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Geology of the Pontinvrea area (Ligurian Alps, Italy): structural setting of the contact between Montenotte and Voltri units

Author

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  • Laura Federico
  • Laura Crispini
  • Cristina Malatesta
  • Silvia Torchio
  • Giovanni Capponi

Abstract

This geological map at the 1:10,000 scale shows the structural setting of two poly-deformed metaophiolite units, with different metamorphic peak conditions, i.e. the blueschist facies Montenotte Unit and the eclogite facies Voltri Unit, in a selected area of 8.2 km-super-2 within the Ligurian Alps (northern Italy). This study focuses on the tectonic contact between the two tectono-metamorphic units and on their relationships with the Oligocene sediments of the Tertiary Piedmont Basin. The map is a composite report of our field and laboratory study of structures and metamorphism, that explains our interpretation of the tectonic history of the study area. It shows that the two units were coupled during their exhumation path, along a blueschist facies mylonitic contact. This contact has been later involved in thrust faults that caused the superposition of the metamorphic basement on top of the Oligocene sediments.

Suggested Citation

  • Laura Federico & Laura Crispini & Cristina Malatesta & Silvia Torchio & Giovanni Capponi, 2015. "Geology of the Pontinvrea area (Ligurian Alps, Italy): structural setting of the contact between Montenotte and Voltri units," Journal of Maps, Taylor & Francis Journals, vol. 11(1), pages 101-113, January.
    • Handle: RePEc:taf:tjomxx:v:11:y:2015:i:1:p:101-113
    DOI: 10.1080/17445647.2014.945749
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