DOCSLIB.ORG

From Subduction to Collision S129

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
From Subduction to Collision S129 1661-8726/08/01S127-29 Swiss J. Geosci. 101 (2008) Supplement 1, S127–S155 DOI 10.1007/s00015-008-1289-6 Birkhäuser Verlag, Basel, 2008 From subduction to collision: thermal overprint of HP/LT meta-sediments in the north-eastern Lepontine Dome (Swiss Alps) and consequences regarding the tectono-metamorphic evolution of the Alpine orogenic wedge MICHAEL WIEDERKEHR1, 2, *, ROMAIN BOUSQUET 2, STEFAN M. SCHMID1 & ALFONS BERGER3 Key words: Lepontine dome, meta-sediments, Fe-Mg carpholite, Barrovian metamorphism, high-pressure metamorphism, Alpine tectonics ABSTRACT The Cenozoic-age metamorphic structure of the Alps consists of a through- phase) HP/LT metamorphism under blueschist facies conditions (350–400 °C going pressure-dominated belt (blueschists and eclogites) that strikes parallel and 1.2–1.4 GPa) was immediately followed by “cold” isothermal (or cool- to the orogen and was later truncated by two thermal domes characterised ing) decompression during D2 nappe-stacking (Ferrera phase). (2) Collision- by Barrow-type metamorphism (Lepontine dome and Tauern window). This related Barrovian overprint (500–570 °C and 0.5–0.8 GPa) postdates the D3 study documents for the first time that relics of Fe-Mg carpholite occur also nappe-refolding event (Domleschg phase) and represents a late heating pulse, within meta-sedimentary units that are part of the north-eastern Lepontine separated by D2 and D3 from the D1 high-pressure event. It occurred before structural and metamorphic dome, where so far exclusively Barrovian as- and/or during the initial stages of D4 (Chièra phase) representing a second semblages were found. They occur in meta-sediments of both Valais Ocean- nappe-refolding event. derived Lower Penninic Bündnerschiefer and structurally lower Europe-de- In discussing possible heat sources for the late Barrow-type heating pulse rived Sub-Penninic cover nappes and slices. These high-pressure units were it is argued that heat release from radioactive decay of accreted material may subsequently overprinted by a thermal event, as is documented by the growth play an important role in contributing much to heat production. Based on the of new minerals typical for Barrovian metamorphism. field evidence, we conclude that heat transfer was essentially conductive dur- We present evidence for a two-stage metamorphic evolution in the north- ing these latest stages of the thermal evolution. ern part of the Lepontine dome: (1) Early subduction-related syn-D1 (Safien 1. Introduction and the Tauern window in the Eastern Alps (Oberhänsli et al. 2004). The zoning of Alpine metamorphism is rather complex, evolv- Our area of investigation is located at the NE border of ing over a very long period of time before, during and after the Lepontine thermal dome. There, along strike of the tectonic the collision of Europe with Adria, i.e. from Late Cretaceous units, a remarkable metamorphic field gradient that ranges | downloaded: 7.10.2021 to Late Cenozoic times. Mapping of metamorphic facies in the from pressure-dominated blueschist facies in the NE to tem- Alps started with early pioneering studies based on the spatial perature-dominated Barrovian metamorphism in the SW is ob- distribution of index minerals and mineral assemblages (Wenk served within an amazingly short distance (< 10 km, Fig. 1 & 2). 