Chapter 6 The Rio Grande Rift

Baldridge, W. Scott; Keller, G. Randy; Haak, V.; Wendlandt, Eric; Jiracek, George R.; Olsen, Kenneth H.

doi:10.1016/s0419-0254(06)80014-5

Cited by 45 publications

(23 citation statements)

References 156 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prior studies about the rift have concluded that low angle normal faults were formed due to tilting of initially high angle faults (Seager, 1981;Kelley and Matheny, 1983;Lewis and Baldridge, 1994). These prior studies inferred that the thermal structure of the Rio Grande rift was fundamentally different from that one which is present today, leading to a shallow brittle ductile transition producing low angle faults (Morgan and Golombek, 1984;Keller et al, 1990;Baldridge et al, 1995). The presence of young low angle normal faults challenges this view.…”

Section: Discussionmentioning

confidence: 99%

“…The first phase of deformation occurred from 30 to 18 Ma, forming shallow basins bounded by low-angle normal faults. This period is associated with volcanism and is attributed to thinning of hot lithosphere with a shallow brittle-ductile transition (Morgan and Golombeck, 1984;Keller et al, 1990;Baldridge et al, 1995). Such low angle normal faults are only known from isolated areas, and their nature is still a point of debate.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Paleostress and Geometric Analysis of the Southern Rio Grande Rift in the Northern Chihuahua Trough: Franklin and Potrillos Mountains as examples

Carciumaru¹,

Ortega²

2017

BSGM

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Paleostress and Geometric Analysis of the Southern Rio Grande Rift in the Northern Chihuahua Trough: Franklin and Potrillos Mountains as examples

Carciumaru¹,

Ortega²

2017

BSGM

View full text Add to dashboard Cite

“…Compared to the Rio Grande rift, adjacent in the northeast (Figure 1), this region has lower heat flow and a thicker, less extended crust [Keller et al, 1990;Baldridge et al, 1995;Keller, 2004].…”

Section: Tectonic Settingmentioning

confidence: 99%

Rupture of the Pitáycachi Fault in the 1887M_w7.5 Sonora, Mexico earthquake (southern Basin‐and‐Range Province): Rupture kinematics and epicenter inferred from rupture branching patterns

Suter

2015

JGR Solid Earth

View full text Add to dashboard Cite

During the 3 May 1887 M w 7.5 Sonora earthquake (surface rupture end-to-end length: 101.8 km), an array of three north-south striking Basin-and-Range Province faults (from north to south Pitáycachi, Teras, and Otates) slipped sequentially along the western margin of the Sierra Madre Occidental Plateau. This detailed field survey of the 1887 earthquake rupture zone along the Pitáycachi fault includes mapping the rupture scarp and measurements of surface deformation. The surface rupture has an endpoint-to-endpoint length of ≥41.0 km, dips~70°W, and is characterized by normal left-lateral extension. The maximum surface offset is 487 cm and the mean offset 260 cm. The rupture trace shows a complex pattern of second-order segmentation. However, this segmentation is not expressed in the 1887 along-rupture surface offset profile, which indicates that the secondary segments are linked at depth into a single coherent fault surface. The Pitáycachi surface rupture shows a well-developed bipolar branching pattern suggesting that the rupture originated in its central part, where the polarity of the rupture bifurcations changes. Most likely the rupture first propagated bilaterally along the Pitáycachi fault. The southern rupture front likely jumped across a step over to the Teras fault and from there across a major relay zone to the Otates fault. Branching probably resulted from the lateral propagation of the rupture after breaching the seismogenic part of the crust, given that the much shorter ruptures of the Otates and Teras segments did not develop branches.

