Дисертації з теми "Volcanism Nevada"
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Callicoat, Jeffrey Scott. "Significance of Mid-Miocene volcanism in northeast Nevada: petrographic, chemical, isotopic, and temporal importance of the Jarbidge Rhyolite." Thesis, Kansas State University, 2010. http://hdl.handle.net/2097/6242.
Повний текст джерелаDepartment of Geology
Matthew E. Brueseke
The Jarbidge Rhyolite of Elko County, Nevada, is approximately 26 mapped bodies of porphyritic rhyolite. Several of the bodies are truncated by the Idaho or Utah border, and extend into the states for an unknown distance. This study focuses on five bodies, the Mahoganies, two near Wild Horse Reservoir, the outcrop enclosing the Jarbidge Mountains, and one outcrop south of Wells. The study’s focus is providing field, petrography, geochemistry, oxygen isotope, and geochronology information about the five previously mentioned bodies. Physical volcanology encountered during this study indicates the sampled Jarbidge Rhyolite are effusive lava flows and domes that coalesced over the life of the volcanic system. First order approximations indicate that erupted products cover ~1,289 km2 and erupted material totals ~509 km3. Petrography indicates primary anhydrous mineral assemblages, assimilation of granitoid, possible assimilation of metamorphic rock and magma mixing of mafic and silicic bodies. Collectively, the Jarbidge Rhyolite lava flows sampled are compositionally restricted from rhyolite to high silica rhyolite and all samples demonstrate A-type magma characteristics. Compositions from different bodies overlap on Harker diagrams, and trace element ratios distinguish few flows from the other samples. Rare earth element patterns mimic one another, and incompatible trace element ratios overlap between bodies, likely indicating the presence of one large magma body. Oxygen isotope values for selected samples range 6.61-8.95%oVSMOW are coincident with normal igneous values. New 40Ar/39Ar geochronology indicates Jarbidge Rhyolite volcanism initiated ca. 16.7 Ma near Wild Horse Reservoir and was active at Bear Creek Summit ca.15.8 Ma. Local Steens Basalt, geochemistry, and Au-Ag mineralization indicate Jarbidge Rhyolite is similar to Middle Miocene silicic volcanics (e.g. Santa Rosa-Calico volcanic field) further west in the Oregon-Idaho-Nevada tristate region.
Ryskamp, Elizabeth Balls. "Petrogenesis of Eocene-Oligocene magmatism of the Sulphur Springs Range, central Nevada: The role of magma mixing." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1607.pdf.
Повний текст джерелаBrueseke, Matthew Edward. "Mid-Miocene Magmatic System Development in the Northwestern United States." Miami University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1144773179.
Повний текст джерелаLum, Clinton Chew Lun. "Aspects of the petrogenesis of alkali basalts from the Lunar Crater volcanic field, Nevada." Connect to resource, 1986. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1230660431.
Повний текст джерелаIngalls, Andrew. "Reconnaissance Cenozoic volcanic geology of the Little Goose Creek area, northeastern Elko County, NV with an emphasis on the Jarbidge Rhyolite." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18195.
