Browsing Institutt for geofag by Author "John, Timm"
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Incel, Sarah; Schubnel, Alexandre; Renner, Jörg; John, Timm; Labrousse, Loic; Hilairet, Nadège; Freeman, Helen; Wang, Yanbin; Renard, Francois; Jamtveit, Bjørn (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)The mechanisms triggering intermediate and deep earthquakes have puzzled geologists for several decades. There is still no consensus concerning whether such earthquakes are triggered by brittle or ductile mechanisms. We ...
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Zertani, Sascha; John, Timm; Tilmann, Frederik; Motra, Hem B.; Keppler, Ruth; Andersen, Torgeir Bjørge; Labrousse, Loic (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)Subduction zone processes and the resulting geometries at depth are widely studied by large- scale geophysical imaging techniques. The subsequent interpretations are dependent on information from surface exposures of fossil ...
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Zertani, Sascha; Vrijmoed, Johannes Christiaan; Tilmann, Frederik; John, Timm; Andersen, Torgeir Bjørge; Labrousse, Loic (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)eismological studies of large-scale processes at convergent plate boundaries typically probe lower crustal structures with wavelengths of several kilometers, whereas field-based studies typically sample the resulting ...
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Incel, Sarah; Labrousse, Loic; Hilairet, Nadège; John, Timm; Gasc, Julien; Shi, Feng; Wang, Yanbin; Andersen, Torgeir Bjørge; Renard, Francois; Jamtveit, Bjørn; Schubnel, Alexandre (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)Field observations and geophysical data reveal a causal link between brittle seismic failure and eclogitization of the lower continental crust. We present results from experimental deformation of plagioclase-rich samples ...
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Zertani, Sascha; John, Timm; Brachmann, Caroline; Vrijmoed, Johannes Christiaan; Plümper, Oliver (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Abstract Fluid flow in crystalline rocks in the absence of fractures or ductile shear zones dominantly occurs by grain boundary diffusion, as it is faster than volume diffusion. It is, however, unclear how reactive fluid ...
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Zertani, Sascha; Labrousse, Loic; John, Timm; Andersen, Torgeir Bjørge; Tilmann, Frederik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)The island of Holsnøy in the Bergen Arcs, which belong to the Caledonides of western Norway, represents an excellent example of how fluid‐induced eclogitization modifies material deeply buried by subduction and continental ...