Zobrazeno 1 - 10
of 61
pro vyhledávání: '"F. Theilen"'
Publikováno v:
Continental Shelf Research. 26:2469-2483
This study was performed to investigate gas formation and gas saturation conditions related to acoustic turbidity in shallow (∼40 m deep) marine basins. The Arkona Basin, Baltic Sea, with its organic-rich fine-grained surface sediment provides an i
Publikováno v:
Marine Geophysical Researches. 26:207-224
Gas in sediments has become an important subject of research for various reasons. It affects large areas of the sea floor where it is mainly produced. Gas and gas migration have a strong impact on the environmental situation as well as on sea floor s
Publikováno v:
Marine Geophysical Researches. 26:287-315
Dispersive Scholte waves as well as acoustic guided waves have been excited by surface towed airguns and recorded with stationary receivers (OBS) and a towed hydrophone array. The inversion of the recorded wavefield spectra was adapted to the data fr
Publikováno v:
GEOPHYSICS. 69:330-344
Reliable models of in‐situ shear‐wave velocities of shallow‐water marine sediments are important for geotechnical applications, lithological sediment characterization, and seismic exploration studies. We infer the 2D shear‐wave velocity struc
Publikováno v:
Journal of Volcanology and Geothermal Research. 128:15-29
Near the seamount Holl in the Tjornes Fracture Zone (TFZ) north of Iceland two anomalies of high seismic b-values have been found in a depth shallower than 10 km. According to the results of similar b-value anomalies beneath volcanic edifices such as
Publikováno v:
Geophysical Prospecting. 50:517-526
The use of Boomer sources for 3D seismic imaging of shallow marine structures was investigated in a feasibility study. Boomers show sufficient stability to be used in multichannel seismic surveys. The acquisition of a high-frequency, densely sampled
Publikováno v:
Earth and Planetary Science Letters. 193:409-421
The results of a combined geophysical and geochemical research program are presented that focused on Grimsey hydrothermal field (GHF) which is located at 66 degrees 35'30"N, 17 degrees 39'30"W east of the island of Grimsey in the Tjornes Fracture Zon
Publikováno v:
Journal of Applied Geophysics. 48:1-10
The main purpose of the present study is to investigate the use of natural gamma activity as a measure of geotechnical properties such as density, porosity, water content and shear strength of near surface marine sediments. Natural gamma activity dat
Publikováno v:
The Leading Edge. 20:854-857
Ocean island systems such as Hawaii and the Canaries have been built by large volumes of magma intrusions and by lava extrusions based on intraplate volcanism. The Canary Islands, off the Northwest African continental margin (Figure 1), were formed b
Autor:
F. Theilen, Arthur Ayres
Publikováno v:
Geophysical Prospecting. 49:120-127
The attenuation of compressional and shear waves (Q(p) and Q(s)) has been studied by several authors but most of these investigations were performed on deep buried reservoir sandstones in order to distinguish between gas and condensate reservoirs and