JD
Member Since 2006
Joe Dufek
Professor, University of Oregon
AGU Research
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Zircon Constraints on the Eruptive Sequence and Magma Evolution of Rhyolites at South Sister Volcano, Oregon
GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS
17 august 2024
Annika E. Dechert, Nathan L. Andersen, Josef Dufek...
We present 230Th‐238U crystallization ages and trace element compositions for zircons spanning the late Pleistocene to Holocene rhyolite erup...
Density Stratification and Buoyancy Evolution in Pyroclastic Density Currents
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
21 june 2024
Sean O'Donnell, Eric Breard, James L. Buttles, Jos...
Pyroclastic density currents (PDCs) are density‐stratified along their vertical axis, with the near‐bed portion being denser than the u...
A Generalized Townsend's Theory for Paschen Curves in Planar, Cylindrical, and Spherical Geometries in Planetary Atmospheres
JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES
08 april 2024
Jeremy Riousset, Joshua Mendez Harper, Josef Dufek...
In this work, we focus on plasma discharges produced between two electrodes with a high potential difference, resulting in the ionization of the ne...
Discerning the Cause of Multi-Decadal Subsidence Across the Edifice at Medicine Lake Volcano using Sentinel-1 InSAR Deformation Time-Series, a Bayesian MCMC Model Framework, and a Stochastic Dike Emplacement Thermal Model
GLOBAL APPLICATIONS OF VOLCANO GEODESY IV ELIGHTNING
geodesy | 14 december 2023
Rebecca Bussard, Josef Dufek, Meredith Townsend, C...
Intereruptive deformation at volcanoes can provide useful insights into long-term processes at and beneath the surface. One volcano that has experienc...
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Constraining Near-Vent Conduit Conditions of Enceladus Cryovolcanic Jets
ENCELADUS: FROM INNER WORKINGS TO THE POTENTIAL FOR LIFE I POSTER
planetary sciences | 14 december 2023
Paul V. Regensburger, Josef Dufek, Carol S. Paty
The cryovolcanic plumes on Enceladus provide a unique window into interior processes both within and beneath the ice shell. The South Polar Terrain is...
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Evolution of Magmatic Systems in Extensional Settings on Venus
VENUS EXPLORATION: SCIENCE AND TECHNOLOGY FOR EARTH’S HOTTER TWIN III ORAL
planetary sciences | 14 december 2023
Rudi Lien, Josef Dufek
Evidence for recent volcanism on Venus indicates that active sites are often spatially correlated with rift systems. Here, we investigate subsurface m...
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Deformation-Induced Thin Layer Stability: an Inspection into Compressibility and the Origins of Non-Local Effects in Granular Material
EXTREME VARIABILITY AND COMPLEXITY: BRIDGING THEORIES AND DATA-DRIVEN APPROACHES ACROSS SCALES, FROM URBAN GEOSCIENCES TO THE GEOSPACE III POSTER
nonlinear geophysics | 12 december 2023
Chris Harper, Josef Dufek, Eric Breard
Granular systems exhibit complex behavior such as self organized criticality, phase transitions, and non-local interactions. Despite such complexities...
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Evaluating the thermal-temporal evolution of the magma system at a stratovolcano: Comparing Holocene and Pleistocene rhyolites at South Sister Volcano, OR, USA, using zircon petrochronology
EVOLUTION OF TRANSCRUSTAL MAGMA PLUMBING SYSTEMS, VOLCANIC UNREST, AND ERUPTION STYLES: CHEMICAL, PHYSICAL, AND TEMPORAL PERSPECTIVES I POSTER
volcanology, geochemistry and petrology | 12 december 2023
Annika E. Dechert, Nathan L. Andersen, Josef Dufek
Zircon petrochronology utilized at large- and small-volume systems can distinguish chemical, thermal, spatial, and temporal characteristics of magmati...
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