Publication Date:
2017-04-04
Description:
Detailed knowledge of the physical properties of the sediments filling
the Mississippi Embayment has proven critical to both unravel the tectonic framework
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 Pand
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.
Description:
Published
Description:
334-340
Description:
JCR Journal
Description:
reserved
Keywords:
receiver functions, mississipi embayment
;
velocity tructure
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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