In:
Geochemistry, Geophysics, Geosystems, American Geophysical Union (AGU), Vol. 9, No. 7 ( 2008-07)
Abstract:
The potential of a 3‐D vertical seismic profile (VSP) to improve resolution of seismogenic plate interfaces was explored with synthetic modeling. The 3‐D VSP modeled is at a proposed site for a 1 to 1.5 km deep open hole that provides background for riser drilling. Three‐dimensional VSP images could resolve 30–60 m spaced reflective horizons in a Costa Rican subduction zone. It can record a great amount of high‐fidelity S wave data to invert for physical properties, directions of strain, and pore pressure above and below the plate interface fault. A 6 km × 12 km grid of shots with a surface ship will illuminate a ∼4 km × 7 km area of the plate interface fault zone with a high data density. Acquisition adds 5 to 9 days to drill ship time on site and a shooting ship. Seismic image resolution falls between that of borehole information and 3‐D surface ship seismic images. A multiple‐kilometer 3‐D volume of high‐fidelity S wave data is an exceptional addition not available with other techniques.
Type of Medium:
Online Resource
ISSN:
1525-2027
,
1525-2027
DOI:
10.1029/2008GC002013
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
2008
detail.hit.zdb_id:
2027201-7
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