Повний текст джерелаDepartment of Geology
Matthew Brueseke
The Little Goose Creek area is located in Elko County, Nevada just south of the central Snake River Plain and in the northeastern Great Basin. During the Miocene, northeastern Nevada was characterized by volcanism as well as prevalent extension and basin development, including widespread occurrences of porphyritic quartz-phyric silicic lavas and domes (e.g., the Jarbidge Rhyolite), ash-flow tuffs, and basaltic volcanism. Recent workers (e.g., Colgan and Henry, 2010) have provided new constraints on the timing of extension in the northern Great Basin (U.S.A.) and indicate that much of it occurred in the mid-Miocene. Other recent work has provided new temporal and petrologic constraints on 16.1 to 15.0 Ma Jarbidge Rhyolite volcanism in the northern Great Basin west of our study area, and suggest that it is intimately linked (spatially and temporally) with the aforementioned extension. This study aims to: [1] understand the spatiotemporal link between the volcanism in the northeastern Nevada study area and potentially correlative volcanism regionally (e.g., Jarbidge Rhyolite and explosive deposits associated with the <13 Ma Bruneau-Jarbidge or Twin Falls eruptive centers); [2] determine if the sampled Jarbidge Rhyolite lavas are chemically similar to those in and around Jarbidge, Nevada. In the Goose Creek area, we report a new laser [superscript]40Ar/[superscript]39Ar age for sanidine of 13.6 ± 0.03 Ma for a crystal-poor rhyolite lava (Rock Springs Rhyolite) and a Jarbidge Rhyolite lava (13.827±0.021 Ma) as well as an age on Jarbidge Rhyolite in Wells, NV (15.249±0.040 Ma) and West Wendover, NV (13.686±0.034 Ma). These lava samples, as well as sampled ash-flow tuffs from the Goose Creek region, plot within the A-type field on discrimination diagrams. The ash-flow tuffs are younger than the Rock Springs Rhyolite based on stratigraphic relationships and are sourced from both the Twin Falls eruptive center as well as the Bruneau Jarbidge eruptive center of the central Snake River Plain based on geochemical analysis. Also, a sequence of basaltic lavas crop out in the Goose Creek drainage; these basalts have ~43 wt.% silica and are chemically similar to <8 Ma olivine tholeiite basalts that crop out to the north, along the southwestern side of the Cassia Mountains, Idaho. These results, field relationships, and prior geological mapping suggest that the lavas and ash-flow tuffs erupted into active extensional basins.
McKee, Ryan A. "Structure and volcanic evolution of the northern Highland Range, Colorado River Extensional Corridor, Clark County, Nevada." Thesis, San Jose State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10255048.
Повний текст джерелаA geologic map was drafted of the northern Highland Range (1:24,000 scale), rock units defined, and samples of the volcanic units were obtained and analyzed to produce a representative suite of chemical analyses to characterize the range of geochemical variability. The style, relative timing, and orientation of faults and dikes, and the magnitude and variability of stratal tilting was examined to evaluate the structural and magmatic evolution of the northern Highland Range in the context of models for the Colorado River Extensional Corridor and Black Mountains accommodation zone. Methods involved field mapping of the range scale structure and geometry of faulting, structural interpretation, and geochemical analysis of ten representative samples by X-ray spectrometry. Structural data was interpreted with stereonets; geochemical whole rock, and major elemental data was analyzed by comparing elemental oxides; trace elemental data was analyzed by normalizing to chondrite concentrations. The northern Highland Range is a ca. 3,000 m-thick sequence of volcanic and volcaniclastic flows and breccias overlain by regionally extensive tuffs (Mt. Davis and Bridge Spring). Unique mineralogy, geochemistry and lithologic character of some units and volcanic vent facies, as well as the presence of domes and dikes feeding the extrusives argue for local derivation from a dome/stratocone volcanic complex that was mostly restricted to the northern Highland Range.
B, Jhon Macario Londoño. "A seismic model for the volcanic activity of Nevado del Ruiz Volcano, Colombia." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149994.
Повний текст джерелаPage, David. "Fine-grained volcanic toolstone sources and early use in the Bonneville Basin of western Utah and eastern Nevada /." abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1455650.
Повний текст джерела"May 2008." Includes bibliographical references (leaves 146-158). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2009]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.
Kargel, J. S. "The geochemistry of basalts and mantle inclusions from the Lunar Crater volcanic field, Nevada : petrogenetic and geodynamic implications /." Connect to resource, 1987. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1226944070.
Повний текст джерелаKargel, Jeffrey Stuart. "The geochemistry of basalts and mantle inclusions from the Lunar Crater Volcanic Field, Nevada : petrogenetic and geodynamic implications." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1226944070.
Повний текст джерелаWilson, James Adams. "A New Volcanic Event Recurrence Rate Model and Code For Estimating Uncertainty in Recurrence Rate and Volume Flux Through Time With Selected Examples." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6435.
Повний текст джерелаClarke, Christopher Angus Leo. "A Geochemical Exploration of the Sagehen Volcanic Centre, Truckee-Tahoe Region, California, U.S.A." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22899.
