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International Journal of Earth Sciences

, Volume 108, Issue 8, pp 2429–2442 | Cite as

The Maggia nappe: an extruding sheath fold basement nappe in the Lepontine gneiss dome of the Central Alps

  • Albrecht SteckEmail author
  • Jean-Luc Epard
  • Henri Masson
Review Article
  • 136 Downloads

Abstract

The Lepontine gneiss dome represents a unique region of the Central Alps where Oligocene–Miocene amphibolite facies grade rocks and fold nappes of the deepest tectonic level of the Alpine orogenic belt are exposed in a tectonic window. The Cenozoic structures of the Maggia nappe reveals a giant tens of kilometre-scale tubular fold structure that cross-cut through the surrounding lower Penninic nappes from its root situated in the southern steep-belt of the Alps near Bellinzona. The Mesozoic sedimentary cover of the Maggia nappe is typical for the Helvetic stratigraphic domain. The age of formation of the lower Penninic fold-nappes by ductile detachment of the upper European crust during its underthrusting below the higher Penninic and Austroalpine orogenic lid and Adriatic indenter was estimated between 40 and 30 Ma. Maximal pressures of 8–9 kbars and temperatures of 600–700 °C were attended during and after the nappe emplacement some 30–22 Ma ago. The Maggia and surrounding nappes are crosscut by the isograds of the Barrovian regional metamorphism.

Keywords

Swiss Alps Alpine tectonics Penninic nappes Sheath fold structure 

Notes

Acknowledgments

We thank Djordje Grujic and an anonymous reviewer for their constructive suggestions that helped improving this manuscript and Prof. Wolf-Christian Dullo for editorial handling and comments.

