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 im-prints. 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 met-aophiolites reveal the occurrence of distinct tectono‐stratigraphic successions including quartzites with marbles, chaotic rock units, and layered calc schists. These successions, although sliced, de-formed, 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.

Metasediments covering ophiolites in the hp internal belt of the western alps: Review of tectono‐stratigraphic successions and constraints for the alpine evolution / P. Tartarotti, S. Martin, A. Festa, G. Balestro. - In: MINERALS. - ISSN 2075-163X. - 11:4(2021 Apr), pp. 411.1-411.32. [10.3390/min11040411]

Metasediments covering ophiolites in the hp internal belt of the western alps: Review of tectono‐stratigraphic successions and constraints for the alpine evolution

P. Tartarotti
Primo
;
2021

Abstract

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 im-prints. 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 met-aophiolites reveal the occurrence of distinct tectono‐stratigraphic successions including quartzites with marbles, chaotic rock units, and layered calc schists. These successions, although sliced, de-formed, 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.
Calc schist; Metasediments; Ophiolite; Tethyan Ocean; Western Alps
Settore GEO/03 - Geologia Strutturale
Settore GEO/02 - Geologia Stratigrafica e Sedimentologica
14-apr-2021
https://www.mdpi.com/2075-163X/11/4/411
Article (author)
File in questo prodotto:
File Dimensione Formato  
Tartarotti et al-2021-Minerals.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 49.45 MB
Formato Adobe PDF
49.45 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/890618
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact