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Evaluation of deep sediment velocity structure in the New Madrid seismic zone

Jordi Julia, Robert B. Herrmann, Charles J. Ammon and Aybige Akinci
Evaluation of deep sediment velocity structure in the New Madrid seismic zone
Bulletin of the Seismological Society of America (February 2004) 94 (1): 334-340

Abstract

Detailed knowledge of the physical properties of the sediments filling the Mississippi Embayment has proven critical to both unravel the tectonic frame-work operating in the region and assess the seismic hazards posed by the New Madrid Seismic Zone. In this article we show that independent geotechnical estimates for P-and S-wave velocities are compatible with a sedimentary model of K-feldspar clasts embeded in water, and we test its validity by modeling receiver functions at a number of broadband stations. By constraining the bulk sediment thicknesses beneath each station from independent reflection profiling estimates, we have been able to recover the depth to the top of the Cretaceous from the receiver function data at individual stations. Our receiver function modeling thus provides confidence in the velocity and density structures extrapolated from in situ geotechnical measurements in the Upper Mississippi Embayment.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 94
Serial Issue: 1
Title: Evaluation of deep sediment velocity structure in the New Madrid seismic zone
Affiliation: Pennsylvania State University, Department of Geosciences, University Park, PA, United States
Pages: 334-340
Published: 200402
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 24
Accession Number: 2004-038911
Categories: Engineering geologySeismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N33°00'00" - N36°30'00", W94°40'00" - W89°40'00"
N36°00'00" - N40°34'60", W95°45'00" - W89°04'60"
N35°00'00" - N36°45'00", W90°15'00" - W81°40'00"
Secondary Affiliation: Saint Louis University, USA, United StatesIstituto Nazionale di Geofisica e Vulcanologia, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200411
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