References

  1. Allaz J, Maeder X, Vannay J-C, Steck A (2005) Formation of alumosilicate-bearing quartz veins in the Simano nappe (Central Alps): structural, thermobarometric and oxygen isotope constraints. Schweiz Mineral Petrogr Mitt 85:191–214Google Scholar
  2. Argand E (1911) Les nappes de recouvrement des Alpes Pennines et leurs prologements structuraux. Beiträge zur Geologischen Karte der Schweiz [N.F.] 31:26Google Scholar
  3. Bächlin R, Bianconi F, Codoni A, Dal Vesco E, Knoblauch P, Kündig E, Reinhard M, Spänhauer F, Spicher A, Trommsdorff V, Wenk E (1974) Blatt 1313 Bellinzona. Geologischer Atlas der Schweiz 1:25’000, Federal Office of Topography, Ch-3084 WabernGoogle Scholar
  4. Bagnoud A, Wernli R, Sartori M (1998) Découverte de foraminifères planctoniques paléogènes dans la zone de Sion-Courmayeur à Sion (Valais, Suisse). Eclogae Geol Helv 91(3):421–429Google Scholar
  5. Becker H (1993) Garnet peridotite and eclogite Sm-Nd mineral ages from the Lepontine dome (swiss Alps): New evidence for Eocene High-pressure metamorphism in the central Alps. Geology 21:599–602CrossRefGoogle Scholar
  6. Berger A, Mercolli I (2006) Tectonic and petrographic map of the Central Lepontine Alps. Carte geologica speziale N. 127, 1:100’000, Federal Office of Topography, Ch-3084 WabernGoogle Scholar
  7. Berger A, Rosenberg C, Schmid SM (1996) Ascent, emplacement and exhumation of the Bergell pluton within the Southern Steep Belt of the central Alps. Schweiz Mineral Petrogr Mitt 76:357–382Google Scholar
  8. Berger A, Mercolli I, Engi M (2005) The central Lepontine Alps: Notes accompanying the tectonic and petrographic map sheet Sopra Ceneri (1:100’000). Schweiz Mineral Petrogr Mitt 85:109–146Google Scholar
  9. Bergomi MA, Tunesi A, Shi Y-R, Colombi A, Liu DY (2007) SHRIMPH U-Pb geochronical constraints of pre-Alpine magmatism in the Lower Penninic units of the Ossola Valley (Western Alps, Italy). Geochronol Res Abstracts 9:07780 (European geosciences Union) Google Scholar
  10. Bianconi F (1971) Geologia e petrografia delle regione del Campolungo. Materiali per la Carta Geologica della Svizzera N.S. 142Google Scholar
  11. Bianconi F, Strasky S (2015) Foglio 1252 Ambri-Piota. Atlante geologico della Svizzera 1:25 000, Note explicative 138, Federal Office of Topography, Ch-3084 WabernGoogle Scholar
  12. Boston KR, Rubatto D, Hermann J, Engi M, Amelin Y (2017) Geochronology of accessory allanite and monazite in the Barrovian metamorphic sequence of the Central Alps, Switzerland. Lithos 286–287:502–518CrossRefGoogle Scholar
  13. Bousquet R, Schmid SM, Zeitlinger G, Oberhänsli R, Rosenberg C, Molli G, Robert C, Wiederkehr M, Rossi PH (2012) Tectonic framework of the Alps. Map 1: 1 000 000. Commission for the Geological Map of the World. Subkommission for magmatic and metamorphic maps. IUGS and IUGG, Paris. http://www.cegm.org
  14. Brower FM, Burri T, Engi M, Berger A (2005) Eclogite relics in the Central Alps: PT-evolution, Lu-Hf ages and implications for formation of tectonic mélange zones. Schweiz Mineral Petrogr Mitt 85:147–174Google Scholar
  15. Burri T, Berger A, Engi M (2005) Tertiary migmatites in the Central Alps: regional distribution, field relations, conditions of formation, and tectonic implications. Schweiz Mineral Petrogr Mitt 85:215–232Google Scholar
  16. Bussien D, Bussy F, Magna T, Masson H (2011) Timing of Palaeozoic magmatism in the Maggia and Sambuco nappes and paleogeographic implications (Central Lepontine Alps). Swiss J Geosci 104:1–29CrossRefGoogle Scholar
