Download or read book Geologic Mapping and Kinematic Analysis of a Shear Zone Near the Garlock Southern Death Valley Fault Zone Intersection Fort Irwin California written by Michael Christopher Dean and published by . This book was released on 1995 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Graduate Theses and Dissertations on California Geology 1990 Through 1997 written by and published by . This book was released on 1998 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Processes in Faults and Shear Zones written by G. Ian Alsop and published by Geological Society of London. This book was released on 2004 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faults and their deeper level equivalents, shear zones, are localized regions of intense deformation within the Earth. They are recognized at all scales from micro to plate boundary, and are important examples of the nature of heterogeneous deformation in natural rocks. Faults and shear zones are significant as they profoundly influence the location, architecture and evolution of a broad range of geological phenomenao The topography and bathymetry of the Earth's surface is marked by mountain belts and sedimentary basins that are controlled by faults and shear zoneso In addition, faults and shear zones control fluid migration and transport including hydrothermal and hydrocarbon systems. Once faults and shear zones are established, they are often long-lived features prone to multiple reactivation over very large time-scales. This collection of papers addresses lithospheric deformation and the rheology of shear zones, together with processes of partitioning and the unravelling of fault and shear zone histories.
Download or read book Testing Kinematic Fault slip Models in the Eastern California Shear Zone Walker Lane Belt written by Rachelle Marie Warren and published by . This book was released on 2014 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kinematics of Transrotational Tectonism in the California Transverse Ranges and Its Contribution to Cumulative Slip Along the San Andreas Transform Fault System written by William R. Dickinson and published by Geological Society of America. This book was released on 1996-01-01 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Owens Valley Fault Zone Eastern California and Surface Faulting Associated with the 1872 Earthquake written by Sarah Beanland and published by . This book was released on 1994 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of slip and magnitude of the 1872 Owens Valley earthquake and estimates of late Quaternary slip, slip rate, and earthquake recurrence associated with the 100-km-long fault zone as determined at 40 sites.
Download or read book Vertical Deformation Stress Accumulation and Secondary Faulting in the Vicinity of the Transverse Ranges of Southern California written by Donald A. Rodgers and published by . This book was released on 1979 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Detailed Geophysical and Geological Investigation at the Intersection of the Black Mountain Wingate Wash and Southern Death Valley Fault Zones Death Valley California written by Patrick J. Hogan and published by . This book was released on 1987 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Net Dextral Slip Neogene San Gregorio Hosgri Fault Zone Coastal California written by William R. Dickinson and published by Geological Society of America. This book was released on 2005-01-01 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Faulting on Ground water Movement in the Death Valley Region Nevada and California written by Claudia C. Faunt and published by . This book was released on 1997 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Fracturing at the Southern End of Summit Ridge Caused by October 17 1989 Loma Prieta California Earthquake Sequence written by Sumaryanto Y. Martosudarmo and published by . This book was released on 1997 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Possible Large Right lateral Displacement Along Fault and Shear Zones in the Death Valley Las Vegas Area California and Nevada written by J. H. Stewart and published by . This book was released on 1967* with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reflection Seismic Profiling of the Wabash Valley Fault System in the Illinois Basin written by R. M. René and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigating Fault System Deformation with Numerical Models and Analog Experiments written by Justin W. Herbert and published by . This book was released on 2014 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation aims to understand fault system deformation using numerical models and analog experiments. In southern California, the southern Big Bend of the San Andreas fault (SAF) is a zone of transpression that accommodates deformation associated with the Pacific-North American plate boundary. Using three-dimensional boundary element method (BEM) models, I test the sensitivity of fault slip rates to a range of tectonic boundary conditions constrained by Global Positioning System (GPS) studies of the region (45-50 mm/yr and 320°- 325°). I have modified fault configurations derived from the Southern California Earthquake Center Community Fault Model of the San Gorgonio knot and the eastern California shear zone (ECSZ) to better