Deep seismic imaging of the eastern Nankai trough, Japan, from multifold ocean bottom seismometer data by combined travel time tomography and prestack depth migration
نویسندگان
چکیده
منابع مشابه
Depth Characterization of Shallow Aquifers with Seismic Reflection, Part II—Prestack Depth Migration and Field Examples
It is common in shallow seismic studies for the compressional-wave velocity in unconsolidated sediments to increase by a factor of four or more at the transition from dry or partial water saturation to full saturation. Under these conditions, conventional NMO velocity analysis fails and leads to large depth and layer thickness estimates if the Dix equation is assumed valid. Prestack depth migra...
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Zhen Liu,1 Susan Owen,1 Danan Dong,1 Paul Lundgren,1 Frank Webb,1 Eric Hetland3 and Mark Simons2 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. E-mail: [email protected] 2Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA 3Department of Geological Sciences, University of Michigan, Ann Arbor, MI 481...
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in exploration seismology, migration refers to a multi-channel processing step that attempts to spatially re-position events and improve focusing. before migration, seismic data is usually displayed with traces plotted at the surface location of the receivers and with a vertical time axis. this means that dipping reflections are systematically mispositioned in the lateral coordinate and the ver...
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Diversity of Bacteria and Archaea was studied in deep marine sediments by PCR amplification and sequence analysis of 16S rRNA and methyl co-enzyme M reductase (mcrA) genes. Samples analysed were from Ocean Drilling Program (ODP) Leg 190 deep subsurface sediments at three sites spanning the Nankai Trough in the Pacific Ocean off Shikoku Island, Japan. DNA was amplified, from three depths at site...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2004
ISSN: 0148-0227
DOI: 10.1029/2003jb002689