1962; Niggli & Niggli 1965; Trommsdorff 1966; Frey 1969; Fox This allows for a clear correlation between the two metamor- 1975; Frey et al. 1980). Metamorphic maps at the scale of the phic events and structures that resulted from a polyphase de- Alpine orogen, showing the spatial arrangement of the differ- formation history. Hence, the area is well suited for studying ent metamorphic facies types, were repeatedly synthesised and spatial and temporal relationships between these two types improved (Ernst 1971; Niggli & Zwart 1973; Frey et al. 1999; of metamorphism, including their relative timing in respect to Oberhänsli et al. 2004). The Cenozoic-age metamorphic pat- discrete deformation phases linked to particular geodynamical tern is characterised by a pressure-dominated belt (blueschists stages. and eclogites) that strikes orogen-parallel but is interrupted by The availability of meta-sediments all along strike facilitates two thermal domes, the Lepontine dome in the Central Alps the reconstruction of the metamorphic and structural evolution 1 Geologisch-Paläontologisches Institut, Universität Basel, Bernoullistrasse 32, CH-4056 Basel, Switzerland. E-mail: [email protected] 2 Institut für Geowissenschaften, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D-14476 Potsdam/Golm, Germany. 3 https://doi.org/10.7892/boris.38564 Institut für Geologie, Universität Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland. *Corresponding author: Michael Wiederkehr. E-mail: [email protected] source: From subduction to collision S127 S 128 730 735 740 745 750 M. Wiederkehr etal. Wiederkehr M. Luzern 5 km ow 185 nd n a p p e s wi e in d a g Penninic n E Basal Thrust Ilanz A a r S i l v r e t t a Valzeina- 180 H e l v e t i c synform GotthardSteep Belt Adula Northern Simano Tambo Suretta Platta o n t i n e p 175 e Maggia L Southern Steep Belt Bergell Adamello Val Lumnezia Safiental Insubric line Luzern Mte Lunschania- Safien Rosa Maggiore anitform N 25 km 170 Ivrea Lago Giudicarie line Vrin P. Beverin A Valsertal P. Tomül 165 G o t t h a r d 165 P.Aul P. Medel Vals P.Terri 160 160 Val Luzzone P. Scopi Lukmanier Splügen A d u l a 155 155 Leventina - Olivone European margin / Sub-Penninic units Valaisan Briançonnais Helvetic domain Piz Terri - Basement and Gipfelzone Unit Grava Unit cover nappes Chièra- Lucomagno Piz Terri - synform Ilanzer Verrucano Schuppenzone Tomül Unit Quaternary 150 P.Molare Triassic, Lower/upper Ophiolites Flims landslide undifferentiated Valser slices Basement Aul Unit Structures Simano Scopi Unit nappes D3 syn-/ antiform Peidener D4 syn-/ antiform Valle di Blenio A’ Schuppenzone 700 705 710 715 720 725 Fig. 1. Tectonic sketch map of the study area showing the main geographic localities mentioned in the text as well as traces of axial planes of major D3 and D4 folds, and the main occurrences of index minerals and mineral assemblages found in the meta-sedimentary units (light-grey: Sub-Penninic/European units, dark-grey: Lower Penninic/Valaisan units; symbols are explained in Figure 2). The tectonic map of the Central Alps in the upper left is after Schmid et al. (2004), the frame shows the location of the study area. Letters A–A' mark the trace of the composite cross section shown in Figure 3. The dashed line delineates the cut-out shown in greater detail in Figure 2. in the working area. These meta-sediments contain widespread that predominantly consist of pre-Mesozoic igneous and meta- occurrences of Fe-Mg carpholite within an orogen-parallel HP/ sedimentary rocks, and cover nappes forming an orogen-paral- LT-metamorphic belt in eastern Switzerland (Grisons), char- lel belt of Mesozoic meta-sediments. The cover nappes are not acterised by blueschist facies conditions (Goffé & Oberhänsli interrupted by oblique tectonic contacts (thrusts or faults) and 1992; Oberhänsli 1994; Oberhänsli et al. 1995; Bousquet et al. they overlie the pre-Mesozoic basement units or nappes (Gott- 2002). Approaching the Lepontine dome, the same meta-sedi- hard “Massif”, Leventina-Lucomagno and Simano nappes). ments become increasingly affected by a temperature-domi- These Sub-Penninic nappes are structurally overlain by Lower nated, Barrovian metamorphic event, as is documented by am- Penninic cover nappes that originated from the Valais Ocean, phibolite facies mineral assemblages characterised by garnet, largely consisting of Mesozoic meta-sediments referred to as biotite, staurolite and kyanite (Chadwick 1968; Frey 1969; Fox Bündnerschiefer. The