  17. Cavargna-Sani M, Epard J-L, Bussy F, Ulianov A (2014a) Basement lithostratigraphy of the Adula nappe: implications of Palaeozoic evolution and Alpine kinematics. Int J Earth Sci 103:61–82CrossRefGoogle Scholar
  18. Cavargna-Sani M, Epard J-L, Steck A (2014b) Structure, geometry and kinematics of the northern Adula nappe (Central Alps). Swiss J Geosci 107:135–156CrossRefGoogle Scholar
  19. Chemenda AI, Mattauer M, Malavieille J, Bocun AN (1995) A mechanism for syn-collisional rock exhumation and associated mormal faulting: results from physical modelling. Earth Planet Sci Lett 132:225–232CrossRefGoogle Scholar
  20. Cobbold PR, Quinquins H (1980) Development of sheath folds in shear regimes. J Struct Geol 2:119–126CrossRefGoogle Scholar
  21. Della Torre F, Maggini L (2015) Foglio 1291 Bosco/Gurin. Atlante geol. Svizzera 1:25 000, Note explicative 145Google Scholar
  22. Ellenberger F (1953) La série du Barrhorn et les rétrocharriages penniques. C.R. Académie des Sciences (Paris) 236:218–220Google Scholar
  23. Engi M, Todd CS, Schmatz DR (1995) Tertiary metamorphic conditions in the eastern Lepontine Alps. Schweiz Mineral Petrogr Mitt 75:347–369Google Scholar
  24. Engi M, Berger A, Roselle GT (2001) Role of the tectonic accretion channel in collisional orogeny. Geology 29:1143–1146CrossRefGoogle Scholar
  25. Epard J-L, Escher A (1996) Transition from basement to cover: a geometric model. J Struct Geol 18:533–548CrossRefGoogle Scholar
  26. Escher A (1988) Structure de la nappe du Grand Saint-Bernard entre le val de Bagnes et les Mischabel. Rapports géologique du Service hydrologique et géologique national 7Google Scholar
  27. Escher A, Beaumont C (1997) Formation, burial and exhumation of basement nappes at crustal scale: a geometric model based on the western Swiss-Italian Alps. J Struct Geol 19:955–974CrossRefGoogle Scholar
  28. Froitzheim N (2001) Origin of the Monte Rosa nappe in the Pennine Alps—a new working hypothesis. Bull Geol Soc Am 113(5):604–614CrossRefGoogle Scholar
  29. Froitzheim N, Schmid SM, Frey M (1996) Mesozoic palaeography and the timing of eclogite facies metamorphism in the Alps: a working hypothesis. Eclogae Geol Helv 89:81–110Google Scholar
  30. Gebauer D (1996) A P-T-t path for an (ultra?-) high pressure ultramafic/mafic rock association and its felsic country-rocks based on SHRIMP-dating of magmatic and metamorphic zircon domains. Example: Alpe Arami (Central Swiss Alps). In: Basu A, Hart S (eds) Earth processes: reading the isotopic code, geophysical monograph 95. American Geophysical Union, Washington, pp 307–330Google Scholar
  31. Gerlach H (1869) Die Penninischen Alpen. Beiträge zur Geologischen Karte der Schweiz, 23/1Google Scholar
  32. Gregory JC, Rubatto D, Hermann J, Berger A, Engi M (2012) Allanite behaviour during incipient melting in the southern Central Alps. Geochim Cosmochim Acta 84:433–458CrossRefGoogle Scholar
  33. Grujic D, Mancktelow NS (1996) Structure of the northern Maggia and Lebendun nappes, Central Alps, Switzerland. Eclogae Geol Helv 89:461–504Google Scholar
  34. Heinrich CA (1986) Eclogite facies regional metamorphism of hydrous mafic rocks in the Central Alpine Adula nappe. J Petrol 27:123–154CrossRefGoogle Scholar
  35. Herwartz D, Nagel TJ, Munker C, Scherrer EE, Froitzheim N (2011) Tracing two orogenic cycles in one eclogite sample by Lu-Hf garnet chronometry. Nat Geosci 4:178–183CrossRefGoogle Scholar
  36. Hirsiger C, Bussy F, Epard J-L, Masson H, Steck A, Ulianov A (2015) The Lower Permian Alpigia magmatic complex and its country rock (Upper Maggia Valley, Central Alps): petrology, geochronology and structural position. In: 13th Swiss Geoscience Meeting, Basel 2015, Abstracte volume 54Google Scholar
