Abstract
We used multicomponent seismic reflection/refraction data to determine seismic velocities, Poisson's ratios and geometries of shallow subsurface structures across the Cheyenne Belt, an Archean-Proterozoic boundary in southeastern Wyoming. The travel-times of P-wave first arrivals were inverted to obtain a model of both P-wave velocity and subsurface geometry. Since S-wave data quality was inferior to that of the P-wave data and S-wave ray coverage of the subsurface was discontinuous, we proposed a method to estimate Poisson's ratio using SiO2 concentration and the average atomic weight (AAW) of a formation with known mineral and oxide compositions. Subsequently, the final P-wave velocity model was converted into an initial S-wave model using Poisson's ratios estimated by this method. The S-wave data were inverted for velocities only, keeping the subsurface geometry derived from P-wave inversion constant. The inversion of P- and S-wave travel times resulted in a shallow subsurface model of rock properties, which was interpreted based on surface geology and Poisson's ratio variations to provide a near-surface geological structure model.
| Original language | English (US) |
|---|---|
| State | Published - Jan 1 2003 |
| Event | 2003 Society of Exploration Geophysicists Annual Meeting, SEG 2003 - Dallas, United States Duration: Oct 26 2003 → Oct 31 2003 |
Other
| Other | 2003 Society of Exploration Geophysicists Annual Meeting, SEG 2003 |
|---|---|
| Country | United States |
| City | Dallas |
| Period | 10/26/03 → 10/31/03 |
Fingerprint
ASJC Scopus subject areas
- Geophysics
Cite this
P- And S-wave seismic modeling of the shallow subsurface across the Cheyenne belt in the Sierra Madre Mountains. / Shoshitaishvili, Elena; Johnson, Roy A.
2003. Paper presented at 2003 Society of Exploration Geophysicists Annual Meeting, SEG 2003, Dallas, United States.Research output: Contribution to conference › Paper
}
TY - CONF
T1 - P- And S-wave seismic modeling of the shallow subsurface across the Cheyenne belt in the Sierra Madre Mountains
AU - Shoshitaishvili, Elena
AU - Johnson, Roy A
PY - 2003/1/1
Y1 - 2003/1/1
N2 - We used multicomponent seismic reflection/refraction data to determine seismic velocities, Poisson's ratios and geometries of shallow subsurface structures across the Cheyenne Belt, an Archean-Proterozoic boundary in southeastern Wyoming. The travel-times of P-wave first arrivals were inverted to obtain a model of both P-wave velocity and subsurface geometry. Since S-wave data quality was inferior to that of the P-wave data and S-wave ray coverage of the subsurface was discontinuous, we proposed a method to estimate Poisson's ratio using SiO2 concentration and the average atomic weight (AAW) of a formation with known mineral and oxide compositions. Subsequently, the final P-wave velocity model was converted into an initial S-wave model using Poisson's ratios estimated by this method. The S-wave data were inverted for velocities only, keeping the subsurface geometry derived from P-wave inversion constant. The inversion of P- and S-wave travel times resulted in a shallow subsurface model of rock properties, which was interpreted based on surface geology and Poisson's ratio variations to provide a near-surface geological structure model.
AB - We used multicomponent seismic reflection/refraction data to determine seismic velocities, Poisson's ratios and geometries of shallow subsurface structures across the Cheyenne Belt, an Archean-Proterozoic boundary in southeastern Wyoming. The travel-times of P-wave first arrivals were inverted to obtain a model of both P-wave velocity and subsurface geometry. Since S-wave data quality was inferior to that of the P-wave data and S-wave ray coverage of the subsurface was discontinuous, we proposed a method to estimate Poisson's ratio using SiO2 concentration and the average atomic weight (AAW) of a formation with known mineral and oxide compositions. Subsequently, the final P-wave velocity model was converted into an initial S-wave model using Poisson's ratios estimated by this method. The S-wave data were inverted for velocities only, keeping the subsurface geometry derived from P-wave inversion constant. The inversion of P- and S-wave travel times resulted in a shallow subsurface model of rock properties, which was interpreted based on surface geology and Poisson's ratio variations to provide a near-surface geological structure model.
UR - http://www.scopus.com/inward/record.url?scp=85056132226&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85056132226&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85056132226
ER -