Повний текст джерелаBerrios, Guerra Claudia Alicia. "Caracterización geoquímica de sistemas geotermales en zonas de transición: Volcanes nevados de Chillán y Copahue." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/134130.
Повний текст джерелаLos volcanes Nevados de Chillán y Copahue se ubican a los 36°50 y 38°S, respectivamente, y forman parte del arco volcánico de la zona volcánica sur (ZVS). Se ubican, además, dentro de una zona transicional morfo-tectónica de primer orden (36°-39°S) entre los Andes Centrales y los Andes Patagónicos. Esta zona posee una corteza moderadamente gruesa, teniendo una atenuación cortical de norte a sur (55 km a los 36°S a 45 km a los 38°S), y se caracteriza por la transición de una faja plegada y corrida Plio-Cuaternaria propagada hacia el antepaís, típica de los Andes de Chile Central, a una deformación Cuaternaria controlada por el Sistema de Falla de Liquiñe-Ofqui (SFLO), el cual constituye el rasgo estructural de primer orden en la ZVS. El objetivo principal de esta memoria es realizar una caracterización geoquímica de las manifestaciones termales superficiales asociadas a los volcanes Nevados de Chillán y Copahue, para determinar el origen de los fluidos termales Para esto se tomaron muestras de gases (fumarolas y pozos burbujeantes) y aguas termales en ambos lugares para luego determinar su composición química e isotópica (D y 18O). La caracterización geoquímica reveló que todas las aguas analizadas de Nevados de Chilllán corresponden a aguas vapor calentadas, con alto contenido de sulfatos. En Copahue no se pudo establecer esto mediante análisis de este estudio debido a que los resultados arrojaron altos errores en el balance iónico asociado a la manipulación posterior al muestreo. Sin embargo, según estudios anteriores, las aguas termales de este lugar también corresponden a aguas sulfatadas vapor calentadas. La temperatura superficial de ambos sistemas varía entre 63°-94°C, para las aguas, y entre 93°-94°C para los gases, con excepción de Pucón-Mahuida en Copahue que tiene una temperatura de 45°C. Las aguas de Nevados de Chillán presentan un pH variable entre ácido y neutro (3-7), en cambio, las aguas termales de Copahue presentan un pH ácido (3-4). Los análisis de isótopos estables (D-18O) muestran que la recarga del sistema hidrotermal, que alimenta las emisiones termales de ambos sistemas, es esencialmente meteórica, aunque en Copahue existiría un enriquecimiento en estos isótopos asociado a una participación de fluidos magmáticos. El geotermómetro de sílice indicó temperaturas entre 150°-200°C para ambos sistemas. Los geotermómetros de cationes indicaron que las muestras de Nevados de Chillán corresponden a aguas inmaduras, que no alcanzan el equilibrio en profundidad. La mayor diferencia entre estos dos sistemas se encuentra en la composición gaseosa. En Nevados de Chillán existe una importante participación atmosférica en la composición gaseosa, atribuible a infiltración de aire en niveles someros. Copahue presenta variaciones dependiendo del lugar. La mayoría tiene aportes desde los sedimentos subductados, mostrando composiciones que son típicas de las zonas de arco. Otras muestran aportes de aguas subterráneas saturadas en aire y otras tienen contaminación por aire relacionado a los sedimentos subductados. Otra diferencia se da en la concentración de CO2 siendo mucho mayor en Copahue que en Nevados de Chillán (hasta 40000 ppm de diferencia). Las temperaturas estimadas mediante geotermómetros gaseosos varían entre 120°-150°C para Nevados de Chillán y 200-250°C. En Copahue existe una marcada influencia volcánica y magmática en la composición de sus emisiones, pero también se encuentran controladas por las condiciones reductoras del sistema hidrotermal presente. En Nevados de Chillán esto no es tan notorio y la geoquímica de los fluidos termales en este lugar refleja procesos superficiales más que de un sistema profundo. Lo anterior tendría relación con las actividades de los volcanes y la profundidad de los sistemas geotermales, siendo más activo y con un sistema geotermal más profundo, el de Copahue. Se presentan dos modelos conceptuales, uno para cada sistema geotérmico. Ambos tienen características de sistemas geotérmicos asociados a fuentes magmáticas, sin embargo varían en profundidad y composición de las fuentes termales. Además que en Copahue existe una serie de fallas que favorecen el flujo de calor y fluidos. Finalmente, se cree que factores como el espesor cortical y la presencia de estructuras podrían ser factores que influyen en la geoquímica de las emisiones termales de estos sistemas geotérmicos, pero, no serían factores determinantes.