front of the Adula nappe complex only 1975; Engi et al. 1995; Frey & Ferreiro Mählmann 1999). No evi- reaches the southern rim of the working area. The occurrences dence is available, so far, that this part of the Lepontine dome, of oceanic remnants that are imbricated with typical continental characterised by this Barrow-type MP/MT metamorphism, crustal rocks in the overlying Misox Zone (e.g. Partzsch 1998), could have been previously also affected by HP/LT metamor- and according to some authors also within the Adula-Cima phism. Lunga nappe complex itself (e.g. Trommsdorff 1990, and ref- This tectono-metamorphic study primarily aims to docu- erences therein), indicate that the Adula nappe complex con- ment this transition from HP/LT blueschist facies metamor- tains slivers from the continent-ocean transition between the phism in the east to amphibolite-grade Barrow-type metamor- European margin and the Valais Ocean (lithospheric mélange; phism within the Lepontine dome further west. This will allow Trommsdorff 1990). The Penninic Basal Thrust represents an deducing whether these two contrasting types of metamorphism early-stage first-order thrust along which the Valaisan Bünd- evolved at the same time but differently in the different parts nerschiefer were originally thrust onto the Europe-derived of the study area, or alternatively, whether they evolved during Sub-Penninic units. However, this thrust was subsequently iso- consecutive stages of the evolution of the Alpine orogen. In the clinally refolded and hence penetratively overprinted by later second case the pressure-dominated metamorphism represents structures. The tectonic units, subdivided following the schemes an early stage related to subduction, followed by a tempera- proposed by Schmid et al. (2004) and Berger et al. (2005), are ture-dominated event, as proposed by Bousquet et al. (2008). mapped in Figures 1 and 2, as well as in cross section view The latter, i.e. a two-stage metamorphic evolution, was also (Fig. 3). In the following they are further described. proposed for more southerly located parts of the Lepontine dome. However, the question whether the Barrow-type over- 2.1.
Load more

Recommended publications
  • Graubünden for Mountain Enthusiasts
    Graubünden for mountain enthusiasts The Alpine Summer Switzerland’s No. 1 holiday destination. Welcome, Allegra, Benvenuti to Graubünden © Andrea Badrutt “Lake Flix”, above Savognin 2 Welcome, Allegra, Benvenuti to Graubünden 1000 peaks, 150 valleys and 615 lakes. Graubünden is a place where anyone can enjoy a summer holiday in pure and undisturbed harmony – “padschiifik” is the Romansh word we Bündner locals use – it means “peaceful”. Hiking access is made easy with a free cable car. Long distance bikers can take advantage of luggage transport facilities. Language lovers can enjoy the beautiful Romansh heard in the announcements on the Rhaetian Railway. With a total of 7,106 square kilometres, Graubünden is the biggest alpine playground in the world. Welcome, Allegra, Benvenuti to Graubünden. CCNR· 261110 3 With hiking and walking for all grades Hikers near the SAC lodge Tuoi © Andrea Badrutt 4 With hiking and walking for all grades www.graubunden.com/hiking 5 Heidi and Peter in Maienfeld, © Gaudenz Danuser Bündner Herrschaft 6 Heidi’s home www.graubunden.com 7 Bikers nears Brigels 8 Exhilarating mountain bike trails www.graubunden.com/biking 9 Host to the whole world © peterdonatsch.ch Cattle in the Prättigau. 10 Host to the whole world More about tradition in Graubünden www.graubunden.com/tradition 11 Rhaetian Railway on the Bernina Pass © Andrea Badrutt 12 Nature showcase www.graubunden.com/train-travel 13 Recommended for all ages © Engadin Scuol Tourismus www.graubunden.com/family 14 Scuol – a typical village of the Engadin 15 Graubünden Tourism Alexanderstrasse 24 CH-7001 Chur Tel. +41 (0)81 254 24 24 [email protected] www.graubunden.com Gross Furgga Discover Graubünden by train and bus.
