U. Altenberger, Strain localization mechanisms in deep-seated layered rocks, Geol. 582 Rundschau, vol.86, pp.56-68, 1997.

M. Beltrando, R. Compagnoni, S. Ferrando, G. Mohn, G. Frasca et al., , p.584

Z. Vokmanovi? and E. Masini, Crustal thinning and mantle exhumation in the 585 Levone area (Southern Canavese Zone, Western Alps), in: A Field Guide Across the 586 Margins of Alpine Tethys, J. Virtual Explor, vol.48, 2015.

M. Beltrando, G. Manatschal, G. Mohn, G. V. Dal-piaz, A. Vitale-brovarone et al., Recognizing remnants of magma-poor rifted margins in high-pressure orogenic 590 belts: The Alpine case study, Earth-Science Rev, vol.589, pp.88-115, 2014.

M. Beltrando, D. F. Stockli, A. Decarlis, and G. Manatschal, A crustal-scale view at rift 593 localization along the fossil Adriatic margin of the Alpine Tethys preserved in NW Italy, 594 Tectonics, vol.34, pp.1927-1951, 2015.

M. Beltrando, I. Zibra, A. Montanini, and R. Tribuzio, Crustal thinning and exhumation 596 along a fossil magma-poor distal margin preserved in Corsica: A hot rift to drift 597 transition? Lithos 168-169, pp.99-112, 2013.

G. Bertotti, V. Picotti, D. Bernoulli, and A. Castellarin, From rifting to drifting: tectonic 599 evolution of the South-Alpine upper crust from the Triassic to the Early Cretaceous, 1993.

, Sediment. Geol, vol.86, pp.53-76

T. Bissig and J. Hermann, From pre-Alpine extension to Alpine convergence: the example 602 of the southwestern margin of the Margna nappe (Val Malenco, N-Italy), Schweizerische 603 Mineral. und Petrogr. Mitteilungen, vol.79, pp.363-380, 1999.

K. H. Brodie, D. Rex, and E. H. Rutter, On the age of deep crustal extensional faulting in 605 the Ivrea zone, northern Italy, vol.45, pp.203-210, 1989.

J. P. Brun and M. O. Beslier, Mantle exhumation at passive margins, Earth Planet. Sci, 1996.

. Lett, , vol.142, pp.80-85

J. P. Brun and P. R. Cobbold, Strain heating and thermal softening in continental shear 609 zones: a review, J. Struct. Geol, vol.2, pp.149-158, 1980.

H. Büchi, Der variskiscke Magmatismus in der östlichen Bernina, Schweizerische 611 Mineral. und Petrogr. Mitteilungen, vol.74, pp.359-371, 1994.

N. L. Carter and M. C. Tsenn, Flow properties of continental lithosphere, Tectonophysics, vol.613, issue.136, pp.90333-90340, 1987.

C. Clerc, L. Jolivet, and J. Ringenbach, Ductile extensional shear zones in the lower 615 crust of a passive margin, Earth Planet. Sci. Lett, vol.431, pp.1-7, 2015.

C. Clerc and Y. Lagabrielle, Thermal control on the modes of crustal thinning leading to 618 mantle exhumation: Insights from the Cretaceous Pyrenean hot paleomargins, Tectonics, vol.619, pp.1340-1359, 2014.

C. Clerc, J. Ringenbach, L. Jolivet, and J. Ballard, Rifted margins: Ductile 621 deformation, boudinage, continentward-dipping normal faults and the role of the weak 622 lower crust, Gondwana Res, vol.53, pp.20-40, 2018.

P. Chenin, S. M. Schmalholz, G. Manatschal, and G. D. Karner, Necking of the 624 Lithosphere: A Reappraisal of Basic Concepts With Thermo-Mechanical Numerical 625, 2018.

. Modeling, J. Geophys. Res. Solid Earth, vol.123, pp.5279-5299

J. K. Davis and L. L. Lavier, Influences on the development of volcanic and magma-poor 627 morphologies during passive continental rifting, Geosphere, vol.13, pp.1524-1540, 2017.