Wang, Runqi. "Fundamental studies of micromechanics, fracturing progression, and flow properties in tuffaceous rocks for the application of nuclear waste repository in Yucca Mountain." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186818.
Повний текст джерелаAmrhein, Kate E. "Testing models of low-[delta][superscript]1[superscript]8O silicic magmatism in the mid-Miocene Santa Rosa-Calico volcanic field, NV." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16291.
Повний текст джерелаDepartment of Geology
Matthew E. Brueseke
Low-[delta][superscript]1[superscript]8O silicic magmas are found in many volcanic provinces throughout the world, including the Snake River Plain-Yellowstone volcanic province (SRPY). The origin of SRPY low-[delta][superscript]1[superscript]8O silicic magmas is controversial, and centers on two disputed models: [1] a caldera collapse model that proposes reworking of the hydrothermally altered intra-caldera fill into the underlying silicic magma body, where each successive eruption lowers the [delta][superscript]1[superscript]8O of the magma eventually producing a low-[delta][superscript]1[superscript]8O magma and [2] melting previously hydrothermally altered mid-upper crust to form low-[delta][superscript]1[superscript]8O magmas. The mid-Miocene Santa Rosa-Calico volcanic field (SC) lies in northern Nevada. Brueseke and Hart (2008) described the geology and petrology of the SC, but did not deal with the [superscript]1[superscript]8O compositions of any locally sourced silicic magma. In the existing geological framework of the SC, this project aims to evaluate the two disputed models for low-[delta][superscript]1[superscript]8O silicic magma generation by analyzing the [delta][superscript]1[superscript]8O values of SC silicic eruptive products. Fifteen representative samples of locally erupted silicic units (e.g. ash-flow tuffs and lavas) were chosen for [superscript]1[superscript]8O analyses based on Sr-Nd-Pb isotope compositions, whole rock geochemistry, and field/temporal relationships. Each sample was crushed, sieved, and quartz and feldspar crystals were handpicked, described, and analyzed for their [superscript]1[superscript]8O compositions. Our results show that low-[delta][superscript]1[superscript]8O values exist in the SC and are limited to the youngest erupted silicic unit, the 15.8 to 15.4 Ma Cold Springs tuff, which was also the only unit erupted from a caldera. Cold Springs tuff [delta][superscript]1[superscript]8O feldspar values range from 2.36 to 4.05[per mil]; the unit is not quartz-bearing. Older silicic lavas that are not petrogenetically related to the Cold Springs tuff are characterized by normal [delta][superscript]1[superscript]8O feldspar values that range from 7.19 to 10.04[per mil]. Magma mixing models indicate that the source of the Cold Springs is a mixture of hydrothermally altered Granite Peak-Sawtooth granitoid and local mid-Miocene basalt, with an approximate range of [delta][superscript]1[superscript]8O values of 2-4[per mil], by fluids (with [delta][superscript]1[superscript]8O values ranging from -12[per mil] to + 7[per mil]) from the nearby hydrothermal system at Buckskin Mountain. This result follows the model by Boroughs et al. (2005) of prior alteration and melting, forming low-[delta][superscript]1[superscript]8O silicic magmas.
Woodhouse, Elizabeth Gail. "Perched water in fractured, welded tuff mechanisms of formation and characteristics of recharge /." Diss., The University of Arizona, 1997. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1997_87_sip1_w.pdf&type=application/pdf.
Повний текст джерелаJensen, Michael Seth. "40Ar/39Ar Ages, Compositions, and Likely Source of the Eocene Fallout Tuffs in the Duchesne River Formation, Northeastern Utah." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/7220.
