Charles Connor - Profile on Academia.edu (original) (raw)
Papers by Charles Connor
Aspects of volcanic hazard assessment for the Bataan nuclear power plant, Luzon Peninsula, Philippines
Volcanic and Tectonic Hazard Assessment for Nuclear Facilities, 2009
The interaction between magma and groundwater can play a pivotal role in volcanic eruptions. The ... more The interaction between magma and groundwater can play a pivotal role in volcanic eruptions. The location and style of this interaction is strongly affected by both the local and regional geological structures. By creating TOUGH2 models based on interpretations of magnetic data, and comparing model outputs with self-potential and CO 2 profiles, we were able to identify small-scale sealing faults dipping at 60° that redirect upward fluid flow. On a more regional scale, convection within the saturated zone along a 3-4 km fault on the flank of the Masaya Volcano can explain the diffuse degassing patterns seen at the surface. TOUGH2 models therefore allow us to improve understanding of the volcano-hydrologic system, its surface expressions, and its dominant controls, an understanding vital for improved eruption forecasting.
N. Matsushima, K. Kazahaya, G. Saito and H. Shinohara........................................... 285 Eocene melting of Precambrian lithospheric mantle: Analcime-bearing volcanic rocks from the Challis^ Kamloops belt of south central British Columbia J. Dostal, K. Breitsprecher, BN Church, D. Thor...
Hydrology and Land Surface Studies-HLS 2-Self-potential, soil C02 flux, and temperature on Masaya volcano, Nicaragua (DOI 10.1029/2003GLO17731)
Geology and Rheology of Intraplate Continental Volcanic Conduits: San Rafael Subvolcanic Field, Utah
ABSTRACT Several volcanic conduits are exceptionally well exposed in the San Rafael subvolcanic f... more ABSTRACT Several volcanic conduits are exceptionally well exposed in the San Rafael subvolcanic field, located in the northeast corner of the Colorado Plateau, Utah. The depth of exposure of these basaltic intrusions ranges from 500 to 2000 m, constrained from stratigraphy .A number of geochemical and micro-structural profiles were carried out across the conduits to characterize the rheology and wall-rock assimilation processes taking place within the volcanic conduits. Our results indicate a strong interaction of the rising basaltic magma with the surrounding host sediments, suggesting mechanical erosion plays an important role in the volcanic conduit development. Detailed field observations and petrographical examination of microstructures and thermal effect signatures within the wallrock indicates viscous flow as a result of the shear stress exerted by the upward flowing magma. Deformation maps were constructed to address the deformation mechanisms involved in the deformation of the conduit walls. We also conducted detailed mineral chemistry, bulk rock and petrographic analysis to constrain the temperature attained by the wallrocks. With these rheological and mineralogical observations, using fluid dynamical and heat transfer models, we report minimum basalt magma flow time through the conduits.
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Intrusion dynamics for volatile-poor basaltic magma into subsurface nuclear installations
QUANTIFICATION OF THE SPATIAL RELATIONSHIPS BETWEEN POPULATIONS OF FAULTS AND VOLCANOES: ASSESSING THE RELATIVE ROLES OF SOURCE GEOMETRY AND UPPER CRUSTAL STRUCTURE on THE DISTRIBUTION OF VENTS
WETMORE, Paul H. 1, CAPLINGER, Michelle 1, CONNOR, Laura 1, BEESON, Jeff 2, BOYKO, William 1, and... more WETMORE, Paul H. 1, CAPLINGER, Michelle 1, CONNOR, Laura 1, BEESON, Jeff 2, BOYKO, William 1, and CONNOR, Charles B. 3,(1) Department of Geology, University of South Florida, 4202 E. Fowler Ave, SCA 528, Tampa, FL 33620, pwetmore@ cas. usf. edu, ...
