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Temporal and spatial patterns of nor...

Mattson, Ann.

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Temporal and spatial patterns of normal faults: Determined by geomorphic, geological, and geophysical techniques, eastern Great Basin, Utah.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Temporal and spatial patterns of normal faults: Determined by geomorphic, geological, and geophysical techniques, eastern Great Basin, Utah./
作者:	Mattson, Ann.
面頁冊數:	206 p.
附註:	Adviser: Ronald L. Bruhn.
Contained By:	Dissertation Abstracts International64-02B.
標題:	Geology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3082860

Temporal and spatial patterns of normal faults: Determined by geomorphic, geological, and geophysical techniques, eastern Great Basin, Utah.
Mattson, Ann.

Temporal and spatial patterns of normal faults: Determined by geomorphic, geological, and geophysical techniques, eastern Great Basin, Utah. - 206 p.

Adviser: Ronald L. Bruhn.

Thesis (Ph.D.)--The University of Utah, 2003.

The spatial and temporal patterns of normal faults provide critical information concerning seismic hazard analysis and the evolution of mountain front morphology. This study focuses on the continental rift zone of the eastern Great Basin, Utah, to evaluate fault behavior at time scales up to a few hundred thousand years, and integrates geomorphic, geological, and geophysical data with numerical methods, to determine slip rate, slip distribution, and temporal patterns of faulting.Subjects--Topical Terms:

516570
Geology.

Temporal and spatial patterns of normal faults: Determined by geomorphic, geological, and geophysical techniques, eastern Great Basin, Utah.
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245 1 0 $a Temporal and spatial patterns of normal faults: Determined by geomorphic, geological, and geophysical techniques, eastern Great Basin, Utah.
300 $a 206 p.
500 $a Adviser: Ronald L. Bruhn.
500 $a Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0594.
502 $a Thesis (Ph.D.)--The University of Utah, 2003.
520 $a The spatial and temporal patterns of normal faults provide critical information concerning seismic hazard analysis and the evolution of mountain front morphology. This study focuses on the continental rift zone of the eastern Great Basin, Utah, to evaluate fault behavior at time scales up to a few hundred thousand years, and integrates geomorphic, geological, and geophysical data with numerical methods, to determine slip rate, slip distribution, and temporal patterns of faulting.
520 $a A nonlinear diffusion equation model is calibrated using fault scarps with known paleoseismic histories along the Wasatch fault zone (WFZ) and Lake Bonneville shoreline scarps. Application to undated fault scarps indicates that slip rate decreases from &sim;1.0 m/kyr along the WFZ to &sim;0.1 m/kyr along the Oquirrh and Stansbury Mountains fault zones. Analysis of fault scarps at the southern end of the Nephi segment, WFZ, indicates a slip rate of 1.3 m/kyr for the last 4.3 ka versus 0.4 m/kyr for the last 70 ka and therefore possible temporal clustering.
520 $a Seismic tomography inverts first arrival traveltimes for subsurface velocity distribution. Seismic tomograms located across fault scarps on the Mercur fan, Oquirrh Mountains, contain shallow low velocity zones (LVZs) that correlate to trenched colluvial deposits and deeper LVZs that are interpreted as colluvial deposits. Alluvial deposits that separate the two LVZs suggest clustered tectonic activity or pulses of fan aggradation. Integration of paleoseismic data with the interpreted thickness of the deeper LVZ, preliminary cosmogenic ages, and the paleoclimate record yields slip rate estimates of 0.07 ± 0.03 m/kyr to 0.08 ± 0.02 m/kyr for up to 500 ka.
520 $a The southern Oquirrh Mountains consist of folded Paleozoic bedrock that strikes parallel to the relatively gentle range front and dips subparallel to a distributed fault zone. In contrast, the folded bedrock of the northern Oquirrh Mountains strikes obliquely to the trace of the active fault and the range front is steeper. The results from a simple boundary element model suggest that preferential slip occurs on secondary frictional surfaces that dip 50° to 70° synthetically or antithetically to a master fault, and may explain the variations in fault geometry and mountain front morphology of the Oquirrh Mountains.
590 $a School code: 0240.
650 4 $a Geology. $3 516570
650 4 $a Geophysics. $3 535228
650 4 $a Physical Geography. $3 893400
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710 2 0 $a The University of Utah. $3 1017410
773 0 $t Dissertation Abstracts International $g 64-02B.
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