Finn forfatter "Magni, Valentina"

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  • A transdisciplinary and community-driven database to unravel subduction zone initiation 
    Crameri, Fabio; Magni, Valentina; Domeier, Mathew; Shephard, Grace Elizabeth; Chotalia, Kiran; Cooper, George; Eakin, Caroline; Grima, Antoniette Greta; Gurer, Derya; Kiraly, Agnes; Mulyukova, Elvira; Peters, Kalijn; Robert, Boris; Thielmann, Marcel (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Subduction zones are pivotal for the recycling of Earth’s outer layer into its interior. However, the conditions under which new subduction zones initiate are enigmatic. Here, we constructed a transdisciplinary database ...
  • Continental underplating after slab break-off 
    Magni, Valentina; Allen, Mark B.; van Hunen, Jeroen; Bouilhol, Pierre (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We present three-dimensional numerical models to investigate the dynamics of continental collision, and in particular what happens to the subducted continental lithosphere after oceanic slab break-off. We find that in some ...
  • Curved orogenic belts, back-arc basins, and obduction as consequences of collision at irregular continental margins 
    Schliffke, Nicholas; van Hunen, Jeroen; Gueydan, Frédéric; Magni, Valentina; Allen, Mark B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Continental collisions commonly involve highly curved passive plate margins, leading to diachronous continental subduction during trench rollback. Such systems may feature back-arc extension and ophiolite obduction postdating ...
  • Deep water cycling and sea level change since the breakup of Pangea 
    Karlsen, Krister Stræte; Conrad, Clinton Phillips; Magni, Valentina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    First‐order variations in sea level exhibit amplitudes of ∼200 m over periods that coincide with those of supercontinental cycles (∼300–500 Myr). Proposed mechanisms for this sea level change include processes that change ...
  • The effects of back-arc spreading on arc magmatism 
    Magni, Valentina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Mantle flow is a key feature that can affect melt production and composition in and around subduction zones. In this study, I use three-dimensional numerical models to investigate the role of mantle flow on subduction-related ...
  • Episodic back-arc spreading centre jumps controlled by transform fault to overriding plate strength ratio 
    Schliffke, Nicholas; van Hunen, Jeroen; Allen, Mark B.; Magni, Valentina; Gueydan, Frédéric (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Spreading centre jumps are a common feature of oceanic back-arc basins. Jumps are conventionally suggested to be triggered by plate velocity changes, pre-existing weaknesses, or punctuated events such as the opening ...
  • Episodic zircon age spectra mimic fluctuations in subduction 
    Domeier, Mathew; Magni, Valentina; Hounslow, Mark W.; Torsvik, Trond Helge (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Decades of geochronological work have shown the temporal distribution of zircon ages to be episodic on billion-year timescales and seemingly coincident with the lifecycle of supercontinents, but the physical processes ...
  • The formation of continental fragments in subduction settings: the importance of structural inheritance and subduction system dynamics 
    van den Broek, Joost Martijn; Magni, Valentina; Gaina, Carmen; Buiter, Susanne (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Microcontinents and continental fragments are pieces of continental lithosphere, formed by extension and breakup, followed by plate boundary relocations. Microcontinents or continental fragments affiliated with passive ...
  • Influence of the Thickness of the Overriding Plate on Convergence Zone Dynamics 
    Hertgen, Solenn; Yamato, Philippe; Guillaume, Benjamin; Magni, Valentina; Schliffke, Nicholas; van Hunen, Jeroen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The important role played by the upper plate in convergence zones dynamics has long been underestimated but is now more and more emphasized. However, the influence of its thickness and/or strength on orogenic systems ...
  • Interaction between mantle-derived magma and lower arc crust: quantitative reactive melt flow modelling using STyx 
    Riel, Nicolas; Bouilhol, Pierre; van Hunen, Jeroen; Cornet, Julien; Magni, Valentina; Grigorova, Vili; Velic, Mirko (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The magmatic processes occurring in the lowermost arc crust play a major role in the evolution of mantle-wedge-derived melt. Geological evidence indicates that mantle-derived magmas and in-situ products of lower crust ...
  • Plate tectonics: Crustal recycling evolution 
    Magni, Valentina (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    The processes that form and recycle continental crust have changed through time. Numerical models reveal an evolution from extensive recycling on early Earth as the lower crust peeled away, to limited recycling via slab ...
  • Ridge Jumps and Mantle Exhumation in Back-Arc Basins 
    Magni, Valentina; Naliboff, John; Prada, Manel; Gaina, Carmen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Back-arc basins in continental settings can develop into oceanic basins, when extension lasts long enough to break up the continental lithosphere and allow mantle melting that generates new oceanic crust. Often, the basement ...
  • The Effect of Magma Poor and Magma Rich Rifted Margins on Continental Collision Dynamics 
    Turino, V.; Magni, Valentina; Kjøll, Hans Jørgen; Jakob, Johannes (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract The transition between non‐rifted continental lithosphere and oceanic lithosphere in rifted margins can display a wide range of characteristics, depending on the regional tectonic evolution. The velocity and ...
  • The Role of Crustal Buoyancy in the Generation and Emplacement of Magmatism During Continental Collision 
    Schliffke, Nicholas; van Hunen, Jeroen; Magni, Valentina; Allen, Mark B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    During continental collision, considerable amounts of buoyant continental crust subduct to depth and subsequently exhume. Whether various exhumation paths contribute to contrasting styles of magmatism across modern collision ...