Download or read book Determination of Fault Slip Rates Paleoearthquake History and Segmentation of the Warm Springs Valley Fault System written by Craig M. DePolo and published by . This book was released on 2006 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book OF2006 02 Biennial Report of the Nevada Bureau of Mines and Geology written by and published by NV Bureau of Mines & Geology. This book was released on with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleoseismic Investigation and Long term Slip History of the Hurricane Fault in Southwestern Utah written by William R. Lund and published by Utah Geological Survey. This book was released on 2007 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 81 page report presents the results of a study of the Hurricane fault in Utah.
Download or read book Consensus Preferred Recurrence interval and Vertical Slip rate Estimates written by William R. Lund and published by Utah Geological Survey. This book was released on 2005-06-30 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of the Utah Quaternary Fault Parameters Working Group (hereafter referred to as the Working Group) review and evaluation of Utah’s Quaternary fault paleoseismic-trenching data. The purpose of the review was to (1) critically evaluate the accuracy and completeness of the paleoseismictrenching data, particularly regarding earthquake timing and displacement, (2) where the data permit, assign consensus, preferred recurrence-interval (RI) and vertical slip-rate (VSR) estimates with appropriate confidence limits to the faults/fault sections under review, and (3) identify critical gaps in the paleoseismic data and recommend where and what kinds of additional paleoseismic studies should be performed to ensure that Utah’s earthquake hazard is adequately documented and understood. It is important to note that, with the exception of the Great Salt Lake fault zone, the Working Group’s review was limited to faults/fault sections having paleoseismic-trenching data. Most Quaternary faults/fault sections in Utah have not been trenched, but many have RI and VSR estimates based on tectonic geomorphology or other non-trench-derived studies. Black and others compiled the RI and VSR data for Utah’s Quaternary faults, both those with and without trenches.
Download or read book Holocene Slip Rate and Paleoearthquake History of the Green Valley Fault at Lopes Ranch Creek Cordelia California written by John N. Baldwin and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Regional Earthquake Hazards and Risk Along the Wasatch Front Utah written by Paula Gori and published by . This book was released on 1992 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapters A-J are issued as a single volume and are not available separately.
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 High Geologic Slip Rates Since Early Pleistocene Initiation of the San Jacinto and San Felipe Fault Zones in the San Andreas Fault System Southern California USA written by and published by Geological Society of America. This book was released on 2010-01-01 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The San Jacinto right-lateral strike-slip fault zone is crucial for understanding plate-boundary dynamics, regional slip partitioning, and seismic hazards within the San Andreas fault system of southern California, yet its age of initiation and long-term average slip rate are controversial. This synthesis of prior and new detailed studies in the western Salton Trough documents initiation of structural segments of the San Jacinto fault zone at or slightly before the 1.07 Ma base of the Jaramillo subchron. In Special Paper 475, five new estimates of displacement are developed using offset successions of crystalline rocks; distinctive marker beds in the late Cenozoic basin fill; analysis of strike-slip-related fault-bend folds; quantification of strain in folds at the tips of dextral faults; and gravity, magnetic, and geomorphic data sets."--Publisher's website.
Download or read book Assessment of Regional Earthquake Hazards and Risk Along the Wasatch Front Utah written by and published by . This book was released on 1984 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapters A-J are issued as a single volume and are not available separately.
Download or read book Post Bonneville Paleoearthquake Chronology of the Salt Lake City Segment Wasatch Fault Zone from the 1999 Megatrench Site written by James McCalpin and published by Utah Geological Survey. This book was released on 2002 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a paleoseismic investigation designed to date a long series of consecutive earthquakes on the Wasatch fault zone and to measure the variability of recurrence times between the events. Geologists have long recognized that the comparatively short average recurrence interval (compared to most other basin-and-range normal faults) between large surface-faulting earthquakes on the Salt Lake City segment of the Wasatch fault zone during mid- to late-Holocene time is potentially anomalous, and possibly affected by the rise and fall of Lake Bonneville. This study extends the paleoearthquake record back to Bonneville time, nearly doubling the previous record, and provides new information on the timing and periodicity of surface faulting on the Salt Lake City segment from the latest Pleistocene through the Holocene. The trench and accompanying auger hole for this study exposed 26 meters of vertical section, roughly four times that of a typical paleoseismic trench on the Wasatch fault zone, hence the name “Megatrench.”
