Details

Autor(en) / Beteiligte

• Hurich, C. A
• Meissner, Rolf
• Brown, Larry
• Franke, Wolfgang
• Seifert, Friedrich
• Dürbaum, Hans‐Jürgen
• Fuchs, Karl

Titel

Source‐Generated Noise in Marine Seismic Profiles: The Limits of Reflection Detectability in the Upper Crust

Ist Teil von

• Continental Lithosphere: Deep Seismic Reflections, 1991, p.443-450

Ort / Verlag

Washington, D. C: American Geophysical Union

Erscheinungsjahr

1991

Link zum Volltext

Quelle

Wiley Online Library All Obooks

Beschreibungen/Notizen

• Experiments demonstrate that source‐generated noise in marine seismic profiles may mask reflections in the upper crystalline crust and limit the completeness and reliability of some deep seismic data. The level of source‐generated noise depends on the size of the acoustic contrasts in the near‐surface geology. Areas in which source‐generated noise is important are not limited to the well‐known hard‐bottom situations and may be common in marginal platform areas such as those of northwest Europe. The standard processing sequence commonly applied to marine deep seismic data has limited effectiveness for attenuating source‐generated noise. In the experiments, reflections from acoustic impedance contrasts commonly encountered in crystalline rocks (0.025–0.10) are unimaged or poorly imaged in the first 6 to 8 km of the crust but are better imaged with increasing depth. These experiments suggest that the commonly observed transparent upper crust and onset of reflections in the middle crust may be the result of limitations of the seismic reflection technique rather than crustal geology.