A. Decarlis, M. Beltrando, G. Manatschal, S. Ferrando, and R. Carosi, Architecture of 630 the Distal Piedmont-Ligurian Rifted Margin in NW Italy: Hints for a Flip of the Rift 631 System Polarity, Tectonics, vol.36, pp.2388-2406, 2017.

G. Demarchi, J. E. Quick, S. Sinigoi, and A. Mayer, Pressure gradient and original 633 orientation of a lower-crustal intrusion in the Ivrea-Verbano zone, Northern Italy, J, p.634, 1998.

, Geol, vol.106, pp.609-622

J. F. Dewey and J. M. Bird, Mountain belts and the new global tectonics, J. Geophys. Res, vol.636, pp.2625-2647, 1970.

T. Duretz, D. A. May, and P. Yamato, A free surface capturing discretization for the 638 staggered grid finite difference scheme, Geophys. J. Int, vol.204, pp.1518-1530, 2016.

T. Duretz, B. Petri, G. Mohn, S. M. Schmalholz, F. L. Schenker et al., The 640 importance of structural softening for the evolution and architecture of passive margins, 2016.

, Sci. Rep, vol.6, p.38704

G. P. Eberli, The evolution of the southern continental margin of the Jurassic Tethys 643 Ocean as recorded in the Allgäu Formation of the Austroalpine Nappes of Graubünden 644 (Switzerland), Eclogae Geol. Helv, vol.81, pp.175-214, 1988.

M. Epin, G. Manatschal, and M. Amann, Defining diagnostic criteria to describe the 646 role of rift inheritance in collisional orogens: the case of the Err-Platta nappes 647 (Switzerland), Swiss J. Geosci, vol.110, pp.419-438, 2017.

S. Ferrando, D. Bernoulli, and R. Compagnoni, The Canavese zone, p.649, 2004.

, Alps): a distal margin of Adria, Schweizerische Mineral. und Petrogr. Mitteilungen, vol.84, pp.650-237

F. Gerald, J. D. Stünitz, and H. , Deformation of granitoids at low metamorphic grade. I: 652 Reactions and grain size reduction, Tectonophysics, vol.221, issue.93, p.90163, 1993.

R. C. Fletcher and B. Hallet, Unstable extension of the lithosphere: A mechanical model 655 for basin-and-range structure, J. Geophys. Res. Solid Earth, vol.88, pp.7457-7466, 1983.

H. Fossen, R. H. Gabrielsen, J. I. Faleide, and C. A. Hurich, Crustal stretching in the 658, 2014.

, Scandinavian Caledonides as revealed by deep seismic data, Geol

D. M. Fountain and M. H. Salisbury, Exposed cross-sections through the continental crust: 660 implications for crustal structure, petrology, and evolution, Earth Planet. Sci. Lett, vol.56, pp.90133-90136, 1981.

G. Frasca, F. Gueydan, J. Brun, and P. Monié, Deformation mechanisms in a 663 continental rift up to mantle exhumation, Field evidence from the western Betics, 2016.

, Mar. Pet. Geol, vol.76, pp.310-328

N. Froitzheim and G. P. Eberli, Extensional detachment faulting in the evolution of a 666 Tethys passive continental margin, Geol. Soc. Am. Bull, vol.102, pp.1297-1308, 1990.

N. Froitzheim, J. Pleuger, and T. J. Nagel, Extraction faults, J. Struct. Geol, vol.28, p.1395, 2006.

N. Froitzheim, S. M. Schmid, and P. Conti, Repeated change from crustal shortening to 671 orogen-parallel extension in the Austroalpine units of Graubünden, Eclogae Geol. Helv, vol.672, pp.559-612, 1994.

L. Gernigon, M. Brönner, D. Roberts, O. Olesen, A. Nasuti et al., Crustal 674 and basin evolution of the southwestern Barents Sea: From Caledonian orogeny to 675 continental breakup, Tectonics, vol.33, pp.347-373, 2014.

T. V. Gerya and D. A. Yuen, Characteristics-based marker-in-cell method with 677 conservative finite-differences schemes for modeling geological flows with strongly 678 variable transport properties, Phys. Earth Planet. Inter, vol.140, pp.293-318, 2003.