show abstract

“…Minor episodic extension and mafic volcanism associated with the Rio Grande rift system occurred following the main pulse of Oligocene volcanism. Rifting is expressed in the CRM region by a narrow series of asymmetric grabens in the San Luis, Upper Arkansas, and Blue River valleys (Figure 1), and by diffuse extensional faulting that extends into northern Colorado and southern Wyoming [Baldridge et al, 1995;Berglund et al, 2012;Ingersoll, 2001;Keller et al, 1991;Landman and Flowers, 2013;Tweto, 1979].…”

Section: Geologic Settingmentioning

confidence: 99%

A rootless rockies—Support and lithospheric structure of the Colorado Rocky Mountains inferred from CREST and TA seismic data

Hansen

Dueker

Stachnik

et al. 2013

Geochem Geophys Geosyst

View full text Add to dashboard Cite

[1] Support for the Colorado high topography is resolved using seismic data from the Colorado Rocky Mountain (CRM) Experiment and Seismic Transects. The average crustal thickness, derived from P wave receiver function imaging, is 48 km. However, a negative correlation between Moho depth and elevation is observed, which negates Airy-Heiskanen isostasy. Shallow Moho (<45 km depth) is found beneath some of the highest elevations, and therefore, the CRM are rootless. Deep Moho (45-51 km) regions indicate structure inherited from the Proterozoic assembly of the continent. Shear wave velocities from surface wave tomography are mapped to density employing empirical velocity-to-density relations in the crust and mantle temperature modeling. Predicted elastic plate flexure and gravity fields derived from the density model agree with observed long-wavelength topography and Bouguer gravity. Therefore, lowdensity crust and mantle are sufficient to support much of the CRM topography. Centers of Oligocene volcanism, e.g., the San Juan Mountains, display reduced crustal thicknesses and lowest average crustal velocities, suggesting that magmatic modification strongly influenced modern lithospheric structure and topography. Mantle velocities span 4.02-4.64 km/s at 73-123 km depth, and peak lateral temperature variations of 600 C are inferred. S wave receiver function imaging suggests that the lithosphereasthenosphere boundary is 100-150 km deep beneath the Colorado Plateau, and 150-200 km deep beneath the High Plains. A region of negative arrivals beneath the CRM above 100 km depth correlates with low mantle velocities and is interpreted as thermally modified/metasomatized lithosphere resulting from Cenozoic volcanism.

show abstract

Chapter 6 The Rio Grande Rift

Cited by 45 publications

References 156 publications

Paleostress and Geometric Analysis of the Southern Rio Grande Rift in the Northern Chihuahua Trough: Franklin and Potrillos Mountains as examples

Paleostress and Geometric Analysis of the Southern Rio Grande Rift in the Northern Chihuahua Trough: Franklin and Potrillos Mountains as examples

Rupture of the Pitáycachi Fault in the 1887M_w7.5 Sonora, Mexico earthquake (southern Basin‐and‐Range Province): Rupture kinematics and epicenter inferred from rupture branching patterns

A rootless rockies—Support and lithospheric structure of the Colorado Rocky Mountains inferred from CREST and TA seismic data

Contact Info

Product

Resources

About

Chapter 6 The Rio Grande Rift

Cited by 45 publications

References 156 publications

Paleostress and Geometric Analysis of the Southern Rio Grande Rift in the Northern Chihuahua Trough: Franklin and Potrillos Mountains as examples

Paleostress and Geometric Analysis of the Southern Rio Grande Rift in the Northern Chihuahua Trough: Franklin and Potrillos Mountains as examples

Rupture of the Pitáycachi Fault in the 1887Mw7.5 Sonora, Mexico earthquake (southern Basin‐and‐Range Province): Rupture kinematics and epicenter inferred from rupture branching patterns

A rootless rockies—Support and lithospheric structure of the Colorado Rocky Mountains inferred from CREST and TA seismic data

Contact Info

Product

Resources

About

Rupture of the Pitáycachi Fault in the 1887M_w7.5 Sonora, Mexico earthquake (southern Basin‐and‐Range Province): Rupture kinematics and epicenter inferred from rupture branching patterns