Paleoseismic Investigation and Long-term Slip History of the Hurricane Fault in Southwestern Utah PDF Download
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Author: William R. Lund
Publisher: Utah Geological Survey
ISBN: 1557917604
Category : CD-ROMs
Languages : en
Pages : 81
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Book Description
This 81 page report presents the results of a study of the Hurricane fault in Utah.
Author: William R. Lund
Publisher: Utah Geological Survey
ISBN: 1557917604
Category : CD-ROMs
Languages : en
Pages : 81
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Book Description
This 81 page report presents the results of a study of the Hurricane fault in Utah.
Author: William R. Lund
Publisher: Utah Geological Survey
ISBN: 1557917876
Category : Science
Languages : en
Pages : 37
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Book Description
This 37 page report presents the results of a study of the Sevier fault in Utah.
Author: Anthony J. Crone
Publisher: Utah Geological Survey
ISBN: 1557918945
Category : Earthquake hazard analysis
Languages : en
Pages : 43
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Book Description
This 43-page report presents new data from the Willow Creek site that provides well-defined and narrow bounds on the times of the three youngest earthquakes on the southern strand of the Nephi segment, Wasatch Fault zone, and refines the time of the youngest earthquake to about 200 years ago. This is the youngest surface rupture on the entire Wasatch fault zone, which occurred about a century or less before European settles arrived in Utah. Two trenches at the Willow Creek site exposed three scarp-derived colluvial wedges that are evidence of three paleoearthquakes. OxCal modeling of ages from Willow Creek indicate that paleoearthquake WC1 occurred at 0.2 ± 0.1 ka, WC2 occurred at 1.2 ± 0.1 ka, and WC3 occurred at 1.9 ± 0.6 ka. Stratigraphic constraints on the time of paleoearthquake WC4 are extremely poor, so OxCal modeling only yields a broadly constrained age of 4.7 ± 1.8 ka. Results from the Willow Creek site significantly refine the times of late Holocene earthquakes on the Southern strand of the Nephi segment, and this result, when combined with a reanalysis of the stratigraphic and chronologic information from previous investigations at North Creek and Red Canyon, yield a stronger basis of correlating individual earthquakes between all three sites.
Author: William R. Lund
Publisher: Utah Geological Survey
ISBN: 1557917272
Category : Science
Languages : en
Pages : 114
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Book Description
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.
Author: Paul Inkenbrandt
Publisher: Utah Geological Survey
ISBN: 155791883X
Category : Aquifer storage recovery
Languages : en
Pages : 46
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Book Description
In this 46-page report, we characterized the deep aquifer system and its connections to the overlying aquifers in the area of the Hurricane fault in Washington County by examining well logs, creating regional potentiometric-surface maps, compiling groundwater quality data, conducting gravity surveys, examining remote sensing data for surface lineaments, and determining areas for potential monitoring wells. Results of the study were: (1) R and C aquifer groundwater depths are > 500 feet in the I-15 corridor area, (2) a groundwater divide likely exists south of the Utah-Arizona state line, (3) groundwater flow follows open fracture systems, (4) fracture conductivity is highest near the fault, (5) dissolution of evaporites increase groundwater TDS, and (6) a well should be drilled into the Hurricane fault near Pintura.
Author: Paul Inkenbrandt
Publisher: Utah Geological Survey
ISBN: 1557918910
Category : Base flow (Hydrology)
Languages : en
Pages : 84
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Book Description
This 116-page report presents the results of an investigation by the Utah Geological Survey of land subsidence and earth fissures in Cedar Valley, Iron County, Utah. Basin-fill sediments of the Cedar Valley Aquifer contain a high percentage of fine-grained material susceptible to compaction upon dewatering. Groundwater discharge in excess of recharge (groundwater mining) has lowered the potentiometric surface in Cedar Valley as much as 114 feet since 1939. Groundwater mining has caused permanent compaction of fine-grained sediments of the Cedar Valley aquifer, which has caused the land surface to subside, and a minimum of 8.3 miles of earth fissures to form. Recently acquired interferometric synthetic aperture radar imagery shows that land subsidence has affected approximately 100 mi² in Cedar Valley, but a lack of accurate historical benchmark elevation data over much of the valley prevents its detailed quantification. Continued groundwater mining and resultant subsidence will likely cause existing fissures to lengthen and new fissures to form which may eventually impact developed areas in Cedar Valley. This report also includes possible aquifer management options to help mitigate subsidence and fissure formation, and recommended guidelines for conducting subsidence-related hazard investigations prior to development.
Author: George H. Davis
Publisher: John Wiley & Sons
ISBN: 0471152315
Category : Science
Languages : en
Pages : 866
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Book Description
Relates the physical and geometric elegance of geologic structures within the Earth's crust and the ways in which these structures reflect the nature and origin of crystal deformation through time. The main thrust is on applications in regional tectonics, exploration geology, active tectonics and geohydrology. Techniques, experiments, and calculations are described in detail, with the purpose of offering active participation and discovery through laboratory and field work.
Author: William R. Lund
Publisher:
ISBN: 9781557919182
Category : Earthquakes
Languages : en
Pages : 175
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Book Description
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
Author: James McCalpin
Publisher: Utah Geological Survey
ISBN: 1557916713
Category : Nature
Languages : en
Pages : 53
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Book Description
This Utah Geological Survey Miscellaneous Publication, Post-Provo Paleoearthquake Chronology of the Brigham City Segment, Wasatch Fault Zone, Utah, is the eleventh report in the Paleoseismology of Utah series. This 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 on paleoearthquake parameters such as timing, recurrence, displacement, slip rate, and fault geometry which can be used to characterize potential seismic sources and evaluate the long-term seismic hazard presented by Utah’s Quaternary faults. This report presents the results of the most extensive single paleoseismic-trenching project yet conducted on the Wasatch fault zone. The purpose of the study was to lengthen the paleoseismic chronology for the Brigham City segment of the Wasatch fault zone beyond the 6,000-year record previously available, and to resolve questions regarding the irregular pattern of paleoearthquakes reported by earlier workers for the Brigham City segment. This study makes extensive use of radiocarbon, thermoluminescence, and infrared stimulated luminescence dating techniques to develop a real-time chronology of past surface-faulting earthquakes.
Author: Bill D. Black
Publisher: Utah Geological Survey
ISBN: 1557916462
Category : Fault zones
Languages : en
Pages : 29
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Book Description
Field work for this paleoseismic investigation was performed in 1997 at three sites (Winter Canyon, Roundy Farm, and Deep Canyon) on the Clarkston, Junction Hills, and Wellsville faults. These faults, along with several lesser associated faults nearby, comprise the West Cache fault zone on the west side of Cache Valley. No previous paleoseismic studies had been conducted on these faults. The information reported here on the size, timing, and recurrence of surface-faulting earthquakes on the West Cache fault zone is critical to public officials, planners, and others making decisions regarding earthquake-hazard mitigation in Cache Valley and the northern Wasatch front. 23 pages + 1 plate