M. R. Handy, The structure, age and kinematics of the Pogallo Fault Zone, 1987.

N. Alps and . Italy, Eclogae Geol. Helv, vol.80, pp.595-632

M. R. Handy, The solid-state flow of polymineralic rocks, J. Geophys. Res, vol.95, 1990.

M. R. Handy, Flow laws for rocks containing two non-linear viscous phases: A 685 phenomenological approach, J. Struct. Geol, vol.16, issue.94, pp.90035-90038, 1994.

M. R. Handy, L. Franz, F. Heller, B. Janott, and R. Zurbriggen, Multistage accretion and 688 exhumation of the continental crust (Ivrea crustal section, 1999.

, Tectonics, vol.18, pp.1154-1177

W. Hansmann, O. Müntener, and J. Hermann, U-Pb zircon geochronology of a tholeiitic 691 intrusion and associated migmatites at a continental crust-mantle transition, Val 692 Malenco, Italy. Schweizerische Mineral. und Petrogr. Mitteilungen, vol.81, pp.239-255, 2001.

A. Henk, L. Franz, S. Teufel, and O. Oncken, Magmatic underplating, extension, and 694 crustal reeguilibration: insights from a cross-section through the Ivrea Zone and Strona-695 Ceneri Zone, Northern Italy, J. Geol, vol.105, pp.367-377, 1997.

J. Hermann and O. Müntener, Extension-related structures in the Malenco-Margna-697 system: implications for paleogeography and consequences for rifting and Alpine 698 tectonics, Schweizerische Mineral. und Petrogr. Mitteilungen, vol.76, pp.501-519, 1996.

C. W. Holyoke and J. Tullis, Mechanisms of weak phase interconnection and the effects of 700 phase strength contrast on fabric development, J. Struct. Geol, vol.28, 2006.

R. S. Huismans and C. Beaumont, Rifted continental margins: The case for depth-703 dependent extension, Earth Planet. Sci. Lett, vol.407, pp.148-162, 2014.

L. Jolivet, C. Gorini, J. Smit, and S. Leroy, Continental breakup and the dynamics of 706 rifting in back-arc basins: The Gulf of Lion margin, Tectonics, vol.34, pp.662-679, 2015.

G. D. Karner, N. W. Driscoll, and D. H. Barker, Syn-rift regional subsidence across the 709, 2003.

, West African continental margin: the role of lower plate ductile extension

S. London and . Publ, , vol.207, pp.105-129

T. Kenkmann and G. Dresen, Dislocation microstructure and phase distribution in a lower 712 crustal shear zone -an example from the, Int. J. Earth Sci, vol.91, p.458, 2002.

S. H. Kirby, Rheology of the lithosphere, Rev. Geophys, vol.21, 1983.

N. J. Kusznir and G. D. Karner, Continental lithospheric thinning and breakup in response 717 to upwelling divergent mantle flow: application to the Woodlark, Newfoundland and 718 Iberia margins, vol.282, pp.389-419, 2007.

A. Langone, . Padrón-navarta, A. José, W. Ji, A. Zanetti et al., , p.720

T. Giovanardi and M. Bonazzi, Ductile-brittle deformation effects on crystal-721 chemistry and U-Pb ages of magmatic and metasomatic zircons from a dyke of the 722, 2017.

, Lithos 284-285, vol.723, pp.493-511

A. Langone, A. Zanetti, N. R. Daczko, S. Piazolo, M. Tiepolo et al., , 2018.

U. Zircon, Pb dating of a lower crustal shear zone: a case study from the northern sector 726 of the Ivrea-Verbano Zone

H. C. Larsen, G. Mohn, M. Nirrengarten, Z. Sun, J. Stock et al.,

C. A. Zarikian, J. Boaga, S. A. Bowden, A. Briais, Y. Chen et al., , p.730

W. Ding, M. Dorais, E. C. Ferré, F. Ferreira, A. Furusawa et al., , p.731

T. W. Höfig, K. H. Hsiung, B. Huang, E. Huang, X. L. Huang et al., , p.732

B. G. Johnson, R. M. Kurzawski, C. Lei, B. Li, L. Li et al., , p.733

Z. Liu, A. J. Luna, C. Lupi, A. Mccarthy, L. Ningthoujam et al., , p.734

P. Persaud, N. Qiu, C. Robinson, S. Satolli, I. Sauermilch et al., , p.735

S. Straub, S. Su, X. Su, C. Tian, L. Van-der-zwan et al., , p.736

R. Yadav, L. Yi, P. S. Yu, C. Zhang, J. Zhang et al., , p.737

L. Zhong, Rapid transition from continental breakup to igneous oceanic crust in 738 the South China Sea, Nat. Geosci, vol.11, pp.782-789, 2018.