Unfaulting the Sardarapat Ridge, Southwest Armenia
Discrete Element Modeling of Volcanic Pyroclasts: Cone Construction and Impact Sags
Monogenetic volcanic hazards and assessment
Development and relationship of monogenetic and polygenetic volcanic fields in time and space
High Resolution Magnetic and Gravity Surveys to Constrain Maar Geometry and Eruption Mechanisms, Rattlesnake Crater, Arizona
ABSTRACT Located 25 kilometers east of Flagstaff, Arizona, Rattlesnake Crater is an oblong phreat... more ABSTRACT Located 25 kilometers east of Flagstaff, Arizona, Rattlesnake Crater is an oblong phreatomagmatic feature in the San Francisco Volcanic Field. The shallow crater is approximately 1.4 kilometers at its widest point, and surrounded by an uneven tuff ring which is overlapped by a scoria cone volcano on the southeastern side. Improved understanding of its formation and evolution requires geophysical study because there are very few outcrops, and no digging is permitted on site. Geologic features related to the crater are further obscured by deposits from the overlapping scoria cone, as well as tephra from eruptions at nearby Sunset Crater. We present the results of a detailed magnetic and gravity survey in and around Rattlesnake Crater. A substantial NW-SE trending elongate magnetic anomaly (1400 nT) and a smaller similarly trending anomaly are observed inside the crater, as well as a longer wavelength positive gravitational anomaly (+1.0-1.5 mGal) across the crater. The magnetic survey was completed on foot with a 50 meter line spacing inside the crater, and 100 meter line spacing across a portion of the surrounding area outside the crater. The gravity survey was done on two intersecting survey lines - one running west to east, and another roughly north to south, with recordings every 100 meters extending at least 1000 meters outside the crater in all four directions. 2D models of the magnetic and gravity data are presented illustrating the possible geometry of the diatreme, and the approximate size and shape of the major intrusive features. Eruption estimates based on the models are calculated, and the models are favorably compared to the size and depth estimates given in a recent publication (Valentine 2012) that used xenolith content to estimate the size and depth of the diatreme.
A LiDAR Survey of an Exposed Magma Plumbing System in the San Rafael Desert, Utah
Scoria Cone and Tuff Ring Stratigraphy Interpreted from Ground Penetrating Radar, Rattlesnake Crater, Arizona
LiDAR observations of an Earth magmatic plumbing system as an analog for Venus and Mars distributed volcanism
Developing Sustainable Models of Volcanic Processes on the Shared VHub Platform
A finite element modeling investigation on the effects of magma underplating on topographic variation and exhumation rates over long time scales
A New Way to estimate volcanic hazards and present multi-hazard maps
Aspects of volcanic hazard assessment for the Bataan nuclear power plant, Luzon Peninsula, Philippines
Volcanic and Tectonic Hazard Assessment for Nuclear Facilities, 2009
The interaction between magma and groundwater can play a pivotal role in volcanic eruptions. The ... more The interaction between magma and groundwater can play a pivotal role in volcanic eruptions. The location and style of this interaction is strongly affected by both the local and regional geological structures. By creating TOUGH2 models based on interpretations of magnetic data, and comparing model outputs with self-potential and CO 2 profiles, we were able to identify small-scale sealing faults dipping at 60° that redirect upward fluid flow. On a more regional scale, convection within the saturated zone along a 3-4 km fault on the flank of the Masaya Volcano can explain the diffuse degassing patterns seen at the surface. TOUGH2 models therefore allow us to improve understanding of the volcano-hydrologic system, its surface expressions, and its dominant controls, an understanding vital for improved eruption forecasting.
N. Matsushima, K. Kazahaya, G. Saito and H. Shinohara........................................... 285 Eocene melting of Precambrian lithospheric mantle: Analcime-bearing volcanic rocks from the Challis^ Kamloops belt of south central British Columbia J. Dostal, K. Breitsprecher, BN Church, D. Thor...
Hydrology and Land Surface Studies-HLS 2-Self-potential, soil C02 flux, and temperature on Masaya volcano, Nicaragua (DOI 10.1029/2003GLO17731)
Geology and Rheology of Intraplate Continental Volcanic Conduits: San Rafael Subvolcanic Field, Utah
ABSTRACT Several volcanic conduits are exceptionally well exposed in the San Rafael subvolcanic f... more ABSTRACT Several volcanic conduits are exceptionally well exposed in the San Rafael subvolcanic field, located in the northeast corner of the Colorado Plateau, Utah. The depth of exposure of these basaltic intrusions ranges from 500 to 2000 m, constrained from stratigraphy .A number of geochemical and micro-structural profiles were carried out across the conduits to characterize the rheology and wall-rock assimilation processes taking place within the volcanic conduits. Our results indicate a strong interaction of the rising basaltic magma with the surrounding host sediments, suggesting mechanical erosion plays an important role in the volcanic conduit development. Detailed field observations and petrographical examination of microstructures and thermal effect signatures within the wallrock indicates viscous flow as a result of the shear stress exerted by the upward flowing magma. Deformation maps were constructed to address the deformation mechanisms involved in the deformation of the conduit walls. We also conducted detailed mineral chemistry, bulk rock and petrographic analysis to constrain the temperature attained by the wallrocks. With these rheological and mineralogical observations, using fluid dynamical and heat transfer models, we report minimum basalt magma flow time through the conduits.
