Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Geochemistry of Archean komatiitic greenstone terranes of the Wyoming Province: Implications for geodynamic setting and mineralization Geochemistry of Archean komatiitic greenstone terranes of the Wyoming Province: Implications for geodynamic setting and mineralization
No abstract available.
Authors
Lisa Joanne Zieman, Jacob Evan Poletti, Michael Jenkins
A multi-methodological approach: Combining textural observations and geochronology to study the J-M Reef Package and its Hanging Wall, Stillwater Complex, Montana A multi-methodological approach: Combining textural observations and geochronology to study the J-M Reef Package and its Hanging Wall, Stillwater Complex, Montana
No abstract available.
Authors
Michael Jenkins, Sam R. Corson, Ennis Geraghty, S.L. Kamo, Heather A. Lowers, James E. Mungall
Permafrost history in the sporadic zone as context for recent carbon loss using acryostratigraphy, plant macrofossil, and stable isotope approach Permafrost history in the sporadic zone as context for recent carbon loss using acryostratigraphy, plant macrofossil, and stable isotope approach
Permafrost and landscape history, in addition to ground ice content, are increasingly identified as important components in predicting permafrost thaw trajectories. Together with cryostratigraphy, plant remains and stable isotopes can provide useful information about past permafrost aggradation and thaw. We applied these methods with radiocarbon dating on peat and permafrost cores in the...
Authors
Miriam C. Jones, Lesleigh Anderson, Eva Anne Stephani, Benjamin M. Jones
Framework for implementing damping scaling factors in U.S. Geological Survey National Seismic Hazard Models Framework for implementing damping scaling factors in U.S. Geological Survey National Seismic Hazard Models
Traditionally, probabilistic seismic hazard analysis (PSHA) has focused on calculating ground motion hazard curves for elastic, 5%-damped pseudo spectral accelerations, Sa(T,5%), which are used as the basis for engineering design parameters and targets for ground motion selection and modification. However, structures and geotechnical systems can exhibit a wide range of damping ratios...
Authors
Andrew James Makdisi, Dallin Smith, Sanaz Rezaeian, Peter M. Powers, Kyle Withers
Effects of stochastically-simulated near-fault ground motions on soil liquefaction Effects of stochastically-simulated near-fault ground motions on soil liquefaction
The scarcity of historically recorded near-fault ground motions poses a challenge to systematically understanding the influence of near-fault effects on various types of seismic demands for engineering purposes. In particular, the current state of knowledge of the influence of ground-shaking intensity on soil liquefaction and its consequences does not specifically account for the effects...
Authors
Andrew James Makdisi, Mayssa Dabaghi, Lianne Brito Silveira, Sanaz Rezaeian, Kirstie Lafon Haynie, Henry Mason
2024 Crustal Deformation Modeling Workshop report 2024 Crustal Deformation Modeling Workshop report
The 2024 Crustal Deformation Modeling Workshop was held June 10–14 at the Colorado School of Mines. The workshop included two days of tutorials on using PyLith for crustal deformation modeling, followed by three days of science talks and discussions. The workshop focused on four primary themes: ● Constraining long-term fault slip rates and their uncertainties using geodetic and geologic...
Authors
Brad T. Aagaard, Matthew Knepley, Eric Lindsey, Kathryn Materna, Hilary R Martens, Charles Williams
Impacts of convective storms on runoff, erosion, and carbon export in a continuous permafrost landscape Impacts of convective storms on runoff, erosion, and carbon export in a continuous permafrost landscape
Permafrost holds more than twice the amount of carbon currently in the atmosphere, but this large carbon reservoir is vulnerable to thaw and erosion under a rapidly changing Arctic climate. Convective storms are becoming increasingly common during Arctic summers and can amplify runoff and erosion. These extreme events, in concert with active layer deepening, may accelerate carbon loss...
Authors
Marisa Repasch, Josie Arcuri, Irina Overeem, Suzanne P. Anderson, Robert G. Anderson, Joshua C. Koch
Thermo-hydrologic processes governing supra-permafrost talik dynamics in discontinuous permafrost near Umiujaq (Québec, Canada) Thermo-hydrologic processes governing supra-permafrost talik dynamics in discontinuous permafrost near Umiujaq (Québec, Canada)
Widespread supra-permafrost talik formation is currently recognized as a critical mechanism that could accelerate permafrost thaw in the Arctic (e.g., Connon et al. 2018; Farquharson et al. 2022). However, the trajectory of permafrost dynamics following talik formation may prove difficult to predict. Physically-based cryohydrogeologic models provide a powerful tool for understanding...
Authors
Philippe Fortier, Nathan Young, Michelle A. Walvoord, Jean-Michel Lemieux, Aaron Mohammed
A history of cryohydrogeology modeling and recent advancements through the integration of solute transport A history of cryohydrogeology modeling and recent advancements through the integration of solute transport
Groundwater flow systems and permafrost are interrelated because permafrost thaw enhances permeability, while groundwater flow can advect heat and accelerate permafrost thaw (McKenzie et al. 2021). Given amplified climate change in cold regions, there is renewed interest in ‘cryohydrogeology’, the study of groundwater in cold regions. Many data-driven studies have shown that permafrost...
Authors
Barret L. Kurylyk, Julia Guimond, Aaron Mohammed, Victor F. Bense, Jeffrey M. McKenzie, Michelle A. Walvoord, Rob Jamieson, R. Bailey Strong
Thermal and hydrological limitations on modeling carbon dynamics at wetland sites of discontinuous and continuous permafrost extent Thermal and hydrological limitations on modeling carbon dynamics at wetland sites of discontinuous and continuous permafrost extent
Accurate representation of cryohydrological processes is fundamental for biosphere models, particularly at high-latitudes, given their influence on carbon and permafrost dynamics in carbon-rich peatlands and wetlands. This study analyzes site-level simulations in moist and wet drainage conditions in continuous or discontinuous permafrost regions, using a terrestrial ecosystem model DVM...
Authors
Benjamin C. Maglio, Ruth Rutter, Tobey Carman, Colin W. Edgar, Eugénie S. Euskirchen, Hélène Genet, Andrew Mullen, Valeria Briones, Elchin Jafarov, Kristen L. Manies
Hydrogen systems and reactive transport modelling: An approach to natural hydrogen exploration Hydrogen systems and reactive transport modelling: An approach to natural hydrogen exploration
No abstract available.
Authors
Geoffrey S. Ellis, Daniel Palmowski, Nicolas Lefeuvre