|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
1 Department of Geological Sciences and Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964-8000
A prominent west-dipping reflection that can be traced in seismic-reflection profiles over an area of 7000 km2 beneath the Sevier Desert basin of west-central Utah is generally referred to as the Sevier Desert detachment and is widely regarded as one of the best examples of an upper-crustal low-angle normal fault. The absence of evidence for fault-related deformation in drill cuttings and core from two industry boreboles that intersect this feature casts doubt on the fault interpretation. The existing interpretation is based mainly on the observation that high-angle normal faulting is restricted largely to Tertiary sedimentary and volcanic rocks above the reflection. An alternative explanation is that the high-angle faults are related to the withdrawal of early deposited lacustrine salt, which even today is as much as 2 km thick. Reevaluation of the seismic data suggests that the Sevier Desert reflection consists of two spatially and genetically distinct segments: a shallow segment here interpreted as an unconformity between Paleozoic and Tertiary strata and a fortuitously aligned deeper segment that is traceable to mid- and lower-crustal levels and that appears to represent a thrust fault related to the Cretaceous Sevier orogeny.
This article has been cited by other articles:
|
|
 |
|
  S. Hreinsdottir and R. A. Bennett Active aseismic creep on the Alto Tiberina low-angle normal fault, Italy Geology, August 1, 2009; 37(8): 683 - 686. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. A. Abers Slip on shallow-dipping normal faults Geology, August 1, 2009; 37(8): 767 - 768. [Full Text] [PDF]
|
|
|
|
 |
|
 B. Wernicke The detachment era (1977-1982) and its role in revolutionizing continental tectonics Geological Society, London, Special Publications, January 1, 2009; 321(1): 1 - 8. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. Christie-Blick and M. H. Anders Regional structure and kinematic history of the Sevier fold-and-thrust belt, central Utah: Discussion Geological Society of America Bulletin, March 1, 2007; 119(3-4): 506 - 507. [Full Text] [PDF]
|
|
|
|
|
|
J. C. Coogan and P. G. DeCelles Regional structure and kinematic history of the Sevier fold-and-thrust belt, central Utah: Reply Geological Society of America Bulletin, March 1, 2007; 119(3-4): 508 - 512. [Full Text] [PDF]
|
|
|
|
|
|
N. Christie-Blick, M. H. Anders, S. Wills, C. D. Walker, and B. Renik Observations from the Basin and Range Province (western United States) pertinent to the interpretation of regional detachment faults Geological Society, London, Special Publications, January 1, 2007; 282(1): 421 - 441. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. G. DeCelles and J. C. Coogan Regional structure and kinematic history of the Sevier fold-and-thrust belt, central Utah Geological Society of America Bulletin, July 1, 2006; 118(7-8): 841 - 864. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. McQuarrie and B. P. Wernicke An animated tectonic reconstruction of southwestern North America since 36 Ma Geosphere, December 1, 2005; 1(3): 147 - 172. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. M. Carney and S. U. Janecke Excision and the original low dip of the Miocene-Pliocene Bannock detachment system, SE Idaho: Northern cousin of the Sevier Desert detachment? Geological Society of America Bulletin, March 1, 2005; 117(3-4): 334 - 353. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Wills, M. H. Anders, and N. Christie-Blick Pattern of Mesozoic thrust surfaces and Tertiary normal faults in the Sevier Desert subsurface, west-central Utah Am J Sci, January 1, 2005; 305(1): 42 - 100. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. H. Anders, N. Christie-Blick, S. Wills, and S. W. Krueger Rock deformation studies in the Mineral Mountains and Sevier Desert of west-central Utah: Implications for upper crustal low-angle normal faulting Geological Society of America Bulletin, July 1, 2001; 113(7): 895 - 907. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Mitra and Z. Ismat Microfracturing associated with reactivated fault zones and shear zones: what can it tell us about deformation history? Geological Society, London, Special Publications, January 1, 2001; 186(1): 113 - 140. [Abstract] [PDF]
|
|
|
|
|
|
W. R. Buck and L. L. Lavier A tale of two kinds of normal fault: the importance of strain weakening in fault development Geological Society, London, Special Publications, January 1, 2001; 187(1): 289 - 303. [Abstract] [PDF]
|
|
|
|
 |
|
 S. J. Caskey, S. G. Wesnousky, P. Zhang, and D. B. Slemmons Surface faulting of the 1954 Fairview Peak (MS 7.2) and Dixie Valley (MS 6.8) earthquakes, central Nevada Bulletin of the Seismological Society of America, June 1, 1996; 86(3): 761 - 787. [Abstract] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
