Crustal structure in the eastern Colorado Plateaus Provence from seismic-refraction measurements

Roller, John C.

doi:10.3133/70040815

Cited by 27 publications

(54 citation statements)

References 2 publications

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“…Index map of previous seismic studies in the region. Sources for refraction data: a, this study; b, Cook and others (1979); c, Toppozada and Sanford (1976); d, Olsen and others (1979); e, Jaksha (1982); f, Stewart and Pakiser (1962); g, Roller (1965); h, Gish and others (1981); i, Sinno and others (1986). Numbers in parentheses are crustal thicknesses in kilometers.…”

Section: Geophysical Frameworkmentioning

confidence: 96%

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Crustal structure of the western margin of the Rio Grande rift and Mogollon-Datil volcanic field, southwestern New Mexico and southeastern Arizona

Schneider¹,

Keller²

1994

Basins of the Rio Grande Rift: Structure, Stratigraphy, and Tectonic Setting

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The southeastern margin of the Colorado Plateau (CP) lies in southwestern New Mexico and southeastern Arizona. It is defined as the boundary between the CP, the Rio Grande rift, and the Basin and Range (BRP) provinces. Along its western and southern margins, the CP is physically distinguishable from the BRP by major escarpments. Because of a thick cover of volcanic material associated with the Mogollon-Datil volcanic field (MDVF), no such demarcation exists in the study area. To accurately determine lithospheric structure in this area, two seismic refraction lines that intersect within the MDVF were studied. In addition, gravity data along these lines were simultaneously analyzed. Based on these data, velocity and density profiles were created via an iterative forward modeling processes. Major crustal boundaries for each paired gravity/refraction profile were constrained to agree at the point of intersection and with other geological and geophysical control. Structurally, the CP margin appears as an abrupt northward deepening of the Moho just south of Datil, New Mexico. This lies beneath a major low density-low velocity upper crustal body, interpreted to be a plutonic complex approximately 230 by 150 by 6 km. It is very likely that this complex provided the source material for the MDVF. Stoping appears to be the vehicle for emplacement of this body, implying a major crustal reorganization in middle Tertiary time.

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Section: Geophysical Frameworkmentioning

confidence: 96%

“…The base of the crust (Moho) under the CP has been estimated by seismic refraction experiments and surface wave studies to be 40 to 45 km below sea level (Roller, 1965;Toppozada and Sanford, 1976;Keller and others, 1979 Figure 2. Index map of previous seismic studies in the region.…”

Section: Geophysical Frameworkmentioning

confidence: 99%

Crustal structure of the western margin of the Rio Grande rift and Mogollon-Datil volcanic field, southwestern New Mexico and southeastern Arizona

Schneider¹,

Keller²

1994

Basins of the Rio Grande Rift: Structure, Stratigraphy, and Tectonic Setting

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“…The Colorado Plateau (Roller, 1965) shares several characteristics with the Arabian Shield. The crustal thickness (MO km) and average upper and lower crustal velocities (6.2 and 6.8 km/s) are comparable^ however, the upper crust of the Colorado Plateau is 5 km thicker than the 20-km average found in Saudi Arabia.…”

Section: Western Shield Margin and The Red Sea Rift And Shelfmentioning

confidence: 99%

Saudi Arabian seismic deep-refraction profiles; final project report

Healy¹,

Mooney²,

Blank³

et al. 1983

Open-File Report

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“…Three layer models suggest a fast (Vs 4 kin/s) lower crust for the CP. Synthetic phase velocity curves were calculated from a suite of published CP velocity models, and the model of Roller [1965] is found to offer the best fit to our phase velocity measurements. km depth interval [Alsina and Snieder, 1995].…”

mentioning

confidence: 99%

Contrasting lithospheric structure between the Colorado Plateau and Great Basin: Initial results from Colorado Plateau ‐ Great Basin PASSCAL Experiment

Sheehan

Jones

Savage

et al. 1997

Geophysical Research Letters

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Crustal structure in the eastern Colorado Plateaus Provence from seismic-refraction measurements

Cited by 27 publications

References 2 publications

Crustal structure of the western margin of the Rio Grande rift and Mogollon-Datil volcanic field, southwestern New Mexico and southeastern Arizona

Crustal structure of the western margin of the Rio Grande rift and Mogollon-Datil volcanic field, southwestern New Mexico and southeastern Arizona

Saudi Arabian seismic deep-refraction profiles; final project report

Contrasting lithospheric structure between the Colorado Plateau and Great Basin: Initial results from Colorado Plateau ‐ Great Basin PASSCAL Experiment

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