scholarly journals 60 k.y. record of extension across the western boundary of the Basin and Range province: Estimate of slip rates from offset shoreline terraces and a catastrophic slide beneath Lake Tahoe: Comment and Reply: REPLY

Geology ◽  
2006 ◽  
Vol 34 (1) ◽  
pp. e115-e116 ◽  
Author(s):  
G.M. Kent ◽  
J.M. Babcock ◽  
N.W. Driscoll ◽  
A.J. Harding ◽  
J.A. Dingler ◽  
...  
Keyword(s):  
Lake Tahoe ◽  
Basin And Range ◽  
Western Boundary ◽  
Basin And Range Province ◽  
Slip Rates

60 k.y. record of extension across the western boundary of the Basin and Range province: Estimate of slip rates from offset shoreline terraces and a catastrophic slide beneath Lake Tahoe

Geology ◽  
2005 ◽  
Vol 33 (5) ◽  
pp. 365 ◽  
Author(s):  
G.M. Kent ◽  
J.M. Babcock ◽  
N.W. Driscoll ◽  
A.J. Harding ◽  
J.A. Dingler ◽  
...  
Keyword(s):  
Lake Tahoe ◽  
Basin And Range ◽  
Western Boundary ◽  
Basin And Range Province ◽  
Slip Rates

scholarly journals Quantifying Normal Fault Evolution from River Profile Analysis in the Northern Basin and Range Province, Southwest Montana, USA

Lithosphere ◽  
2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Ian P. Armstrong ◽  
Brian J. Yanites ◽  
Nate Mitchell ◽  
Clarke DeLisle ◽  
Bruce J. Douglas
Keyword(s):  
Normal Fault ◽  
Basin And Range ◽  
Fault Slip ◽  
Stream Power ◽  
Spatial And Temporal Patterns ◽  
Basin And Range Province ◽  
Slip Rates ◽  
Base Level ◽  
River Profiles ◽  
Fault Evolution

Abstract Over the past few decades, tectonic geomorphology has been widely implemented to constrain spatial and temporal patterns of fault slip, especially where existing geologic or geodetic data are poor. We apply this practice along the eastern margin of Bull Mountain, Southwest Montana, where 15 transient channels are eroding into the flat, upstream relict landscape in response to an ongoing period of increased base level fall along the Western North Boulder fault. We aim to improve constraints on the spatial and temporal slip rates across the Western North Boulder fault zone by applying channel morphometrics, cosmogenic erosion rates, bedrock characteristics, and calibrated reproductions of the modern river profiles using a 1-dimensional stream power incision model that undergoes a change in the rate of base level fall. We perform over 104 base level fall simulations to explore a wide range of fault slip dynamics and stream power parameters. Our best fit simulations suggest that the Western North Boulder fault started as individual fault segments along the middle to southern regions of Bull Mountain that nucleated around 6.2 to 2.5 Ma, respectively. This was followed by the nucleation of fault segments in the northern region around 1.5 to 0.4 Ma. We recreate the evolution of the Western North Boulder fault to show that through time, these individual segments propagate at the fault tips and link together to span over 40 km, with a maximum slip of 462 m in the central portion of the fault. Fault slip rates range from 0.02 to 0.45 mm/yr along strike and are consistent with estimates for other active faults in the region. We find that the timing of fault initiation coincides well with the migration of the Yellowstone hotspot across the nearby Idaho-Montana border and thus attribute the initiation of extension to the crustal bulge from the migrating hotspot. Overall, we provide the first quantitative constraints on fault initiation and evolution of the Western North Boulder fault, perhaps the farthest north basin in the Northern Basin and Range province that such constraints exist. We show that river profiles are powerful tools for documenting the spatial and temporal patterns of normal fault evolution, especially where other geologic/geodetic methods are limited, proving to be a vital tool for accurate tectonic hazard assessments.

The 6 November 1774 MI 6 Bolaños Graben Earthquake (Southern Basin and Range Province, West-Central Mexico): Macroseismic Observations and Neotectonic Implications

2020 ◽  
Vol 91 (5) ◽  
pp. 2473-2486 ◽  
Author(s):  
Max Suter
Keyword(s):  
Hot Springs ◽  
Basin And Range ◽  
Alluvial Fan ◽  
Central Mexico ◽  
Western Boundary ◽  
Basin And Range Province ◽  
Active Deformation ◽  
Ground Shaking ◽  
Southern Basin ◽  
West Central

Abstract The continental part of west-central Mexico is characterized by the active extensional tectonic regimes of the Trans-Mexican volcanic belt and the adjacent southern Basin and Range Province. The deformation of the latter is distributed over several topographically very pronounced grabens and half-grabens (width 10–20 km, length ≤200  km; throw 1–2 km), including the Aguascalientes, Juchipila, Tlaltenango, and Bolaños grabens. Here, an A.D. 1774–1775 earthquake series in that area is documented based on numerous contemporary sources. The 6 November 1774 mainshock caused moderate-to-severe damage in several communities of the Bolaños graben, including the silver mining town of Bolaños, and moderate damage to communities in the Tlaltenango graben, such as the administrative center of Colotlán. Based on the macroseismic intensity distribution, the epicenter was in the Bolaños graben. The preferred magnitude of the mainshock is ∼6.0±0.5. No major historical earthquake had been reported previously from this region. Existing ground-shaking hazard models may, therefore, give a false sense of security. In the Bolaños graben, motion along the graben-bounding faults and the observed tilting of the graben shoulders has to be mostly younger than the 19.9 Ma age of the youngest basalt of the graben-shoulder stratigraphy. Its correlation across the western master fault indicates a 1300 m throw and a vertical long-term slip rate of 0.07  mm/yr. The observations of alluvial fan deposits juxtaposed against the footwall ignimbrites along the western master fault of the Bolaños graben, the displacement of alluvial fan deposits along secondary faults within the graben, and the existence of hot springs along the western boundary fault all are indicative of active deformation, and so is evidently the A.D. 1774 earthquake.

Mineral resource areas of the Basin and Range Province of Texas

1983 ◽  
Author(s):  
Christopher D. Henry ◽  
J.G. Price ◽  
M.F. Hutchins
Keyword(s):  
Mineral Resource ◽  
Basin And Range ◽  
Basin And Range Province
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