  37. Huber ML (1981) Geologisch-strukturelle Untersuchungen im oberen Maggiagebiet (Tessin, Schweiz). Ph.D. dissertation, ETH ZürichGoogle Scholar
  38. Huber ML, Ramsay J, Simpson C (1980) Deformation in the Maggia and Antigorio nappes, Lepontine Alps. Eclogae Geol Helv 73:593–606Google Scholar
  39. Keller F, Wenk E, Bianconi F, Hasler P (1980) Blatt 1272 P. Campo Tencia, Geologischer Atlas der Schweiz, 1: 25’000, Atlasblatt 73, Federal Office of Topography, Ch-3084 WabernGoogle Scholar
  40. Krayenbuhl T, Steck A (2009) Structure and kinematics of the Jungfrau syncline, Faflertal (Vais, Alps), and its regional significance. Swiss J Geosci 102:441–456CrossRefGoogle Scholar
  41. Lacassin R, Mattauer M (1985) Kilometer scale sheath fold at Mattmark and implications for transport direction in the Alps. Nature 316(6022):739CrossRefGoogle Scholar
  42. Liszkay-Nagy M (1965) Geologie der Sedimentbedeckung des südwestlichen Gotthard-Massivs im Oberwallis. Ecloge Geol Helv 58:901–965Google Scholar
  43. Markley MJ, Teyssier C, Cosca MA, Caby MA, Hunziker JC, Sartori M (1998) Alpine deformation and 40Ar/39Ar geochronology of synkinematic white mica in the Siviez-Mischabel Nappe, western Pennine Alps, Switzerland. Tectonics 17:407–425CrossRefGoogle Scholar
  44. Masson H, Steck A (2015) The Maggia-Sambuco nappe: stratigraphy, correlations and tectonic consequences (Central Alps). In: 13th Swiss Geosciences Meeting, Basel 2015. Abstract, vol 1, pp 16–17Google Scholar
  45. Masson H, Herb R, Steck A (1980) Helvetic Alps of Western Switzerland. Excursion No I in Geology of Switzerland a guide-book by Trümpy, R. edited by Schweizerische Geologische Kommission, Wepf & Co, Basel, NewYorkGoogle Scholar
  46. Maxelon M, Mancktelow NS (2005) Three-dimensional geometry and tectonostratigraphy of the Pennine zone, Central Alps, Switzerland and Northern Italy. Earth Sci Rev 71:171–227CrossRefGoogle Scholar
  47. Merle O, Guillier B (1989) The building of the Swiss Central Alps: an experimental approach. Tectonophysics 165:41–56CrossRefGoogle Scholar
  48. Milnes AG (1974) Post-nappe folding in the western Lepontine Alps. Eclogae Geol Helv 67:333–348Google Scholar
  49. Niggli E, Niggli C (1965) Karten der Verbreitung einiger Mineralien der Alpidischen Metamorphose in den Schweizeralpen (Stilpnomelan, Alkali-Amphibol, Chloritoid, Staurolith, Disthen, Sillimanit). Eclogae Geol Helv 58:335–368Google Scholar
  50. Niggli P, Preiswerk H, Grütter O, Bossard L, Kündig E (1936) Geologische Beschreibung der Tessineralpen zwischen Maggia und Bleniotal. Beiträge zur Geologischen Karte der Schweiz N.F. 71. LieferungGoogle Scholar
  51. Pawlig S, Baumgartner L (2001) Geochemistry of talc-kyanitechloritoid shear zone within the Monte Rosa granite, Val d'Ayas, Italy. Schweiz Mineral Petrogr 81:329–326Google Scholar
  52. Pfeifer HR, Colombi A, Ganguin J, Hunziker JC, Oberhansli R, Santini L (1991) Relics of high-pressure metamorphism in different lithologies of the Central Alpa, an updating inventory. Schweiz Mineral Petrogr Mitt 71:441–451Google Scholar
  53. Pfeifer HR, Kobe H, Colombi A, Steck A, Pozzorini D, Gouffon Y (2019) Map sheet 1312: Atlante geologico et Note esplicative. Ufficio federale di topografia, WabernGoogle Scholar
  54. Pfiffner MA, Ellis S, Beaumont C (2000) Collision tectonics in the Swiss Alps: insight from geodynamic modelling. Tectonics 19:1065–1094CrossRefGoogle Scholar
  55. Preiswerk, H (1919) Die überkippte Tauchfalte am Campolungopass und ihre früheren Deutungen. “Heim-Festschrift”, Vierteljahresschrift Naturforschende Gesellschaft Zürich, LXIV, 1–15Google Scholar
