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Showing 1 to 20 of 62 for “"Seismic Reflection Data"”.
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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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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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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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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 reprocessing and extended interpretation of seismic reflection data recorded over the Hayesville-Fries thrust sheet in southwestern North Carolina
… Ultradeep Core Hole (ADCOH) southern Appalachian seismic reflection data was focused on improving the reflection imaging and hence interpretability of seismic signatures previously interpreted as duplexes created by thrust stacking of thin beds of Paleozoic shelf strata. The reprocessed data are …
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Water flow beneath past ice sheets
… surveys, high-resolution 3D seismic-reflection data, conventional 3D seismic-reflection data, and geotechnical information from boreholes, is used to investigate the flow of water beneath ice sheets which covered western Europe and more expansive regions of the Antarctic …
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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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Multiscale determination of in situ stress and fracture properties in reservoirs
… in reservoirs using borehole logs and surface seismic reflection data. The dissertation covers four subtopics. The first is the determination of horizontal stress magnitudes from measurements in a borehole. Two types of data used are stress-induced rock failures in the borehole, known as …
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Lacustrine Turbidites from Tropical African Lakes as Indicators of Hydrologic and Climatic Changes
… dated sediment cores, and high-resolution seismic reflection profiles from Lake Kivu in the East African Rift and Lake Bosumtwi in equatorial West Africa. A secondary focus of this dissertation is to image ancient turbidite systems of the Lake Albert rift in East Africa, using 2-D and 3-D …
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New technologies for unconventional reservoir characterization: Seismic inversion, focal-time estimation, and signal processing to improve reservoir imaging
Seismic data, comprising both passively and actively recorded data, have long been used for resource evaluation and geohazard assessments. Unconventional resource extraction, such as Alberta’s Duvernay play, requires a multifaceted approach to optimize reservoir development and to mitigate …
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Structure and Tectonics of the Offshore Region Close to Kayak Island from Geophysical Information
… the offshore area close to Kayak Island. Seismic reflection data collected in 1976 in the offshore region of Kayak Island in the Gulf of Alaska were reprocessed in order to improve the quality of the signal by applying seismic data processing techniques that were not available at the time …
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INTEGRATING GEOPHYSICAL METHODS TO STUDY SUBDUCTION ZONE PROPERTIES, ACTIVE FAULTING IN A VOLCANIC FIELD, AND VOLCANO LANDSLIDE HAZARDS
In this dissertation, I integrate geophysical data to study the upper crustal structure of subduction zones and its influence on earthquake, volcanic, and landslide hazards from the trench to the volcanic arc. Specifically, I use seismic reflection data, earthquake focal mechanisms, magnetics, and …
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Late Neogene Uplift of the Fairweather Ground on the Basis of Bathymetric and Seismic Data from the Gulf of Alaska
… basement in the Gulf of Alaska are the focus for seismic interpretation using public domain seismic reflection data. The late Tertiary and early Quaternary sections of the Yakataga Formation record a glacial/ interglacial climate change sequence with increasing rates of sedimentation (175 meters …
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