S. J. Mackwell, M. E. Zimmerman, and D. L. Kohlstedt, High-temperature deformation of 740 dry diabase with application to tectonics on Venus, J. Geophys. Res. Solid Earth, vol.103, pp.975-984, 1998.

G. Manatschal, L. Lavier, and P. Chenin, The role of inheritance in structuring 743 hyperextended rift systems: Some considerations based on observations and numerical 744 modeling, Gondwana Res, vol.27, pp.140-164, 2015.

G. Manatschal and P. Nievergelt, A continent-ocean transition recorded in the Err and 746 Platta nappes (Eastern Switzerland), Eclogae Geol. Helv, vol.90, pp.3-27, 1997.

E. Masini, G. Manatschal, G. Mohn, J. Ghienne, and F. Lafont, The tectono-748 sedimentary evolution of a supra-detachment rift basin at a deep-water magma-poor 749 rifted margin: the example of the Samedan Basin preserved in the Err nappe in SE 750, 2011.

. Switzerland, Basin Res, vol.23, pp.652-677

G. Mohn, G. Manatschal, M. Beltrando, E. Masini, and N. Kusznir, Necking of 752 continental crust in magma-poor rifted margins: Evidence from the fossil Alpine Tethys 753 margins, Tectonics, vol.31, pp.1-28, 2012.

G. Mohn, G. Manatschal, E. Masini, and O. Müntener, Rift-related inheritance in 755 orogens: a case study from the Austroalpine nappes in Central Alps (SE-Switzerland and 756 N-Italy), Int. J. Earth Sci, vol.100, pp.937-961, 2011.

G. Mohn, G. Manatschal, O. Müntener, M. Beltrando, and E. Masini, Unravelling the 758 interaction between tectonic and sedimentary processes during lithospheric thinning in 759 the Alpine Tethys margins, Int. J. Earth Sci, vol.99, pp.75-101, 2010.

A. Mulch, M. Cosca, and M. Handy, In-situ UV-laser 40Ar/39Ar geochronology of a 762 micaceous mylonite : an example of defect-enhanced argon loss, Contrib. to Mineral, 2002.

, Petrol, vol.142, pp.738-752

A. Mulch, M. Rosenau, W. Dörr, and M. Handy, The age and structure of dikes along 765 the tectonic contact of the Ivrea-Verbano and Strona-Ceneri Zones (southern Alps, p.766, 2002.

, Northern Italy, Switzerland). Schweizerische Mineral. und Petrogr. Mitteilungen, vol.82, pp.55-767

O. Müntener and J. Hermann, The role of lower crust and continental upper mantle during 769 formation of non-volcanic passive margins: evidence from the Alps, p.770, 2001.

. Spec, , vol.187, pp.267-288

O. Müntener, J. Hermann, and V. Trommsdorff, Cooling History and Exhumation of 772, 2000.

. Lower-crustal, Granulite and Upper Mantle (Malenco, Eastern Central Alps), J. Petrol, vol.773, issue.41, pp.175-200

O. Müntener, G. Manatschal, L. Desmurs, and T. Pettke, Plagioclase Peridotites in 775 Ocean-Continent Transitions: Refertilized Mantle Domains Generated by Melt 776 Stagnation in the Shallow Mantle Lithosphere, J. Petrol, vol.51, pp.255-294, 2010.

P. T. Osmundsen and J. Ebbing, Styles of extension offshore mid-Norway and 779 implications for mechanisms of crustal thinning at passive margins, Tectonics, vol.27, pp.1-25, 2008.

G. Péron-pinvidic and G. Manatschal, The final rifting evolution at deep magma-poor 782 passive margins from Iberia-Newfoundland: a new point of view, Int. J. Earth Sci, vol.98, pp.1581-1597, 2009.