Formatted Citation Show HTML Likes (beta)
Intrusion dynamics for volatile-poor basaltic magma into subsurface nuclear installations
QUANTIFICATION OF THE SPATIAL RELATIONSHIPS BETWEEN POPULATIONS OF FAULTS AND VOLCANOES: ASSESSING THE RELATIVE ROLES OF SOURCE GEOMETRY AND UPPER CRUSTAL STRUCTURE on THE DISTRIBUTION OF VENTS
WETMORE, Paul H. 1, CAPLINGER, Michelle 1, CONNOR, Laura 1, BEESON, Jeff 2, BOYKO, William 1, and... more WETMORE, Paul H. 1, CAPLINGER, Michelle 1, CONNOR, Laura 1, BEESON, Jeff 2, BOYKO, William 1, and CONNOR, Charles B. 3,(1) Department of Geology, University of South Florida, 4202 E. Fowler Ave, SCA 528, Tampa, FL 33620, pwetmore@ cas. usf. edu, ...
Unfaulting the Sardarapat Ridge, Southwest Armenia
Discrete Element Modeling of Volcanic Pyroclasts: Cone Construction and Impact Sags
Monogenetic volcanic hazards and assessment
Development and relationship of monogenetic and polygenetic volcanic fields in time and space
High Resolution Magnetic and Gravity Surveys to Constrain Maar Geometry and Eruption Mechanisms, Rattlesnake Crater, Arizona
ABSTRACT Located 25 kilometers east of Flagstaff, Arizona, Rattlesnake Crater is an oblong phreat... more ABSTRACT Located 25 kilometers east of Flagstaff, Arizona, Rattlesnake Crater is an oblong phreatomagmatic feature in the San Francisco Volcanic Field. The shallow crater is approximately 1.4 kilometers at its widest point, and surrounded by an uneven tuff ring which is overlapped by a scoria cone volcano on the southeastern side. Improved understanding of its formation and evolution requires geophysical study because there are very few outcrops, and no digging is permitted on site. Geologic features related to the crater are further obscured by deposits from the overlapping scoria cone, as well as tephra from eruptions at nearby Sunset Crater. We present the results of a detailed magnetic and gravity survey in and around Rattlesnake Crater. A substantial NW-SE trending elongate magnetic anomaly (1400 nT) and a smaller similarly trending anomaly are observed inside the crater, as well as a longer wavelength positive gravitational anomaly (+1.0-1.5 mGal) across the crater. The magnetic survey was completed on foot with a 50 meter line spacing inside the crater, and 100 meter line spacing across a portion of the surrounding area outside the crater. The gravity survey was done on two intersecting survey lines - one running west to east, and another roughly north to south, with recordings every 100 meters extending at least 1000 meters outside the crater in all four directions. 2D models of the magnetic and gravity data are presented illustrating the possible geometry of the diatreme, and the approximate size and shape of the major intrusive features. Eruption estimates based on the models are calculated, and the models are favorably compared to the size and depth estimates given in a recent publication (Valentine 2012) that used xenolith content to estimate the size and depth of the diatreme.
A LiDAR Survey of an Exposed Magma Plumbing System in the San Rafael Desert, Utah
Scoria Cone and Tuff Ring Stratigraphy Interpreted from Ground Penetrating Radar, Rattlesnake Crater, Arizona
LiDAR observations of an Earth magmatic plumbing system as an analog for Venus and Mars distributed volcanism
Developing Sustainable Models of Volcanic Processes on the Shared VHub Platform
A finite element modeling investigation on the effects of magma underplating on topographic variation and exhumation rates over long time scales
A New Way to estimate volcanic hazards and present multi-hazard maps