represent the disconnected nature of active faults in southern California. The models with revised fault geometry produce slip rates that better match geologic strike-slip rates, thus validating the revisions. More northerly plate velocity (325°) produces greater transpression along the SAF system associated with greater uplift of the San Bernardino Mountains, greater reverse-slip rates along range bounding reverse thrust faults, lower strike-slip rates along the San Andreas and San Jacinto faults, and greater strike-slip rates along the eastern California shear zone (ECSZ) and Garlock fault. These results suggest that the degree of regional transpression controls the partitioning of deformation between uplift and slip along both the SAF system and the ECSZ. Along the San Bernardino strand of the SAF and across the ECSZ, geologic slip rates differ from those inverted from geodetic measurements, which may partly be due to inaccurate fault connectivity within geodetic models. I compare results from fault networks that follow mapped geologic traces and resemble those used in block model inversions, which connect the San Jacinto fault to the SAF near Cajon Pass and connect distinct faults within the ECSZ. The connection of the SAF with the San Jacinto fault decreases strike-slip rates along the SAF by up to 10% and increases strike-slip rates along the San Jacinto fault by up to 16%; however, slip rate changes are still within the large geologic ranges along the SAF. The insensitivity of modeled interseismic surface velocities near Cajon Pass to fault connection suggests that inverse models may utilize both an incorrect fault geometry and slip rate and still provide an excellent fit to interseismic geodetic data. Similarly, connection of faults within the ECSZ produces 36% greater cumulative strike-slip rates but less than 17% increase in interseismic velocity. Within the models that follow the mapped traces, off-fault deformation accounts for 40% ± 23% of the total strain across the ECSZ. This suggests that a significant portion of the discrepancy between the geologic and geodetically modeled slip rates in the ECSZ could be due to the geodetic inversion model assumption of zero permanent off-fault deformation. When using overconnected models to invert GPS for slip rates, the reduced off-fault deformation within the models can lead to overprediction of slip rates. Analog models of sandbox experiments performed at the Universite de Cergy-Pontoise (UCP) shed light on the amount of work required to create faults (Wgrow) in coarse sand. Casagrande shear experiments calculate a Wgrow that is consistent with that calculated in the sandbox and both values scale properly to crustal calculations. Calculations of Wgrow are higher for thicker sand pack layer experiments. Utilizing different materials within the compressional sandbox (GA39 sand and glass beads) shows the control of material properties on Wgrow as well. Numerical simulations of the UCP sandbox experiments test whether fault growth occurs via work minimization. To the first order, faults observed in sandbox experiments match the model predicted faults that minimize work in two-dimensional BEM simulations. The BEM models and work minimization shed light on fault growth path and timing.
Download or read book Geodimeter Fault Movement Investigations in California written by California. Department of Water Resources and published by . This book was released on 1968 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kinematic Models of Deformation in Southern California Constrained by Geologic and Geodetic Data written by Lori A. Eich and published by . This book was released on 2006 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a standardized fault geometry based on the Community Block Model, we create two analytic block models of the southern California fault system. We constrain one model with only geodetic data. In the other, we assign a priori slip rates to the San Andreas, Garlock, Helendale, Newport-Inglewood, Owens Valley, Sierra Madre, and Chino faults to create a joint geologic and geodetic model, using the a priori slip rates to refine the results in areas with limited geodetic data. Our results for the San Andreas fault are consistent with geologic slip rates in the north and south, but across the Big Bend area we find its slip rates to be slower than geologic rates. Our geodetic model shows right lateral slip rates of 19.8 + 1.3 mm/yr in the Mojave area and 17.3 ± 1.6 mm/yr near the Imperial fault; the San Gorgonio Pass area displays a left lateral slip rate of 1.8 + 1.7 mm/yr. Our joint geologic and geodetic model results include right lateral slip rates of 18.6 + 1.2 mm/yr in the Mojave area, 22.1 ± 1.6 mm/yr near the Imperial fault, and 9.5 1.4 mm/yr in the San Gorgonio Pass area. Both models show high values (10-13 1 mm/yr) of right lateral slip to the east of the Blackwater fault along the Goldstone, Calico, and Hidalgo faults. We show that substantially different block geometries in the Mojave can produce statistically similar model results due to sparse geodetic data.
Download or read book Toward Assessing the Seismic Risk Associated with Blind Faults San Francisco Bay Region California written by A. S. Jayko and published by . This book was released on 2011 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
