Delineating a shallow fault zone and dipping bed rock strata using multichannal analysis of surface waves with a land streamer
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Abstract
The multichannel analysis of surface waves (MASW) seismic method was used to delineate a fault zone and gently dipping sedimentary bedrock at a site overlain by several meters of regolith. Seismic data were collected rapidly and inexpensively using a towed 30-channel land streamer and a rubberband-accelerated weight-drop seismic source. Data processed using the MASW method imaged the subsurface to a depth of about 20m20m and allowed detection of the overburden, gross bedding features, and fault zone. The fault zone was characterized by a lower shear-wave velocity (Vs)(Vs) than the competent bedrock, consistent with a large-scale fault, secondary fractures, and in-situ weathering. The MASW 2D VsVs section was further interpreted to identify dipping beds consistent with local geologic mapping. Mapping of shallow-fault zones and dipping sedimentary rock substantially extends the applications of the MASW method.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Delineating a shallow fault zone and dipping bed rock strata using multichannal analysis of surface waves with a land streamer |
| Series title | Geophysics |
| DOI | 10.1190/1.2227521 |
| Volume | 71 |
| Issue | 5 |
| Year Published | 2006 |
| Language | English |
| Publisher | Society of Exploration Geophysicists |
| Contributing office(s) | Office of Ground Water, Toxic Substances Hydrology Program |
| Description | 4 p. |
| First page | A39 |
| Last page | A42 |
| Country | United States |
| State | New Jersey |
| City | West Trenton |
| Google Analytic Metrics | Metrics page |