Late Cretaceous and Cenozoic Geology of the New Madrid Seismic Zone

Arsdale, Roy B. Van; TenBrink, Robin K.

doi:10.1785/0119990088

Cited by 65 publications

(37 citation statements)

References 43 publications

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“…We suggest that the Caruthersville dome was uplifted relative to the rest of the Pascola arch at a transpressional intersection of these fabrics. This model suggests that the Caruthersville dome is a predecessor to the Lake County uplift (Figure 18), which occurs over the transpressive bend in the present-day New Madrid seismic zone (Russ, 1982;Van Arsdale and TenBrink, 2000). An implication is that Holocene deformation and seismicity at New Madrid is occurring on structures that have a history of similar movement as far back as the late Paleozoic.…”

Section: Southern Tectonic Domainmentioning

confidence: 99%

Tectonic Framework of the Southwestern Margin of the Illinois Basin and Its Influence on Neotectonism and Seismicity

Harrison

Schultz

2002

Seismological Research Letters

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Section: Southern Tectonic Domainmentioning

confidence: 99%

Tectonic Framework of the Southwestern Margin of the Illinois Basin and Its Influence on Neotectonism and Seismicity

Harrison

Schultz

2002

Seismological Research Letters

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“…The main constraints on total deformation within the NMSZ are 15 m of post-Eocene uplift within the Reelfoot fault zone (Van Arsdale and TenBrink, 2000), the occurrence of three slip events along the Reelfoot fault over the past 2400 yr (Kelson et al, 1996), and the occurrence of three large strike-slip events of comparable size on the SW arm since 800 A.D. (and possibly two or three additional strike-slip events since 4035 B.C.) (Tuttle and Schweig, 1995).…”

Section: Discussionmentioning

confidence: 99%

Sinking Mafic Body in a Reactivated Lower Crust: A Mechanism for Stress Concentration at the New Madrid Seismic Zone

Pollitz

Kellogg

Bürgmann

2001

Bulletin of the Seismological Society of America

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We propose a geodynamic model for stress concentration in the New Madrid seismic zone (NMSZ). The model postulates that a high-density (mafic) body situated in the deep crust directly beneath the most seismically active part of the NMSZ began sinking several thousands of years ago when the lower crust was suddenly weakened. Based on the fact that deformation rates in the NMSZ have accelerated over the past 9 k.y., we envision the source of this perturbation to be related to the last North American deglaciation. Excess mass of the mafic body exerts a downward pull on the elastic upper crust, leading to a cycle of primary thrust faulting with secondary strike-slip faulting, after which continued sinking of the mafic body reloads the upper crust and renews the process. This model is consistent with the youth of activity, the generation of a sequence of earthquakes, and the velocity evolution during interseismic periods, which depend upon the density contrast of the mafic body with respect to the surrounding crust, its volume, and the viscosity of the lower crust.

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“…According to Liu et al, (1997), the P-wave velocity (Figure 4) increases abruptly across this layer, giving rise to the first refracted energy observed in Figure 3A. In the Memphis area, the Pliocene strata directly overlies the confining unit (Eocene and Oligocene) and Miocene deposits are missing, indicating that after the deposition of the Jackson formation (the upper stratigraphic element of the confining unit), the area may have undergone significant erosion within the fluvial depositional system (Van Arsdale and TenBrink, 2000), and that erosional features (e.g. paleochannels) might be preserved at the top of the confining unit.…”

Section: Applicationmentioning

confidence: 97%