Bulletin of the Seismological Society of America
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Bulletin of the Seismological Society of America; October 1998; v. 88; no. 5; p. 1204-1211
© 1998 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Purser, J. L.
Right arrow Articles by Van Arsdale, R. B.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Structure of the Lake County uplift: New Madrid seismic zone

Jodi L. Purser and Roy B. Van Arsdale

Center for Earthquake Research and Information Department of Geological Sciences University of Memphis, Memphis, Tennessee 38152

Abstract

The central segment of the New Madrid seismic zone lies within a left step-over zone between two northeast-striking, right-lateral, strike-slip fault systems. Within this compressional step-over zone is the topographically and structurally high Lake County uplift, which includes the Tiptonville dome and Ridgely ridge. We believe these structures are a consequence of deformation in the hanging wall above the northwest-striking, southwest-dipping Reelfoot reverse fault. Reelfoot fault dips 73° from the surface to the top of the Precambrian at a depth of approximately 4 km. From 4 to 12 km depth, the fault dips 32° and is seismically active. Based on a fault-bend fold model, we believe that the Reelfoot fault becomes horizontal and aseismic at the top of the quartz brittle-ductile transition zone, at approximately 12 km depth. Our data indicate that the western margin of the Tiptonville dome-Ridgely ridge and the western margin of the Lake County uplift are bounded by east-dipping kink bands (backthrusts). Recent work suggests that the Reelfoot fault is responsible for the 7 February 1812, M 8 New Madrid earthquake. However, the Reelfoot fault has a surface area that is less than that necessary for an M 8 earthquake. A possible solution to this discrepancy between magnitude and fault plane area is that the associated backthrusts are seismogenic.




This article has been cited by other articles:


Home page
 GeosphereHome page
R. Csontos and R. Van Arsdale
New Madrid seismic zone fault geometry
Geosphere, October 1, 2008; 4(5): 802 - 813.
[Abstract] [Full Text] [PDF]

Home page
 GeosphereHome page
R. Csontos, R. Van Arsdale, R. Cox, and B. Waldron
Reelfoot rift and its impact on Quaternary deformation in the central Mississippi River valley
Geosphere, February 1, 2008; 4(1): 145 - 158.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society of America Special PapersHome page
R. Van Arsdale, R. Bresnahan, N. McCallister, and B. Waldron
Upland Complex of the central Mississippi River valley: Its origin, denudation, and possible role in reactivation of the New Madrid seismic zone
Geological Society of America Special Papers, January 1, 2007; 425(0): 177 - 192.
[Abstract] [Full Text] [PDF]

Home page
 Seismological Research LettersHome page
J. N. Baldwin, J. B. Harris, R. B. Van Arsdale, R. Givler, K. I. Kelson, J. L. Sexton, and M. Lake
Constraints on the Location of the Late Quaternary Reelfoot and New Madrid North Faults in the Northern New Madrid Seismic Zone, Central United States
Seismological Research Letters, November 1, 2005; 76(6): 772 - 789.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society of America BulletinHome page
M. J. Guccione, R. Marple, and W. J. Autin
Evidence for Holocene displacements on the Bootheel fault (lineament) in southeastern Missouri: Seismotectonic implications for the New Madrid region
Geological Society of America Bulletin, March 1, 2005; 117(3-4): 319 - 333.
[Abstract] [Full Text] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
Three-Dimensional Geometry of the Reelfoot Blind Thrust: Implications for Moment Release and Earthquake Magnitude in the New Madrid Seismic Zone
Bulletin of the Seismological Society of America, December 1, 2001; 91(6): 1563 - 1573.


Home page
 Geological Society of America BulletinHome page
R. T. Cox, R. B. Van Arsdale, and J. B. Harris
Identification of possible Quaternary deformation in the northeastern Mississippi Embayment using quantitative geomorphic analysis of drainage-basin asymmetry
Geological Society of America Bulletin, May 1, 2001; 113(5): 615 - 624.
[Abstract] [Full Text] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
Late Cretaceous and Cenozoic Geology of the New Madrid Seismic Zone
Bulletin of the Seismological Society of America, April 1, 2000; 90(2): 345 - 356.


Home page
 ScienceHome page
K. Mueller, J. Champion, M. Guccione, and K. Kelson
Fault Slip Rates in the Modern New Madrid Seismic Zone
Science, November 5, 1999; 286(5442): 1135 - 1138.
[Abstract] [Full Text]

Home page
 Bulletin of the Seismological Society of AmericaHome page
R. K. Mihills and R. B. Van Arsdale
Late Wisconsin to Holocene deformation in the New Madrid seismic zone
Bulletin of the Seismological Society of America, August 1, 1999; 89(4): 1019 - 1024.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1998 by the Seismological Society of America.