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Showing 1 to 20 of 139 for “"seismic reflection"”.
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Seismic reflection moveout for azimuthally anisotropic media
… of fractures. In this thesis, we study the reflection moveout for Compressional and Shear waves in horizontally stratified azimuthally anisotropic media. Reflection moveout in common-midpoint (CMP) gathers is generally treated by an azimuthally-isotropic hyperbolic equation. Recently, …
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Study of seismic reflection data over Virginia Mesozoic basins
Studies of Vibroseis reflection profiles over the exposed Triassic-Jurassic Culpeper, Richmond, and Scottsville Basins, and another profile over a probable early Mesozoic basin (Toano) beneath the Atlantic Coastal Plain sediments, in Virginia indicate that resolution of the geometry of the basins …
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Digital processing of seismic reflection records from South Park, Colorado
Includes bibliographical references (pages 157-159).
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Tectonics of the West Iberia continental margin from seismic reflection data
… transition. Interpretation of multichannel seismic data and tectonic subsidence analyses suggests that the ridge is located within a broad zone of exhumed mantle that has been serpentinized. This implies that seafloor spreading does not immediately follow continental breakup. Where the …
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Derivation of Acoustic and Physical Properties from High-Resolution Seismic Reflection Data
… develops methods using high-resolution marine seismic reflection data to generate accurate, precise, and repeatable estimations of the in situ seismic quality factor (Q) and velocity, within the uppermost 100 m of unconsolidated marine sediments. This was achieved using a single channel Chirp …
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A seismic reflection study over the Bane anticline in Giles County, Virginia
A seismic reflection study over the Bane anticline in southwest Virginia (37° 16' 50" N, 80° 41' 30" W) was made in an attempt to gain information about the thickness of sedimentary rocks in this part of the Appalachian Valley and Ridge province. Eleven seismograms were obtained. In addition to …
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Preliminary seismic reflection studies of the Brevard Zone near Rosman, North Carolina
A seismic reflection study was carried out southeast of the Brevard Zone in the Inner Piedmont province of southwestern North Carolina. Two geophone spreads approximately transverse to the regional strike were located 7 km and 9.25 km southeast of the Brevard Zone. The area of the study is …
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Correlation of seismic reflection data with seismicity over the Ramapo, New Jersey, fault zone
Reflection seismic data, mylonite reflectivity, gravity data, and earthquake hypocenters have been integrated into a possible explanation for seismicity in the Ramapo fault area. Seven reflection seismic lines were processed using variations in sorting and residual statics. Single VIBROSEIS sweeps …
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Paleozoic and Grenvillian structures in the southern Appalachians: extended interpretation from seismic reflection data
Interpretive reprocessing of seismic reflection data and correlation of the seismic data with gravity data have elucidated Paleozoic and Grenvillian structures in the southern Appalachians. The seismic data include ADCOII, Seisdata, and COCORP reflection profiles which traverse the Blue Ridge and …
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Seismic Reflection and Gravity Constraints on the Bedrock Configuration in the Greater East Missoula Area
… of this map may be improved through the use of seismic reflection techniques, better estimates of the density contrast used in the gravity modeling, and by extending the gravity survey to include more data and a broader area. The seismic reflection technique used to supplement the gravity data …
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Seismic Reflection and Gravity Constraints on the Bedrock Configuration in the Greater East Missoula Area
… of this map may be improved through the use of seismic reflection techniques, better estimates of the density contrast used in the gravity modeling, and by extending the gravity survey to include more data and a broader area. The seismic reflection technique used to supplement the gravity data …
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Seismic reflection imaging of near surface structures using the Common Reflection Surface (CRS) Stack Method
… for processing of shallow and ultrashallow reflection data. The CRS stack is a seismic imaging method established for oil and gas exploration that is similar in concept to the conventional CMP stack method. Unlike the CMP stack, the CRS stack process is not confined to single CMP gathers …
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Stratigraphic and structural interpretation of seismic reflection data across selected sections of the Kaapvaal Craton
… describes and interprets eight newly available seismic reflection profiles, acquired by the vibroseis method to 6 seconds TWT, and totaling ~720 km in length. New stratigraphic and structural features are identified across three main regions: the Kaapvaal Craton's western margin, the northern …
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Structural observations at the southern Dead Sea Transform from seismic reflection data and ASTER satellite images
… ASTER (Advanced Spacebourne Thermal Emission and Reflection Radiometer) Satellitendaten herangezogen, um oberflächennahe Deformation und neotektonische Aktivität zu bestimmen.
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Anisotropic media and the determination of subsurface velocity by the use of surface seismic reflection data
… is present at a point in a medium if the seismic velocity in one direction in general differs from that in another direction. The problems associated with the determination of subsurface velocity in anisotropic media by the use of surface seismic reflection data are analyzed. Previous …
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Analysis of seismic reflection data over the Sanford Triassic Basin, Chatham and Lee Counties, North Carolina
Approximately 9.5 km of seismic reflection data over the western margin of the Sanford Triassic Basin in North Carolina were acquired by Chevron, Inc. in 1972. These data enabled a comparison of the relative effectiveness of dynamite and vibroseis sources to be made. A comparison of 3-fold and …
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Characterization of the Fraser fault, Southwestern British Columbia, and surrounding geology through reprocessing of seismic reflection data
Seismic reflection data were acquired in 1988 along a 70 km profile crossing the Fraser fault, a major dextral strike-slip boundary between the Eastern Coast and Inter-montane belts of the southern Canadian Cordillera. Preliminary processing by industry contract and subsequent interpretation …
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The geologic history of Lake of the Woods, Minnesota, reconstructed using seismic-reflection imaging and sediment core analysis
… Agassiz sediment accumulation.High-resolution seismic-reflection (CHIRP) data collected from the southern basin of LOTW reveal up to 28 m of stratified lacustrine sediment deposited on top of glacial diamicton and bedrock. Five seismic units (SU A-E) were identified and described based on their …
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Detection of a Landslide Glide Plane Using Seismic Reflection Methods: Investigation at Little Valley Landslide in Draper, Utah
… methods, in particular high-resolution seismic data, were used to provide a framework for interpreting the geotechnical observations. High-resolution seismic reflection data, seldom used in landslide investigations, were acquired and processed in order to image the basal or glide surface …
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