    [Show full text]
  • A Hydrographic Approach to the Alps
    • • 330 A HYDROGRAPHIC APPROACH TO THE ALPS A HYDROGRAPHIC APPROACH TO THE ALPS • • • PART III BY E. CODDINGTON SUB-SYSTEMS OF (ADRIATIC .W. NORTH SEA] BASIC SYSTEM ' • HIS is the only Basic System whose watershed does not penetrate beyond the Alps, so it is immaterial whether it be traced·from W. to E. as [Adriatic .w. North Sea], or from E. toW. as [North Sea . w. Adriatic]. The Basic Watershed, which also answers to the title [Po ~ w. Rhine], is short arid for purposes of practical convenience scarcely requires subdivision, but the distinction between the Aar basin (actually Reuss, and Limmat) and that of the Rhine itself, is of too great significance to be overlooked, to say nothing of the magnitude and importance of the Major Branch System involved. This gives two Basic Sections of very unequal dimensions, but the ., Alps being of natural origin cannot be expected to fall into more or less equal com­ partments. Two rather less unbalanced sections could be obtained by differentiating Ticino.- and Adda-drainage on the Po-side, but this would exhibit both hydrographic and Alpine inferiority. (1) BASIC SECTION SYSTEM (Po .W. AAR]. This System happens to be synonymous with (Po .w. Reuss] and with [Ticino .w. Reuss]. · The Watershed From .Wyttenwasserstock (E) the Basic Watershed runs generally E.N.E. to the Hiihnerstock, Passo Cavanna, Pizzo Luceridro, St. Gotthard Pass, and Pizzo Centrale; thence S.E. to the Giubing and Unteralp Pass, and finally E.N.E., to end in the otherwise not very notable Piz Alv .1 Offshoot in the Po ( Ticino) basin A spur runs W.S.W.
    [Show full text]
  • Grossaftige Greina
    :1 :' .r GNTI: lJr- und Kulwrlondxlruftauf einer mveititgigenBergwon&rung vom fugrcz ins Blenioul. Grossaftige Greina o @ o z I o F d z z : Uz d o öd 6 Die Route (gelb) von Vrin llber die Greina naeh Campo Blenio lm Aufstieg zur Alp Diesrut: der lrrgnezer Weiler PuzzaGch Orientierung -. er Greina bleibt die kunft zerstört. Die Wasser- Pl.z'Terrjist. Vor uns baut sich | lSintflut erspart,der ge- rechtszinsenwären der Ge- der Piz Vial mit seiner Glet- Blatt257Safiental, Blatt 256 - plante Stausee wird meinde, die zu den ärmsten scherzungeauf, wenig später Disentis,Blatt 266 Leventina, nicht gebaut. Die Passwande-Graubündenszählt. willkom- überschauenwir den Plaun la ie l:50 000der Landestopo- rung durcheine gesamtschwei-mengewesen. Greina, die Greinaebene:Das graphie. zerisch einmalige Gebirgsge- Ist Vrin auch Wendepunkt Bild, das an das norwegische gend wird für den Naturfreund für dasPostauto, so führt doch Lappland oder an Island erin- nicht zum Abschiedsbesuchin ein Fahrsträsschenweiter, und nert, gibt es in der Schweiznur Alt uill Rikkreise Wehmut und Zorn. Überra- auf ihm müssenwir eine runde einmal. Der Somvixer Rhein Hin per Bahnund Postauto schendist nicht allein die Ur-, Stunde taleinwärts marschie- schlängelt sich in zahlreichen bisllanz und Vrin. Campo sondernauch die Kulturland- ren. Cons,Ligiazun, Sogn Giu- undimmer wieder wechselnden Bleniohat Busverbindung mit schaftan der Greina.Im roma- sep und Puzzatschwirken wie Läufen durch Geröllfelder und Olivone(Lukmanier) und nischsprachigenLugnez trifft ausgestorben,die Bauern sind Schafweiden.Wie wir untenam Biasca. der Wandererauf Häuserwie am Emden. Hinter dem Ra- im Wallisund auf einenfreiste- mosabachendlich ein Natur- hendenGlockenturm (Campa- weg,in denWiesen nach Vanil- ffiilte wandenip Marcchzeiüen nile) wie im Tessin.Drüben im le duftende Männertreu und Vrin-Terrihütterund 5 Std.: Bleniotal sind Einflüsse aus hochstengeligeEnziane.