  56. Preiswerk H, Bossard L, Grütter O, Niggli P, Kündig E, Ambühl E (1934) Geologische Karte der Tessineralpen zwischen Maggia- und Bleniotal. Geologische Spezialkarte Nr. 116. Bern: Schweizerische Geologische KommissionGoogle Scholar
  57. Ramsey J (1967) Folding and fracturing of rocks. McGraw-Hill, LondonGoogle Scholar
  58. Read HH (1955) Granite series in mobile belts. Spec Publ Geol Soc Am 62:409–430Google Scholar
  59. Romer R, Schärer U, Steck A (1996) Alpine and pre-Alpine magmatism in the root zone of the western Alps. Contrib Mineral Petrogr 123:138–158CrossRefGoogle Scholar
  60. Rubatto D, Herrmann J, Berger A, Engi M (2009) Protracted fluid-induced melting during Barrovian metamorphism in the Central Alps. Contrib Miner Petrol 158:703–722CrossRefGoogle Scholar
  61. Rütti R, Maxelon M, Mancktelow NS (2005) Structure and kinematics of the northern Simano nappe, Central Alps, Switzerland. Eclogae Geol Helv 98:63–81CrossRefGoogle Scholar
  62. Sandmann S, Nagel TJ, Herwartz D, Fonseca ROC, Kursawski RM (2014) Lu-Hf garnet systematics of a polymetamorphic basement unit: new evidence for coherent exhumation of the Adula Nappe (Central Alps) from eclogite facies conditions. Contrib Miner Petrol 168:1075CrossRefGoogle Scholar
  63. Schardt H (1903) Note sur le profil géologique et la tectonique du massif du Simlon compares au travaux antérieurs. Eclogae Geol Helv 8:173–200Google Scholar
  64. Schärer U, Cosca M, Hunziker J, Steck A (1996) Termination of major ductile strike-slip shear and differential cooling along the Insubric Line (Central Alps). Earth Planet Sci Lett 142:331–351CrossRefGoogle Scholar
  65. Schmid SM, Berger A, Davidson C, Giere R, Hermann J, Nievergelt P, Puschnig AR, Rosenberg C (1996) The Bergell pluton (southern Switzerland, northern Italy): overview accompanying a geological-tectonic map of the intrusion and surrounding country rocks. Schweiz Mineral Petrogr Mitt 76:329–355Google Scholar
  66. Schmid SM, Fügenschuh B, Kissling E, Schuster R (2004) Tectonic map and overall architecture of the Alpine orogeny. Eclogae Geol Helv 97:93–117CrossRefGoogle Scholar
  67. Schmid SM, Kissling E, Diehl T, van Hinsbergen DJJ, Molli G (2017) Ivrea mantle wedge, arc of Western Alps, and kinematic evolution of the Alps-Apennines orogenic system. Swiss J Geosci 110:581–612CrossRefGoogle Scholar
  68. Schmidt MW (1989) Petrography and structural evolution of ophiolitic remnants in the Bellinzona Zone, Southern Steep Belt, Central Alps (CH/I). Schweiz Mineral Petrogr Mitt 69:393–405Google Scholar
  69. Schmidt C, Preiswerk H (1905) Geologische Karte der Simplongruppe. Beiträge zur Geologischen Karte der Schweiz. 26, Spezialkarte No 48Google Scholar
  70. Simpson C (1982) The structure of the northern lobe of the Maggia nappe, Ticino, Switzerland. Eclogae Geol Helv 75:495–516Google Scholar
  71. Skora S, Mahlen NJ, Johnson CM, Baumgartner LP, Lapen TJ, Beard BL, Szilvagyi ET (2015) Evidence for protracted prograde metamorphism followed by rapid exhumatio oft he Zermatt-Saas Fee ophiolite. J Metamorph Geol 33:711–734CrossRefGoogle Scholar
  72. Spicher A, Wenk E (1981) Blatt 1313 Bellinzona. Geologischer Atlas der Schweiz 1:25’000, Erläuterungen, Federal Office of Topography, Ch-3084 WabernGoogle Scholar
  73. Steck A (1984) Structures de déformation tertiaries dans les Alpes centrales (transversal Aar-Simplon-Ossola). Eclogae Geol Helv 77:55–100Google Scholar
  74. Steck A (1987) Le massif du Simplon—Réflexions sur la cinématique des nappes de gneiss. Schweiz Mineral Petrogr Mitt 67:27–45Google Scholar
