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Thomas, Christine & Heyn, Björn Holger
(2024).
Imaging deep subducted lithosphere beneath the Indian Ocean with seismic source array recordings.
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Heyn, Björn Holger; Shephard, Grace & Conrad, Clinton Phillips
(2024).
Prolonged multi-phase volcanism in the Arctic induced by plume-lithosphere interaction.
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Heyn, Björn Holger & Conrad, Clinton Phillips
(2023).
Development and implications of a free base for numerical models.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Shephard, Grace
(2023).
Plume-lithosphere interaction and continental plume tracks.
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Shephard, Grace; Heyn, Björn Holger & Conrad, Clinton Phillips
(2023).
Prolonged multi-phase magmatism due to plume-lithosphere interaction as applied to the High Arctic Large Igneous Province.
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Heyn, Björn Holger; Shephard, Grace & Conrad, Clinton Phillips
(2023).
Locally amplified plume-lithosphere interaction and multiple melting events for 2-phase flow models.
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Heyn, Björn Holger; Shephard, Grace & Conrad, Clinton Phillips
(2023).
Amplification of sub-lithospheric dynamics by melt migration during plume-lithosphere interaction.
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Shephard, Grace; Heyn, Björn Holger & Conrad, Clinton Phillips
(2023).
Large-scale volcanism at the top of the world; plume and melt modelling of the High Arctic Large Igneous Province (HALIP).
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Heyn, Björn Holger
(2022).
Forskere har undersøkt to enorme, mystiske strukturer i jordens indre.
[Newspaper].
https://www.forskning.no/geologi/forskere-har-undersokt-to-e.
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Heyn, Björn Holger & Conrad, Clinton Phillips
(2022).
Basal erosion and surface heat flux anomalies associated with plume-lithosphere interaction beneath continents.
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Rolf, Tobias; Crameri, Fabio; Heyn, Björn Holger & Thielmann, Marcel
(2022).
Testing a (quasi-)free base for modelling core-mantle boundary topography.
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Shephard, Grace; Gaina, Carmen; Heyn, Björn Holger; Conrad, Clinton Phillips; Anfinson, Owen & Schaeffer, Andrew
[Show all 7 contributors for this article]
(2022).
Exploring potential lower mantle structures and interactions for the origins of HALIP.
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Heyn, Björn Holger & Conrad, Clinton Phillips
(2021).
Plume-induced heat flux anomalies and the associated thinning of the continental lithosphere.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2020).
How thermochemical piles initiate plumes at their edges.
European Geosci. Union, Gen. Assembly, Geophys. Res. Abstr..
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Heyn, Björn Holger; Conrad, Clinton Phillips & Selway, Kate
(2020).
Numerical constraints on heat flux variations and lithospheric thinning associated with passage of the Iceland plume beneath Greenland.
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Selway, Kate; Conrad, Clinton Phillips; Ramirez, Florence; Karlsson, Nanna B; Weerdesteijn, Maaike Francine Maria & Heyn, Björn Holger
(2020).
How magnetotellurics can aid cryosphere studies: mantle rheology, GIA, surface heat flow, and basal melting.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2020).
How thermochemical piles initiate plumes at their edges.
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Conrad, Clinton Phillips; Domeier, Mathew; Selway, Kate & Heyn, Björn Holger
(2020).
A link between seamount volcanism and thermochemical piles in the deepest mantle.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
What core-mantle boundary topography can tell us about plume locations and the viscosity and density structure of thermochemical piles.
European Geosci. Union, Gen. Assembly, Geophys. Res. Abstr..
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
Core-mantle boundary topography and its relation to lowermost mantle viscosity structure.
Ada Lovelace Workshop on Modelling Mantle and Lithosphere Dynamics. Abstr..
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
Periodic plume generation at the edges of thermochemical piles.
European Geosci. Union, Gen. Assembly, Geophys. Res. Abstr..
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Conrad, Clinton Phillips; Domeier, Mathew; Selway, Kate & Heyn, Björn Holger
(2019).
A link between seamount volcanism and thermochemical piles in the deepest mantle.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
Periodic plume generation at the edges of thermochemical piles.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
Core-mantle boundary topography and its relation to lowermost mantle viscosity structure.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
What core-mantle boundary topography can tell us about plume locations and the viscosity and density structure of thermochemical piles.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2019).
Linking surface volcanism and deep Earth: Piles, plumes, and dynamic topography.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2018).
Stabilization of thermochemical piles by compositional viscosity contrasts.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2018).
Stabilization of thermochemical piles by compositional viscosity contrasts. EGU Gen. Assembly, EGU2018-12950.
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Heyn, Björn Holger; Conrad, Clinton Phillips & Trønnes, Reidar G
(2017).
Stabilizing effect of a chemical viscosity contrast on LLSVP structures Abstr., Gordon Res. Conf. on Chemical and dynamical evolution of Earth's deep interior, from formation to today. Mount Holyoke College, South Hadley, MA.
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Heyn, Björn Holger & Conrad, Clinton Phillips
(2020).
Geodynamics of Earth’s Large Low Shear Velocity Provinces Interaction with mantle flow, plume initiation, and core-mantle boundary deformation.
Universitetet i Oslo.
ISSN 1501-7710.
Show summary
Our planet’s interior is actively convecting like boiling water in a pot, although on significantly larger length and time scales. In some locations, such as Hawaii and Iceland, one consequence of this convection is strong, long-lived volcanism that eventually creates island chains. But where does the erupted material come from, why is the volcano located at this specific spot, and what are the mechanisms to trigger this volcanism? To understand the origins of this Hawaiian-type volcanism, we have to dive deep into the interior of Earth, where the driving forces of convection are located.
This doctoral study uses numerical simulations to unravel how continent-sized piles of dense and potentially stiff material, residing about 2900 km beneath our feet, affect the formation of strong upwelling “plumes” that are thought to be associated with Hawaiian-type volcanism. Due to internal deformation, such piles periodically perturb a layer of hot material surrounding them, causing some material to rise and eventually erupt into volcanism. Moreover, this triggering mechanism causes a characteristic depression on the core-mantle boundary that may be used to constrain the properties of the deep Earth, and also locate newly emerging plumes before they erupt to the surface to produce Hawaiian-type volcanoes.
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Heyn, Björn Holger
(2020).
Geodynamics of Earth's Large Low Shear Velocity Provinces
Interaction with mantle flow, plume formation, and core-mantle boundary deformation.
Unipub forlag.
ISSN 1501-7710.
Full text in Research Archive
Show summary
Based on evidence from the geochemistry of ocean island volcanism, we know that the Earth’s mantle must be
heterogeneous on various scales, despite active convection for billions of years. Seismic tomography has shown that
there are two continent-sized regions of anomalously low seismic velocities at the base of the mantle, the so-called Large
Low Shear Velocity Provinces (LLSVPs), which likely represent piles of chemical heterogeneities resulting from magma
ocean crystallisation at the beginning of Earth’s history. Large-scale upwellings, so-called mantle plumes, and the
associated hotspot volcanism seem to cluster around these piles, which are presumably dense and potentially viscous due
to their composition. This thesis explores the importance of viscosity contrasts on the interaction between mantle flow,
mantle plumes and dense thermochemical piles. It demonstrates the importance of viscosity for entrainment of pile
material by plumes, and shows how piles interact with mantle flow to periodically generate plumes around their margins.
This interaction produces short-scale core-mantle boundary topography, which, if detected, should constrain the nature
and properties of LLSVPs.