Aspo, Sweden, were reprocessed and analyzed, with special emphasis on the shallow reflection events occurring at depths as shallow as 60--100 m.The processing strategy included enhancing the signals hidden behind large-amplitude noise, including clipped ground roll. The pre-and poststack processing includes shot f-k filtering, residual statics, careful muting after NMO correction, energy balance, and coherency filtering. The final processed seismic sec-

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“…The fracture zones FZ2 and FZ3 were not mappable for the line URLl, probably because they occur at very shallow depth of about 40-50 m (Soonawala, 1984). However.…”

Section: Focusing Analysismentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Imaging of reflection seismic energy for mapping shallow fracture zones in crystalline rocks

et al. 1994

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“…Let us apply the method of constructing interlineation-approximation operators to approximate the vector function of the acceleration r w x y z t ( , , , ) in seismic tomography in implementing the crosshole accelerometric mathematical model of the Earth's crust [18][19][20][21][22][23][24]. Such a mathematical model will allow calculating the acceleration at each point between chinks using the traces of the acceleration vector (seismic tomography data) in all chinks depending on depth z and time t. The formula for the basic auxiliary functions h x y k ( , ), k M = 1, , should take into account the irregular arrangement of the chinks and preserve the isogeometric properties of experimental data G k k M , , = 1 , r w z t k ( , ), -£ £ H z 0 , t ³ 0, k M = 1, .…”

Section: Constructing a Vector Space-time Interlineation-approximatiomentioning

confidence: 99%

The method of interlineation of vector functions $ \vec{w} $ (x, y, z, t) on a system of vertical straight lines and its application in crosshole seismic tomography

2013

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The authors propose a method to construct interlineation operators for vector functions r w x y z t ( , , , ) on a system of arbitrarily located vertical straight lines. The method allows calculating the vector r w at each point ( , , ) x y z between straight lines G k for any instant of time t ³ 0 . They are proposed to be used to construct a crosshole accelerometer to model Earth's crust on the basis of seismic sounding data r w z t k M k ( , ), , = 1 , about the vector of acceleration r w x y z t ( , , , ) received by accelerometers at each chink G k .

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“…An overview was given by Soonawala (1984). Geophysics plays a particularly significant role within this program.…”

Section: Areas Of Applicationmentioning

confidence: 99%

Seismic Tomography

1987

196

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An overview of the geophysics activity within the canadian nuclear fuel waste management program

Cited by 11 publications

References 13 publications

Imaging of reflection seismic energy for mapping shallow fracture zones in crystalline rocks

Imaging of reflection seismic energy for mapping shallow fracture zones in crystalline rocks

The method of interlineation of vector functions $ \vec{w} $ (x, y, z, t) on a system of vertical straight lines and its application in crosshole seismic tomography

Seismic Tomography

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