B. Petri, G. Mohn, E. Skrzypek, T. Mateeva, F. Galster et al., U-Pb 785 geochronology of the Sondalo gabbroic complex (Central Alps) and its position within 786 the Permian post-Variscan extension, Int. J. Earth Sci, vol.106, 2017.

B. Petri, G. Mohn, P. ?típská, K. Schulmann, and G. Manatschal, Eastern Alps): implications for mid-crustal mafic magma 790 emplacement, Contrib. to Mineral. Petrol, vol.171, p.52, 2016.

B. Petri, E. Skrzypek, G. Mohn, T. Mateeva, P. Robion et al., , p.792

O. Müntener, Mechanical anisotropies and mechanisms of mafic magma ascent in 793 the middle continental crust: The Sondalo magmatic system (N Italy), GSA Bull, vol.130, pp.331-352, 2018.

A. A. Popov and S. V. Sobolev, SLIM3D: A tool for three-dimensional thermomechanical 796 modeling of lithospheric deformation with elasto-visco-plastic rheology, Phys. Earth 797 Planet. Inter, vol.171, pp.55-75, 2008.

J. E. Quick, S. Sinigoi, A. W. Snoke, T. J. Kalakay, A. Mayer et al., Geologic 799 map of the southern Ivrea-Verbano, Geological Survey, vol.800, 2003.

, Geologic Investigations Series Map I-2776

E. Rader, E. Emry, N. Schmerr, D. Frost, C. Cheng et al., 802 Characterization and Petrological Constraints of the Midlithospheric Discontinuity, 2015.

. Geochemistry, Geophys. Geosystems, vol.16, pp.3484-3504

T. Reston, Extension discrepancy at North Atlantic nonvolcanic rifted margins: 805 Depth-dependent stretching or unrecognized faulting?, Geology, vol.35, pp.367-370, 2007.

T. Reston, The formation of non-volcanic rifted margins by the progressive extension 807 of the lithosphere: the example of the West Iberian margin, 2007.

. Publ, , vol.282, pp.77-110

T. J. Reston, Evidence for shear zones in the lower crust offshore Britain, Tectonics, vol.7, pp.810-929, 1988.

T. J. Reston, C. M. Krawczyk, and D. Klaeschen, The S reflector west of Galicia (Spain): 812 Evidence from prestack depth migration for detachment faulting during continental 813 breakup, J. Geophys. Res. Solid Earth, vol.101, pp.8075-8091, 1996.

E. Ros, M. Pérez-gussinyé, M. Araújo, M. Thoaldo-romeiro, and M. Andrés-martínez, , p.815

J. P. Morgan, Lower Crustal Strength Controls on Melting and Serpentinization at, vol.816, 2017.

, Magma-Poor Margins: Potential Implications for the South Atlantic, Geochemistry, p.817

, Geophys. Geosystems, vol.18, pp.4538-4557

E. Rybacki and G. Dresen, Deformation mechanism maps for feldspar rocks, 2004.

, Tectonophysics, vol.382, pp.173-187

S. M. Schmalholz and T. Duretz, Impact of grain size evolution on necking in calcite 821 layers deforming by combined diffusion and dislocation creep, J. Struct. Geol, vol.103, pp.37-822, 2017.

S. M. Schmalholz and N. S. Mancktelow, Folding and necking across the scales: a review 824 of theoretical and experimental results and their applications, Solid Earth, vol.7, pp.1417-1465, 2016.

S. M. Schmid, A. Zingg, and M. Handy, The kinematics of movements along the Insubric 827 Line and the emplacement of the Ivrea Zone, Tectonophysics, vol.135, pp.47-66, 1987.

R. Schuster and K. Stüwe, Permian metamorphic event in the Alps, Geology, vol.36, pp.603-606, 2008.

W. T. Shea and A. K. Kronenberg, Strength and anisotropy of foliated rocks with varied 832 mica contents, J. Struct. Geol, vol.15, issue.93, pp.90158-90165, 1993.

