Leif Karlstrom | University of Oregon (original) (raw)
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Papers by Leif Karlstrom
Eos Transactions American Geophysical Union
The generation, accumulation and eruption of silicic magmas in the shallow crust occurs on a wide... more The generation, accumulation and eruption of silicic magmas in the shallow crust occurs on a wide range of length and timescales. Here we focus on two questions related to these interrelated processes: 1.) What are the energy and dynamic constraints for the relative proportions of crustal and mantle melts in the production of silicic systems? 2.) What processes can alleviate the so called "room problem", and how does this contribute to the longevity of the system? We address the first two questions through a coupled finite volume and finite element approach to determine the evolving thermal and stress fields in response to magma injection in the upper crust. We perform a suite of two- dimensional simulations over a range of magmatic fluxes and different regional stresses. To constrain the volume and depth of assimilation of crustal materials we also perform oxygen isotope calculations that are coupled with the evolving thermal and permeability structure of the crust. The r...
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We present a model for the development of discrete volcanic centers via melt focusing by magma ch... more We present a model for the development of discrete volcanic centers via melt focusing by magma chambers. We apply this model to the spacing of Tharsis Montes shield volcanoes, and test the effects of Tharsis loading and True Polar Wander stresses.
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Journal of Geophysical Research: Solid Earth, 2013
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Journal of Geophysical Research: Earth Surface, 2013
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Nature Geosci, 2012
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J. Geophys. Res. Solid Earth, 2013
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Nature Communications, 2014
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The enormous size, chemical homogeneity and rapid emplacement of individual Large Igneous Provinc... more The enormous size, chemical homogeneity and rapid emplacement of individual Large Igneous Province (LIP) eruptions exemplify basaltic volcanism on its most extreme scale. We believe that these features are also evidence for an underappreciated aspect of volcano physics, in which exsolution of volatile species provide a driving force that can sustain mafic eruptions past the cessation of magmatic overpressure and
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The largest silicic and mafic volcanic eruptions in the geologic record, Supervolcano and Large I... more The largest silicic and mafic volcanic eruptions in the geologic record, Supervolcano and Large Igneous Province (LIP) eruptions, are distinguished by differences in surface emplacement mode, geologic context, magma volatile content, viscosity, and reservoir depth. However, these large eruptions also share several common features. Individual eruptions of both types emplace roughly the same total volume (10^3 - 10^4 km^3) of
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Eos Transactions American Geophysical Union
The generation, accumulation and eruption of silicic magmas in the shallow crust occurs on a wide... more The generation, accumulation and eruption of silicic magmas in the shallow crust occurs on a wide range of length and timescales. Here we focus on two questions related to these interrelated processes: 1.) What are the energy and dynamic constraints for the relative proportions of crustal and mantle melts in the production of silicic systems? 2.) What processes can alleviate the so called "room problem", and how does this contribute to the longevity of the system? We address the first two questions through a coupled finite volume and finite element approach to determine the evolving thermal and stress fields in response to magma injection in the upper crust. We perform a suite of two- dimensional simulations over a range of magmatic fluxes and different regional stresses. To constrain the volume and depth of assimilation of crustal materials we also perform oxygen isotope calculations that are coupled with the evolving thermal and permeability structure of the crust. The r...
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We present a model for the development of discrete volcanic centers via melt focusing by magma ch... more We present a model for the development of discrete volcanic centers via melt focusing by magma chambers. We apply this model to the spacing of Tharsis Montes shield volcanoes, and test the effects of Tharsis loading and True Polar Wander stresses.
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Journal of Geophysical Research: Solid Earth, 2013
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Journal of Geophysical Research: Earth Surface, 2013
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Nature Geosci, 2012
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J. Geophys. Res. Solid Earth, 2013
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Nature Communications, 2014
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The enormous size, chemical homogeneity and rapid emplacement of individual Large Igneous Provinc... more The enormous size, chemical homogeneity and rapid emplacement of individual Large Igneous Province (LIP) eruptions exemplify basaltic volcanism on its most extreme scale. We believe that these features are also evidence for an underappreciated aspect of volcano physics, in which exsolution of volatile species provide a driving force that can sustain mafic eruptions past the cessation of magmatic overpressure and
Bookmarks Related papers MentionsView impact
The largest silicic and mafic volcanic eruptions in the geologic record, Supervolcano and Large I... more The largest silicic and mafic volcanic eruptions in the geologic record, Supervolcano and Large Igneous Province (LIP) eruptions, are distinguished by differences in surface emplacement mode, geologic context, magma volatile content, viscosity, and reservoir depth. However, these large eruptions also share several common features. Individual eruptions of both types emplace roughly the same total volume (10^3 - 10^4 km^3) of
Bookmarks Related papers MentionsView impact
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