Imaging basin structure with teleseismic virtual source reflection profiles

We demonstrate a case of using teleseisms recorded on single‐channel high‐frequency geophones to image upper crustal structure around the Bighorn Mountains of north‐central Wyoming, USA. Our approach produces images that are analogous to those from a low frequency version of conventional active sour...

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Bibliographic Details
Published in:Geophysical research letters 2012-01, Vol.39 (2), p.n/a
Main Authors: Yang, Zhaohui, Sheehan, Anne F., Yeck, William L., Miller, Kate C., Erslev, Eric A., Worthington, Lindsay L., Harder, Steven H.
Format: Article
Language:English
Subjects:
array imaging
Basins
Bighorn
Earth sciences
Earth, ocean, space
Earthquakes
Exact sciences and technology
Geophysics
Imaging
Mountains
receiver function
Recording
Reflection
sedimentary basin
Seismic activity
Seismic phenomena
Seismology
teleseismic
virtual source
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Summary:We demonstrate a case of using teleseisms recorded on single‐channel high‐frequency geophones to image upper crustal structure around the Bighorn Mountains of north‐central Wyoming, USA. Our approach produces images that are analogous to those from a low frequency version of conventional active source seismic reflection profiles except that wave fields from distant earthquakes are used as sources. After the source wavelet is removed from the seismograms, a distinct phase,PpPdp, is evident in the resultant record. After depth conversion, we show that this phase correlates well with the top of the Madison Formation under the Powder River and Bighorn Basins that flank the Bighorn Mountains. In addition, we combine the phases PpPdpfrom single‐channel geophone recordings andPsfrom three‐component recordings to constrain the averageVp/Vs ratio for the sedimentary strata. Key Points Successfully constructing teleseismic virtual source reflection (TVR) profiles Vp/Vs ratio can be estimated by joining phases PpPdp and Ps TVR technique give complementary results to active source experiments
ISSN:0094-8276
1944-8007
DOI:10.1029/2011GL050035