S. Siegesmund, P. Layer, I. Dunkl, A. Vollbrecht, A. Steenken et al., Exhumation and deformation history of the lower crustal section of the Valstrona 836 di Omegna in the Ivrea Zone, southern Alps, vol.835, pp.45-68, 2008.

M. I. Spalla, D. Zanoni, A. M. Marotta, G. Rebay, M. Roda et al., 839 The transition from Variscan collision to continental break-up in the Alps: insights from 840 the comparison between natural data and numerical model predictions, 2014.

S. London and . Publ, , p.405

H. Thybo and I. M. Artemieva, Moho and magmatic underplating in continental 843 lithosphere, Tectonophysics, vol.609, pp.605-619, 2013.

J. Tugend, M. Gillard, G. Manatschal, M. Nirrengarten, C. Harkin et al., , p.846

J. Autin, N. Kusznir, and K. Mcdermott, Reappraisal of the magma-rich versus 847 magma-poor rifted margin archetypes, vol.476, 2018.

A. Tommasi and A. Vauchez, Continental rifting parallel to ancient collisional belts: an 850 effect of the mechanical anisotropy of the lithospheric mantle, Earth Planet. Sci. Lett, vol.851, pp.199-210, 2001.

V. Quadt, A. Grünenfelder, M. Büchi, and H. , U-Pb zircon ages from igneous rocks of 853 the Bernina nappe system, Schweizerische Mineral. und Petrogr. 854 Mitteilungen, vol.74, pp.373-382, 1994.

J. F. Von-raumer, F. Bussy, U. Schaltegger, B. Schulz, and G. M. Stampfli, Pre-Mesozoic 856 Alpine basements-Their place in the European Paleozoic framework, 2013.

. Bull, , vol.125, pp.89-108

R. B. Whitmarsh, S. M. Dean, T. A. Minshull, and M. Tompkins, Tectonic implications of 859 exposure of lower continental crust beneath the Iberia Abyssal Plain, Northeast Atlantic 860 Ocean: Geophysical evidence, Tectonics, vol.19, pp.919-942, 2000.

R. P. Wintsch, R. Christoffersen, and A. K. Kronenberg, Fluid-rock reaction weakening of 862 fault zones, J. Geophys. Res. Solid Earth, vol.100, pp.13021-13032, 1995.

R. Wolff, I. Dunkl, G. Kiesselbach, K. Wemmer, and S. Siegesmund, , 2012.

, Thermochronological constraints on the multiphase exhumation history of the Ivrea-865

, Tectonophysics, vol.579, pp.104-117

D. Zastrozhnov, L. Gernigon, I. Gogin, M. M. Abdelmalak, S. Planke et al., Cretaceous-Paleocene Evolution and Crustal Structure of the, p.869, 2018.

, Northern Vøring Margin (Offshore Mid-Norway): Results from Integrated Geological 870 and Geophysical Study

A. Zingg, M. R. Handy, J. C. Hunziker, and S. M. Schmid, Tectonometamorphic history of 872 the Ivrea Zone and its relationship to the crustal evolution of the Southern Alps, 1990.

, 875 deformation is "homogeneously, Tectonophysics, vol.182, pp.169-192

, (a) Tectonic map of the Southern and Central Alps compiled from the Swiss 891 and Italian geological maps and from Müntener and Hermann (2001). (b,c) Present-day 892 schematic cross sections across (b) the Eastern Alps, p.893

. Mohn, 2011) and (c) the Southern Alps (location also on Fig. 5; modified from Zingg et 894 al, vol.CMB, p.895, 1990.

. Mergozo-brissago-line, FSZ: Finero Shear Zones; IVZ; Ivrea-Verbano Zone

, Maggiore Fault; LVG: Lugano Val Grande Fault; LMMZ: Lunghin-Mortirolo Movement 897 Zone; PL: Pogallo Line

, Lago Maggiore Fault; LVG: Lugano Val Grande Fault; PL: Pogallo Line; VCSZ: Val Cola 931

, Location of Y-Y' section on Fig

, Field photographs and microphotograph from the Southern Alps

. Anzola-rosarolo, Shear Zone (ARSZ) showing dynamic recrystallization of plagioclase, p.935

P. Amphibole, c) The Pogallo line showing greenschist facies deformation