    [Show full text]
  • Structure, Geometry and Kinematics of the Northern Adula Nappe (Central Alps)
    Swiss J Geosci (2014) 107:135–156 DOI 10.1007/s00015-014-0175-7 Structure, geometry and kinematics of the northern Adula nappe (Central Alps) Mattia Cavargna-Sani • Jean-Luc Epard • Albrecht Steck Received: 13 May 2013 / Accepted: 28 October 2014 / Published online: 21 November 2014 Ó Swiss Geological Society 2014 Abstract The eclogitic Adula nappe of the Central Alps zone involving the entire nappe and responsible for the (cantons Graubu¨nden and Ticino, Switzerland) displays an emplacement of the Lower Penninic sediments and the exceptionally complex internal structure with the particu- Middle Penninic nappes in the eastern part of the Lepontine larity of enclosing numerous slices of Mesozoic cover Dome. rocks (Internal Mesozoic) within the Palaeozoic gneiss basement. This study is principally based on detailed lith- Keywords Alpine orogeny Á Fold structures Á ological and structural mapping of selected areas of the Nappe emplacement Á High-pressure metamorphism Á northern Adula nappe. Specific focus was placed on the Switzerland Á Pennine zone Mesozoic slivers embedded in pre-Mesozoic basement (Internal Mesozoic). The most pervasive structures are related to the Zapport deformation phase that is responsible 1 Introduction for the development of a fold-nappe and ubiquitous north- directed shear. Locally, the structures in the upper and Eclogitic rocks in mountain belts are commonly associated frontal part of the nappe can be assigned to the older with a suture zone tracing old subduction zones (Ernst ductile Ursprung phase. These earlier structures are only 1971; Dal Piaz et al. 1972; Ernst 1973). Nappes containing compatible with top-to-S shear movement.
    [Show full text]
  • Ausgabe Winter 2019/2020
    PIZ TERRI AUSGABE WINTER 2019/2020 SANIERUNG STRASSE MAIGHELSHÜTTE ERÖFFNUNG PUNT LA GREINA Seite 9 Seite 28 Tourenprogramm Winter – Frühling 2019/2020 S.10 – 13 KRAFT SCHÖPFEN AUS DER ENERGIE DER NATUR Repower wünscht allen Gebirgsfreunden sonnige und unver- gessliche Tage in unserer Bergwelt sowie schöne und erholsame Stunden in den SAC-Hütten. www.repower.com TABLA DA CUNTEGN INHALT Titelthemen Die nächste Grillsaison wird kommen ... Sanierung Strasse Maighelshütte 7 Eröffnung Punt la Greina 28 … bereite dich vor Inhalte Sanierung und Ausbau der Maighelshütte 9 www.anplaq.ch Tourenprogramm Winter bis Frühling 10–13 News aus der Sektion Mutationen 14 Im Gedenken 15 Jahresbericht des Präsidenten 16 Hotel Péz Regina Jahresbericht des Tourenchefs 17 Edith und Bruno Gygax-Casanova Jahresbericht JO/KIBE 18 Jahresbericht Rettung 18 Bilanz 20 Erfolgsrechnung 22 Ruhig gelegenes Haus für einen erhol- Budget 24 samen Urlaub. Lumbrein ist ein idealer Aus- Einladung zur Generalversammlung 27 gangspunkt für herrliche Wanderungen Terrianer und Terrianerinnen unterwegs 30 in die Berge, zum Beispiel eine Greinawande- rung oder Biketouren durch Berg und Tal im Sommer und Herbst. Hotel Péz Regina • 7148 Lumbrein 081 931 11 72 • www.pezregina.ch • [email protected] Impressum Magazin « Piz Terri » : Winterausgabe 2019/2020, Sommerausgabe erscheint im Mai Bild Titelseite : Sektionstour Piz Terri 3149, Bild: Arno Arpagaus Redaktionsschluss : Ende März 2020 Herausgeber : SAC-Sektion Piz Terri c / o Arno Arpagaus-Willi Panätsch 31, 7203 Trimmis Redaktion : Mandy Klebig Hof 20, 7000 Chur ICHEL [email protected] SPORT DA MUNTOGNA Tel. +41 79 628 62 51 Via Principala www.bergsportsurselva.ch Inserate : [email protected] 7166 Trun Mitgliederverwaltung : Marlis Jörger-Frei T 081 936 36 56 Via Schlifras 38, 7130 Ilanz N 079 610 56 53 [email protected] [email protected] Tel.
