Structural and metamorphic evolution during tectonic mixing: is the Rocca Canavese Thrust Sheet (Italian Western Alps) a subduction-related mélange?

2018 ◽  
Vol 137 (2) ◽  
pp. 311-329 ◽  
Author(s):  
Manuel Roda ◽  
Francesca De Salvo ◽  
Michele Zucali ◽  
Maria Iole Spalla
Keyword(s):  
Western Alps ◽  
Metamorphic Evolution ◽  
Thrust Sheet

scholarly journals Metasediments Covering Ophiolites in the HP Internal Belt of the Western Alps: Review of Tectono-Stratigraphic Successions and Constraints for the Alpine Evolution

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 411
Author(s):  
Paola Tartarotti ◽  
Silvana Martin ◽  
Andrea Festa ◽  
Gianni Balestro
Keyword(s):  
High Pressure ◽  
Western Alps ◽  
Metamorphic Evolution ◽  
Alpine Orogeny ◽  
Sedimentary Evolution ◽  
Hp Metamorphism ◽  
Tethys Ocean ◽  
Depositional Setting ◽  
Oceanic Rocks ◽  
Outer Band

Ophiolites of the Alpine belt derive from the closure of the Mesozoic Tethys Ocean that was interposed between the palaeo-Europe and palaeo-Adria continental plates. The Alpine orogeny has intensely reworked the oceanic rocks into metaophiolites with various metamorphic imprints. In the Western Alps, metaophiolites and continental-derived units are distributed within two paired bands: An inner band where Alpine subduction-related high-pressure (HP) metamorphism is preserved, and an outer band where blueschist to greenschist facies recrystallisation due to the decompression path prevails. The metaophiolites of the inner band are hugely important not just because they provide records of the prograde tectonic and metamorphic evolution of the Western Alps, but also because they retain the signature of the intra-oceanic tectono-sedimentary evolution. Lithostratigraphic and petrographic criteria applied to metasediments associated with HP metaophiolites reveal the occurrence of distinct tectono-stratigraphic successions including quartzites with marbles, chaotic rock units, and layered calc schists. These successions, although sliced, deformed, and superposed in complex ways during the orogenic stage, preserve remnants of their primary depositional setting constraining the pre-orogenic evolution of the Jurassic Tethys Ocean.

scholarly journals Tectono-metamorphic evolution of an evaporitic décollement as recorded by mineral and fluid geochemistry: The “Nappe des Gypses” (Western Alps) case study

Lithos ◽  
2020 ◽  
Vol 358-359 ◽  
pp. 105419
Author(s):  
Guillaume Barré ◽  
Pierre Strzerzynski ◽  
Raymond Michels ◽  
Stéphane Guillot ◽  
Pierre Cartigny ◽  
...  
Keyword(s):  
Western Alps ◽  
Fluid Geochemistry ◽  
Metamorphic Evolution

scholarly journals Thermal structure and metamorphic evolution of the Piemont-Ligurian metasediments in the northern Western Alps

2013 ◽  
Vol 106 (1) ◽  
pp. 63-78 ◽  
Author(s):  
François Negro ◽  
Romain Bousquet ◽  
Flurin Vils ◽  
Clara-Marine Pellet ◽  
Jeanette Hänggi-Schaub
Keyword(s):  
Thermal Structure ◽  
Western Alps ◽  
Metamorphic Evolution

Late tectonic and metamorphic evolution of the Piedmont accretionary wedge (Queyras Schistes lustrés, western Alps): Evidences for tilting during Alpine collision

2009 ◽  
Vol 121 (3-4) ◽  
pp. 502-518 ◽  
Author(s):  
Stéphane Schwartz ◽  
Pierre Tricart ◽  
Jean-Marc Lardeaux ◽  
Stéphane Guillot ◽  
Olivier Vidal
Keyword(s):  
Western Alps ◽  
Accretionary Wedge ◽  
Metamorphic Evolution

Tectono-metamorphic evolution of the Briançonnais zone (Modane-Aussois and Southern Vanoise units, Lyon Turin transect, Western Alps)

2012 ◽  
Vol 56-57 ◽  
pp. 55-75 ◽  
Author(s):  
Pierre Strzerzynski ◽  
Stéphane Guillot ◽  
Philippe Hervé Leloup ◽  
Nicolas Arnaud ◽  
Olivier Vidal ◽  
...  
Keyword(s):  
Western Alps ◽  
Metamorphic Evolution

Deciphering orogeny: a metamorphic perspective. Examples from European Alpine and Variscan belts

2014 ◽  
Vol 185 (2) ◽  
pp. 93-114 ◽  
Author(s):  
Jean-Marc Lardeaux
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Western Alps ◽  
Metamorphic Rocks ◽  
Temporal Data ◽  
Metamorphic Evolution ◽  
Metamorphic History ◽  
Alpine Metamorphism ◽  
Collision Processes

AbstractIn this paper we review and discuss, in a synthetic historical way, the main results obtained on Alpine metamorphism in the western Alps. First, we describe the finite metamorphic architecture of the western Alps and discuss its relationships with subduction and collision processes. Second, we portray the progressive metamorphic evolution through time and space with the presentation of 5 metamorphic maps corresponding to critical orogenic periods, namely 85-65 Ma, 60-50 Ma, 48-40 Ma, 38-33 Ma and 30-20 Ma. We underline the lack of temporal data on high-pressure/low-temperature metamorphic rocks as well as the severe uncertainties on the sizes of rock units that have recorded the same metamorphic history (i.e. coherent P-T-t/deformation trajectories). We discuss the role of subduction-driven metamorphism in ocean-derived protoliths and the conflicting models that account for the diachrony of continental subductions in the western Alps.

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