Falda della Maggia

Darstellung und Status

Farbe CMYK

N/A

Farbe RGB

R: 241 G: 239 B: 237

Rang

Decke

Gebrauch

Element ist in Gebrauch

Status

gültig

Nomenklatur

Deutsch

Maggia-Decke

Français

Nappe de la Maggia

Italiano

Falda della Maggia

English

Maggia Nappe

Herkunft des Namens

Valle Maggia (TI)

Historische Varianten

Maggia-Lappen (Niggli et al. 1936, Günthert 1954, Günthert 1958), lembo della Maggia (Hermann 1937), Maggia-Komplex (Kobe 1956), lobo della Maggia (Bianconi 1971), falda Maggia, unità di basamento della Maggia (Dal Piaz et al. 1992a), Falda della Maggia (Della Torre & Maggini 2015), falda della Maggia (Schenker, Bl. Osogna)

Nomenklatorische Bemerkungen

Maggia stem = Maggia s.s.

Beschreibung

Beschreibung

Paragneis und variszische Intrusivkörper.

Hierarchie und Abfolge

Obergrenze

Lebendun-Decke bzw. Bedretto-Zone

Untergrenze

Antigorio-Decke

Geografie

Geographische Verbreitung

Lepontin zwischen Val Bedretto und Lago Maggiore.

Typusregion

Valle Maggia

Paläogeografie und Tektonik

Paläogeografie

Distal NHS (S-Helv.)

Tektonische Einheit (bzw. Überbegriff)

• Maggia

Referenzen

Neubearbeitung

Gouffon Yves (Editor) (2024) : Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern

p.49: The Maggia and Sambuco nappes occupy the NNW–SSE oriented transverse synformal zone in the middle of the structural Lepontine Dome, but are not in cartographic continuity. These two units are made up of similar basement rocks intruded by Variscan granitoids (Late Carboniferous) but, in contrast to the Maggia Nappe, the Sambuco Nappe has a thin sedimentary cover, the facies of which have a Helvetic affinity (Steck et al. 2019). These units have undergone polyphase deformation (e. g., Maxelon & Mancktelow 2005) which makes the interpretation of their relationships with each other and with adjacent units difficult. Some authors see them as structurally continuous, at the top of the nappe stack, others as tectonically distinct units, at different structural levels (see discussion in Berger et al. 2005a, Steck et al. 2013, 2019). Some authors (e. g., Berger et al. 2005a, Schmid et al. 2004) consider these two nappes as Middle Penninic because they are located above units originating from a subduction zone (Cima Lunga Nappe and Mergoscia Zone), implying a Briançonnais origin. This upper position is contested by Maxelon & Mancktelow (2005) and Steck et al. (2019). Moreover, their sedimentary cover and the latest Carboniferous age of their magmatic rocks are more in concordance with a paleogeographic origin in the European margin that justifies placing the Maggia and Sambuco nappes in the Lepontic domain. In addition, by grouping the Simano and the Cima Lunga nappes (§ 5.8), Tagliaferri et al. (2023) proposed the existence of a lateral continuity between the Maggia Nappe and the Adula Nappe.