Rio Grande Rift in Southern New Mexico, West Texas, and Northern Chihuahua

2013 ◽  
pp. 87-106 ◽  
Author(s):  
William R. Seager ◽  
Paul Morgan
Keyword(s):  
New Mexico ◽  
Rio Grande ◽  
Rio Grande Rift ◽  
West Texas

A SHALLOW RIFT BASIN SEGMENTED IN SPACE AND TIME: THE SOUTHERN SAN LUIS BASIN, RIO GRANDE RIFT, NORTHERN NEW MEXICO

2019 ◽  
Author(s):  
Benjamin J. Drenth ◽  
◽  
V.J.S. Grauch ◽  
Kenzie J. Turner ◽  
Brian D. Rodriguez ◽  
...  
Keyword(s):  
New Mexico ◽  
Rio Grande ◽  
Rio Grande Rift ◽  
Rift Basin ◽  
Space And Time ◽  
San Luis

Earthquake Hazard Estimation in Areas of Low Historical Seismicity: A Focus on the Northern Rio Grande Rift, Colorado and New Mexico

1990 ◽  
Vol 6 (4) ◽  
pp. 657-680 ◽  
Author(s):  
Charles E. Glass
Keyword(s):  
New Mexico ◽  
Gaussian Model ◽  
Rio Grande ◽  
Earthquake Hazard ◽  
Weibull Model ◽  
Historical Seismicity ◽  
Rio Grande Rift ◽  
Earthquake Activity ◽  
Sangre De Cristo ◽  
Northern Rio Grande

Estimates of the probability of future earthquake activity are difficult to make in areas where historical seismicity may be low or absent, but where young fault scarps attest to recent or ongoing tectonism. Three non-Poisson models, a Weibull model, a Gaussian model and a lognormal model, are used to estimate the earthquake hazard for one such area, the northern Rio Grande Rift. This portion of the Rio Grande Rift displays numerous Holocene faults attesting to ongoing tectonism, but displays essentially no historical seismicity. The earthquake hazard for the Sangre de Cristo fault zone from Taos, New Mexico to Salida, Colorado calculated using these models is remarkably consistent (probability of at least one Mo = 7 earthquake in the next 50 years ∼ 2.5 × 10−3), with increased hazard for the Sangre de Cristo fault in north San Luis Valley (∼5.0×10−3) and near Taos (∼1.0×10−2) due to the long holding times along these segments.

Crustal structure in central New Mexico interpreted from the gasbuggy explosion

1976 ◽  
Vol 66 (3) ◽  
pp. 877-886
Author(s):  
Tousson R. Toppozada ◽  
Allan R. Sanford
Keyword(s):  
New Mexico ◽  
Upper Mantle ◽  
Rio Grande ◽  
Seismic Profile ◽  
Rio Grande Rift ◽  
Additional Information ◽  
Crustal Velocity ◽  
Crustal Model ◽  
Mantle Velocity ◽  
Record Section

abstract Interpretation of a seismic profile extending 548 km southward from the GASBUGGY nuclear test of December 10, 1967 resulted in a crustal model for central New Mexico. The crust is 39.9 km thick below the Paleozoic “basement”. It consists of an upper crust 18.6 km thick having P velocity 6.15 km/sec, and a lower crust 21.3 km thick having P velocity 6.5 km/sec. The apparent upper mantle velocity is 8.12 km/sec. This model applies near the crossover distance, 50 km west of Albuquerque. Additional information from earthquakes and explosions suggests that the upper crustal velocity drops to 5.8 km/sec in the Rio Grande rift, and that the true upper mantle velocity is 7.9 km/sec. The low upper crustal velocity in the Rio Grande rift can be detected on the record section of the GASBUGGY profile.

Sign in / Sign up

Export Citation Format

Share Document