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Reconnaissance Technique for Estimating the Slip Rates of Normal slip Faults in the Great Basin and Application to Faults in Nevada U S A written by Craig M. DePolo and published by . This book was released on 1998 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geologic Mapping and Paleoseismic Investigations of the Washington Fault Zone Washington County Utah and Mohave County Arizona written by William R. Lund and published by . This book was released on 2015 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Paleoseismology of Utah series makes the results of paleoseismic investigations in Utah available to geoscientists, engineers, planners, public officials, and the general public. These studies provide critical information regarding paleoearthquake parameters such as earthquake timing, recurrence, displacement, slip rate, fault geometry, and segmentation, which can be used to characterize potential seismic sources and evaluate the long-term seismic hazard of Utah's Quaternary faults. This Miscellaneous Publication presents the results of four individual investigations undertaken to acquire new geologic and paleoseismic data on the Washington fault zone in Utah and northernmost Arizona. (1) New 1:24,000 scale geologic mapping provides improved information on the location and length of young surface ruptures and the relative ages of displaced surficial deposits along the Washington fault zone. (2) A detailed paleoseismic trenching investigation of a scarp formed on a latest Quaternary alluvial fan near Dutchman Draw in Arizona provides new information on paleoearthquake timing, displacement, and recurrence necessary for evaluating the seismic hazard presented by the Fort Pearce section to the St. George metropolitan area. (3) Trace element and major oxide geochemical correlation and radiometric dating 40 Ar/ 39 Ar of mafic volcanic flows displaced across the fault zone in Arizona provide long-term (early to middle Quaternary) vertical sliprate estimates for the Fort Pearce and Sullivan Draw sections of the fault. (4) A geotechnical consultant's surface fault rupture hazard investigation conducted for the Utah Department of Transportation provides new information on fault locations, number of earthquakes, and displacement per earthquake on the central part of the Fort Pearce section
Download or read book Paleoseismic Reconnaissance of the Sevier Fault Kane and Garfield Counties Utah written by William R. Lund and published by Utah Geological Survey. This book was released on 2008 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 37 page report presents the results of a study of the Sevier fault in Utah.
Download or read book Paleoseismic and Archaeologic Investigation of the Northern San Gregorio Fault Seal Cove San Mateo County California written by and published by . This book was released on 1995 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploration of the Holocene Record of Fault Slip for the Mojave Section of the San Andreas Fault written by Teresa Compton O'Banion and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring histories of fault slip spanning multiple (10-100) ruptures has the potential to advance understanding of fault and fault-system behavior, including temporal variations in the rate of strain release. The Mojave section of the San Andreas fault (MSAF) shows an apparent discrepancy between slip rates where reported geodetic rates are systematically slower relative to geologic rates. Resolving this discrepancy is important for determining whether or not the MSAF exhibits temporal changes in slip. Paleoseismic data along the MSAF suggest temporal variations in strain release over the last 2 ka, but more studies are needed to extend the slip history back in time. Here we address the problem of the apparent slip rate discrepancy and possible temporal variations in strain release by employing Monte Carlo analysis of previously reported displacement-time data to investigate the extent to which these data constrain the Holocene slip history. We evaluated 42 previously reported piercing lines for possible inclusion in our analysis, 15 of which were unused because they are either duplicate reports or poorly documented. The remaining 27 data points reveal that slip rates are nonexistent for five offset distances (19-27m, 33-42m, 45-63m, 65-129m, and 131-300m) and for three time periods from 10-3.9 ka, 3.9-2.8 ka, and 2.8-1.4 ka. Results of this analysis suggest slip rate along the MSAF varied between 0 and 4.5 ka, with five possible phases of strain release, 3 of which are faster than the average of ~30 mm yr−1. The oldest fast phase was from 4.5-2.9 ka with an average slip rate of 61 506/40 mm yr−1. The next fast phase, with an average rate of 81 54/3 mm yr−1, was from 1.5-1.1 ka. The youngest fast phase resulted in a rate of 38 +12/−11 mm yr−1 between 0.4 ka and the 1857 event. Slower phases of slip occurred from 2.9-1.5 ka, with an average rate of 12 +12/−5 mm yr−1, and from 1.1-0.4 ka, with a slip rate of 20 +9/− mm yr−1. These slip history findings are considered preliminary because they are based on a limited dataset that contains data gaps. To aide in our search for additional potentially dateable offsets preserved along the MSAF, we used available airborne LiDAR and virtual-reality visualization software Crusta. Crusta is a virtual globe application that supports real-time interactive visualization of large (>60GB) LiDAR digital elevation models and merges the mapping functionality of ArcMap with the terrain visualization capabilities of GoogleEarth. On a 100-km section of the MSAF we found 60 offsets ranging from 20 to 297 m, many of which show promise as potential slip-rate sites. We determined offset uncertainties using the slicer tool, which is a recently developed function in Crusta that allows the user to assign a fault plane by dropping nodes along a linear fault trace and interactively moving one fault block relative to the other in any slip direction. This functionality allows the user to incrementally restore fault slip until topographic features on opposite sides of the fault are aligned. This tool has been helpful in identifying, evaluating, and reconstructing possible landform offsets. This work provides the necessary foundation for future geochronologic measurements and thus is the critical first step in refining and completing the slip history of the MSAF.
Download or read book Three dimensional Paleoseismic Investigation on the South Break of the Coyote Creek Fault Southern California written by Altangerel Orgil and published by . This book was released on 2001 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