Повний текст джерелаJensen, Michael Seth. "40Ar/39Ar Ages, Compositions, and Likely Source of the Eocene Fallout Tuffs in the Duchesne River Formation, Northeastern Utah." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/7270.
Повний текст джерелаMee, Katy. "The use of volcanic facies as tools for reconstructing former eruptive environments at Nevados de ChillaÌn volcano, Chile." Thesis, Lancaster University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428638.
Повний текст джерелаKuentz, Adèle. "Dynamiques actuelle et holocène de la Puna (Andes sèches du Pérou) à partir des observations de terrain, de la cartographie (SIG) et de la palynologie (Région du Nevado Coropuna)." Clermont-Ferrand 2, 2009. http://www.theses.fr/2009CLF20013.
Повний текст джерелаBlein, Olivier. "Les séquences magmatiques d'arc du Paléozoïque supérieur et Trias du Nevada (Etats-Unis d'Amérique) et de Colombie britannique (Canada) : structure, pétrologie et géochimie : implications dans l'évolution géodynamique des Cordillères nord-américaines et des processus d'accrétion continentale." Phd thesis, Université Joseph Fourier (Grenoble), 1996. http://tel.archives-ouvertes.fr/tel-00690779.
Повний текст джерелаRoberts, Sarah Elizabeth. "Breccia of Frog Lakes : reconstructing Triassic volcanism and subduction initiation in the east-central Sierra Nevada, California." Thesis, 2014. http://hdl.handle.net/1805/4085.
Повний текст джерелаThe Antler and Sonoma orogenies occurred along the southwest-trending passive Pacific margin of North America during the Paleozoic concluding with the accretion of the McCloud Arc. A southeast-trending sinistral transform fault truncated the continental margin in the Permian, becoming a locus for initiation of an east-dipping subduction zone creating the Sierran magmatic arc. Constrained in age between two early Triassic tuff layers, the volcanic clasts in the breccia of Frog Lakes represent one of the earliest records of mafic magmatism in the eastern Sierra Nevada. Tholeiitic rock clasts found in the breccia of Frog Lakes in the Saddlebag Lake pendant in the east central Sierra Nevada range in composition from 48% to 63% SiO2. Boninites produced by early volcanism of subduction initiation by spontaneous nucleation at the Izu-Bonin-Mariana arc are more depleted in trace element concentrations than the clasts while andesites from the northern volcanic zone of the Andes produced on crust 50 km thick have similar levels of enrichment and provide a better geochemical modern analogue. Textural analysis of the breccia of Frog Lakes suggest a subaqueous environment of deposition from a mature magmatic arc built on continental crust > 50 km thick during the Triassic. The monzodiorites of Saddlebag and Odell Lakes are temporal intrusive equivalents of the breccia of Frog Lakes and zircon geochemistry indicates a magmatic arc petrogenesis.
Titus, Sarah J. "Geological and geophysical investigation of two fine-grained granites, Sierra Nevada, California evidence for structural controls on volcanism /." 2002. http://catalog.hathitrust.org/api/volumes/oclc/51571503.html.
Повний текст джерелаTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 86-100).
Templeton, Jeffrey H. "Petrology of the reversely zoned Mickey Pass Tuff, west-central Nevada." Thesis, 1998. http://hdl.handle.net/1957/33567.
Повний текст джерелаFlint, Lorraine E. "Characterization of unsaturated zone hydrologic properties and their influence on lateral diversion in a volcanic tuff at Yucca Mountain, Nevada." Thesis, 2002. http://hdl.handle.net/1957/32771.
Повний текст джерелаGraduation date: 2002
Jeon, Seong Yeol 1972. "Dynamic and cyclic properties in shear of tuff specimens from Yucca Mountain, Nevada." Thesis, 2008. http://hdl.handle.net/2152/17873.
Повний текст джерелаChoi, Won Kyoung 1975. "Dynamic properties of ash-flow tuffs." Thesis, 2008. http://hdl.handle.net/2152/3991.
Повний текст джерелаtext