«unità del Moncucco»

Représentation et statut

Variantes historiques: Moncucco-Serie (Blumenthal 1952), Moncucco-Komplex = Moncucco-Gneise (Bearth 1956), Moncucco-Einheit (Bearth 1957, Laduron 1976, Merlin 1977), Moncucco-Gneissmasse (Wieland 1966), complexe du Camoghera-Moncucco (Trümpy 1970), sistema radicale Camughera-Moncucco = unità "radicali" di Camughera-Moncucco = unità continentale di Moncucco-Orselina (Dal Piaz et al. 1992a), Camughera-Moncucco unit (Keller et al. 2005), Moncucco unit (Steck 2008, Steck et al. 2013, Steck et al. 2015)

Description: paragneisses and subordinate orthogneisses of supposed pre-Mesozoic age

Unités hiérarchiquement subordonnées

Termes génériques

Type de protolithe

Définition: Bearth P. (1957) : Die Umbiegung von Vanzone (Val Anzasca). Eclogae geol. Helv., 50/1, 161-170

Révision: Steck Albrecht (2008) : Tectonics of the Simplon massif and Lepontine gneiss dome: deformation structures due to collision between the underthrusting European plate and the Adriatic indenter. Swiss J. Geosci. 101, 515-546

p.519: The Moncucco unit, within which we include the up to 400 m thick Moncucco peridotites, a sequence of metapelites, paragneisses, and amphibolites, an approximately 50 m wide fold hinge containing white siliceous marbles, outcropping at the Alpe Pradurino (Paleozoic or Mesozoic?; Bearth 1956b), and, in the core of the isoclinal Vanzone fold, the Moncucco porphyritic bi-mu-granite-gneiss, which is up to 700 m wide and has an age of 271 ± 4,8 Ma, (Rb-Sr, Biggogero et al. 1981).