  75. Steck A (1990) Une cartes des zones de cisaillement ductile des Alpes centrales. Eclogae Geol Helv 83:603–627Google Scholar
  76. Steck A (1998) The Maggia cross-fold: an enigmatic structure of the Lower Penninic nappes of the Lepontine Alps. Eclogae Geol Helv 91:333–343Google Scholar
  77. Steck A (2008) Tectonics of the Simplon massif and the Lepontine gneiss dome: deformation structures due to collision between the underthrusting European plate and the Adriatic indenter. Swiss J Geosci 1001:515–546CrossRefGoogle Scholar
  78. Steck A (2011) Blatt 1269 Aletschgletscher und Erläuterungen. Geologischer Atlas Schweiz 1:25’000, Karte 131, Federal Office of Topography, Ch-3084 WabernGoogle Scholar
  79. Steck A, Hunziker J (1994) The Tertiary structural and thermal evolution of the Central Alps—compressional and extensional structures in an orogenic belt. Tectonophysics 238:229–254CrossRefGoogle Scholar
  80. Steck A, Epard JL, Escher A, Gouffon Y, Masson H (2001) Carte géologique et Notice explicative de la carte géologique de la Suisse occidentale 1:100 000. Carte géologique special N°123, Office fédérale des Eaux et de la Géologie, (Berne)Google Scholar
  81. Steck A, Della Torre F, Keller F, Pfeifer HR, Hunziker J, Masson H (2013) Tectonics of the Lepontine Alps: ductile thrusting and folding in the deepest tectonic levels of the Central Alps. Swiss J Geosci 106:427–450CrossRefGoogle Scholar
  82. Steck A, Masson H, Robyr M (2015) Tectonics of the Monte Rosa and surrounding nappes (Switzerland and Italy): Tertiary phases of subduction, thrusting and folding in the Pennine Alps. Swiss J Geosci 108:3–34CrossRefGoogle Scholar
  83. Tektonische Karte der Schweiz, 1:500’000 (2005) Federal Office for Water and Geology. BernGoogle Scholar
  84. Todd CS, Engi M (1997) Metamorphic field gradients in the Central Alps. J Metamorph Geol 15:513–530CrossRefGoogle Scholar
  85. Trommsdorff V (1966) Progressive Metamorphose kieseliger Karbonatgesteine in den Zentraalpen zwischen Bernina und Simplon. Schweiz Mineral Petrogr Mitt 46:431–460Google Scholar
  86. Trommsdorff V (1990) Metamorphism and tectonics in the central Alps: the Alpine evolution lithospheric mélange of the Cimalunga and Adula. Memorie della Socita Geologica Italiana 45:39–49Google Scholar
  87. Voll G (1976) Recrystallisation of quartz, biotite and feldspars from Erstfeld to the Leventina nappe, Swiss Alps and its geological significance. Schweiz Mineral Petrogr Mitt 56:641–647Google Scholar
  88. Wegmann E (1953) Über gleichzeitige Bewegungsbilder verschiedener Stockwerke. Geol Rundsch 41:21–33CrossRefGoogle Scholar
  89. Wenk E (1955) Eine Strukturkarte der Tessineralpen. Schweiz Mineral Petrogr Mitt 35:311–319Google Scholar
  90. Wenk E, Keller F (1969) Isograden in Amphibolitseries der Zentraalpen. Schweiz Mineral Petrogr Mitt 49:157–191Google Scholar
  91. Zingg A, Hunziker JC (1990) The age of movements along the Insubric line west of Locarno (Northern Italy and southern Switzerland). 83/3 Eclogae Geol Helv 836:629–644Google Scholar
  92. Zingg A, Handy MR, Hunziker JC, Schmid SM (1990) Tectonometamorphic history of the Ivrea zone and its relationship to the crustal evolution of the Southern Alps. Tectonophysics 182:169–192CrossRefGoogle Scholar

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© Geologische Vereinigung e.V. (GV) 2019

Authors and Affiliations

  1. 1.Institut des Sciences de la Terre, Université de Lausanne, bâtiment GeopolisLausanneSwitzerland

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