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Mechanical interaction among normal ...

Crider, Juliet Gage.

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Mechanical interaction among normal faults: A numerical field and seismological investigation.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Mechanical interaction among normal faults: A numerical field and seismological investigation./
Author:	Crider, Juliet Gage.
Description:	153 p.
Notes:	Adviser: David D. Pollard.
Contained By:	Dissertation Abstracts International59-10B.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9908743
ISBN:	059906899X

Mechanical interaction among normal faults: A numerical field and seismological investigation.
Crider, Juliet Gage.

Mechanical interaction among normal faults: A numerical field and seismological investigation. - 153 p.

Adviser: David D. Pollard.

Thesis (Ph.D.)--Stanford University, 1998.

The segmentation of normal faults influences both their structural development and seismogenic character. In this study, field and seismological observations of normal faults from southern Oregon are combined with three-dimensional numerical modeling to illuminate the effect of mechanical interaction among fault segments.

ISBN: 059906899XSubjects--Topical Terms:

516570
Geology.

Mechanical interaction among normal faults: A numerical field and seismological investigation.
LDR:03435nam 2200325 a 45 001 931131
005 20110429
008 110429s1998 eng d
020 $a 059906899X
035 $a (UnM)AAI9908743
035 $a AAI9908743
040 $a UnM $c UnM
100 1 $a Crider, Juliet Gage. $3 1254675
245 1 0 $a Mechanical interaction among normal faults: A numerical field and seismological investigation.
300 $a 153 p.
500 $a Adviser: David D. Pollard.
500 $a Source: Dissertation Abstracts International, Volume: 59-10, Section: B, page: 5283.
502 $a Thesis (Ph.D.)--Stanford University, 1998.
520 $a The segmentation of normal faults influences both their structural development and seismogenic character. In this study, field and seismological observations of normal faults from southern Oregon are combined with three-dimensional numerical modeling to illuminate the effect of mechanical interaction among fault segments.
520 $a Field observations of two overlapping normal faults and associated deformation document features common to many normal-fault relay zones. A boundary element method numerical model, using simple fault-plane geometries, material properties, and boundary conditions, reproduces the principal characteristics of the observed fault scarps. The model produces a region of high Coulomb shear stress in the relay zone. The results suggest that the mechanical interaction between segments of a normal-fault system promote the development of connected, zigzagging fault scarps.
520 $a The interplay between tectonic tension and lithostatic compression should strongly influence the near-surface behavior of surface-breaking normal faults. Four simple boundary conditions are evaluated for application to modeling surface-breaking normal faults.
520 $a Map patterns of normal fault linkages from Lake County, Oregon show a systematic relationship between echelon step-sense, oblique extension direction, and the position of linking faults. When the step sense is the same as the sense of oblique extension, the faults are linked in the lower part of their relay ramp. When the step-sense and extension-sense are opposite, the faults are linked in the upper part of the ramp. The calculated stress fields around echelon normal faults reveal a relationship similar to the field observations. Thus, oblique slip alters the mechanical interaction among segments and influences the geometry of fault linkage.
520 $a The 1993 Klamath Falls, Oregon earthquake sequence shows evidence for fault segmentation in the occurrence of two main shocks and in the spatial distribution of aftershocks. Late stage, off fault aftershocks suggest a time-delay in triggering that may be controlled by pore fluid pressure. Three-dimensional static stress modeling is consistent with triggering of the second main shock by the first, but does not correlate with the locations of the off-fault aftershocks. Modeling of the change in pore fluid pressure with time shows that the off-fault aftershocks could have been triggered by transient pore pressure changes in the months following the initial earthquakes.
590 $a School code: 0212.
650 4 $a Geology. $3 516570
650 4 $a Geophysics. $3 535228
690 $a 0372
690 $a 0373
710 2 0 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 59-10B.
790 $a 0212
790 1 0 $a Pollard, David D., $e advisor
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9908743