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Showing 1 to 20 of 98 for “"Caldera"”.
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Evolutionary data assimilation at Long Valley Caldera, CA
… the recent unrest observed at Long Valley Caldera in California using GPS from 1995-2015 and InSAR data from 2012-2014. EDA performed reasonably well at finding the location of the chamber and estimating volume changes. However, due to the analytical Mogi model used and the inherent …
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The Valles Caldera: Recreationists' Perspectives on Access and Management
With the public acquisition of Valles Caldera National Preserve in 2000, Congress granted management to a Board of Trustees, a unique experiment in public land management. Ten years into the experiment, the trust model has been failing to meet certain management objectives and is under pressure by …
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Miocene extension and volcanism in the Caliente caldera complex, Lincoln County, Nevada
Includes bibliographical references.
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The petrology and geochemistry of Precaldera Magmas, Long Valley Caldera, Eastern California
Precaldera volcanism between 3.2-2.6 M.a. produced a basalt -trachybasalt -trachyandesite -quartz latite suite peripheral to the present Long Valley caldera from a heterogeneous, interactive, deep crustal magmatic -system. The suite consists of ( 1) widespread, predominately porphyritic …
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Evolution of a small silicic system: The McCullough Pass Caldera, Clark County, Nevada
The McCullough Pass Caldera is a small caldera in southern Nevada formed by the eruption of the McCullough Pass rhyolites. The McCullough Pass rhyolites erupted as three successive rhyolitic magma batches from 14.12 to 13.98 Ma and produced the McCullough Pass caldera. Each magma batch was …
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Gravity studies of the Guayabo Caldera and the Miravalles geothermal field, Costa Rica
… the sub-surface structure of the Guayabo caldera together with the related part of the Guanacaste Arc, and secondly to study the temporal evolution of the Miravalles Geothermal Field. Detailed density and stratigraphy studies of both the drilled and exposed geology have both complemented …
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Land Cover Change During a Transition in Land Management at Valles Caldera 1989-2013
… public lands management by creating the Valles Caldera National Preserve and its governing body, the Valles Caldera Trust (VCT). The management approach enacted by Valles Caldera Trust marked a significant departure in land-use intensity. To assess how these changes in management have affected …
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Diseño y simulación de un sistema de caldera basados en estándares y normas internacionales
… muestran los resultados de la simulación de una caldera con la finalidad de producir vapor a 2 MPa y 500 grados centígrados para tener aplicación en sistemas de cogeneración usando bagazo de caña de azúcar para ser implementados en ingenios azucareros, además se muestra la simulación de los …
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Prelude to the Tshirege caldera-forming eruption of the Bandelier magmatic system, New Mexico, USA
Two caldera-forming eruptions have occurred in the Bandelier magmatic system of the Jemez Mountains of northern New Mexico, the latter of which formed Valles caldera during the Tshirege eruption at 1232 ka. Despite no eruptions at Valles in the last ca. 70 kyr, the presence of partially molten …
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Seismic Tomography at Volcanic Rift Zones and Transpressional Plate Boundaries Askja Caldera and Macquarie Island
… imaging the seismic structure beneath Askja caldera, Iceland, located in a divergent tectonic setting, and Macquarie Island, south-west Pacific, that sits within an intra-oceanic transpressive regime. For decades, the presence or absence of a shallow magma body beneath Askja caldera has been …
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Geologic interpretations of seismic scattering and attenuation for the Cianten Caldera and the surrounding area
The Cianten Caldera in Indonesia is immediately adjacent to the producing portion of the Awibengkok geothermal field. The Cianten Caldera contains rocks similar to those in the Awibengkok field, however, the Cianten Caldera is not capable of producing geothermal power on a commercial scale. The …
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A GIS-Based Volcanic Hazard and Risk Assessment of Eruptions Sourced within Valles Caldera, New Mexico
<p>Valles caldera, in north-central New Mexico, is considered one of the largest rhyolitic volcanoes in the United States due to the great amount of volcanic activity over the last 1.61 Ma. Although Valles caldera is currently dormant, there is potential for future volcanic activity, and therefore …
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Seismic Q and velocity structure for the magma-hydrothermal system of the Valles Caldera, New Mexico
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Investigation into possible factors affecting the recruitment of Rocky Mountain elk on the Valles Caldera national preserve
The Valles Caldera National Preserve (VCNP) is a relatively new public land holding located in the Jemez Mountains in north-central New Mexico. For the past decade, low calf:cow ratios of elk (Cervus elaphus) have been recorded on the VCNP prompting concern by both the Valles Caldera Trust, the …
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The 2014-15 Bárðarbunga-Holuhraun magmatic rifting episode: A seismic study
… southeastern rim of the ice-covered Bárðarbunga caldera in central Iceland. Over the course of two weeks a dyke propagated 48 km beneath the glacier northeastwards and into the Holuhraun lava field, where it erupted for six months, becoming the largest eruption in Iceland for over 200 years. …
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Petrology and geochemistry of the recent eruption history at Rabaul Caldera, Papua New Guinea : implications for magmatic processes and recurring volcanic activity
… of the current (1994-2003) eruption at Rabaul Caldera occurred with synchronous vulcanian and vulcanian-plinian eruptions from Tavurvur and Vulcan, respectively, on opposing sides of the caldera. A second phase of activity (Phase 2), beginning on 28 November 1995 and continuing until the …
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