    [Show full text]
  • Alta Quota Club Alpin Svizzer
    HF-3_italienisch_DEF 10.8.2007 11:26 Uhr Seite 1 CSS Assicurazione e Club Alpino Svizzero CAS presentano: Club Alpino Svizzero CAS Club Alpin Suisse Schweizer Alpen-Club Alta quota Club Alpin Svizzer 50 capanne CAS adatte alle famiglie Patronato: Indice Mappa 3 14 Bächlitalhütte 29 38 Chamanna da Tschierva 56 Semmai chili in più sulla schiena 4 15 Gelmerhütte 30 39 Rifugio Saoseo 57 CSS Assicurazione e CAS: 16 Windegghütte 31 40 Chamanna d’Es-cha 58 entusiasmare le famiglie per le escursioni 5 41 Chamanna digl Kesch 59 Svizzera Centrale 32 Insieme: PurePower Graubünden e 42 Chamanna da Grialetsch 60 17 Glattalphütte 33 Svizzera Turismo 6 43 Chamanna Tuoi 61 18 Lidernenhütte 34 Così l’escursionismo diventa un piacere 7 44 Chamanna Lischana 62 19 Etzlihütte 35 Consigli per l’equipaggiamento e il ristoro 8 45 Silvrettahütten 63 20 Treschhütte 36 Sicuri per strada 9 46 Carschinahütte 64 21 Leutschachhütte 37 L’esperienza del soggiorno in capanna: 47 Hundsteinhütte 65 22 Kröntenhütte 38 cose da sapere 10 48 Sardonahütte 66 23 Rugghubelhütte 39 Idee per il divertimento e il gioco 12 49 Spitzmeilenhütte 67 24 Sewenhütte 40 Indicazioni per consultare le pagine 50 Leglerhütte 68 25 Sustlihütte 41 delle capanne 14 26 Voralphütte 42 Vallese – Berna 15 27 Rotondohütte 43 1 Cabane du Vélan 16 Ticino 44 2 Cabane du Mont Fort 17 28 Capanna Piansecco 45 Impressum 3 Cabane des Dix 18 29 Capanna Cristallina 46 Editori: 4 Turtmannhütte 19 30 Capanna Basòdino 47 CSS Assicurazione, servizio Salute, Lucerna, www.css.ch 5 Schönbielhütte 20 e Club Alpino Svizzero
    [Show full text]
  • Morphogenèse De La Région De La Greina Depuis Le Dernier Maximum Glaciaire
    Morphogenèse de la région de la Greina depuis le Dernier Maximum Glaciaire Georgia Scapozza Cristian Scapozza Emmanuel Reynard Institut de Géographie Université de Lausanne Anthropole CH - 1015 Lausanne E-mails : [email protected] [email protected] In Lambiel C., Reynard E. et Scapozza C. (Eds) (2011). La géomorphologie alpine: entre patri- moine et contrainte. Actes du colloque de la Société Suisse de Géomorphologie, 3-5 sep- tembre 2009, Olivone (Géovisions n° 36). Institut de géographie, Université de Lausanne. Acte_Olivone.indb 99 24.02.11 15:55 Acte_Olivone.indb 100 24.02.11 15:55 Morphogenèse de la région de la Greina depuis le Dernier Maximum Glaciaire - 101 - Résumé La région de la Greina (Alpes suisses centrales) a fait l’objet d’une étude géomorpho- logique détaillée dans le but de reconstituer les étapes principales de sa morphoge- nèse depuis le Dernier Maximum Glaciaire (LGM). Il a été possible de reconstituer les flux de glace au LGM et au début du Tardiglaciaire et de documenter les étapes et les modalités de la déglaciation de la région entre la fin du Dryas ancien et le début de l’Holocène. Il a également été possible de mettre en évidence les principales phases holocènes d’activité torrentielle « paraglaciaire » et leurs relations avec le stock sédi- mentaire d’origine glaciaire dans la partie supérieure des bassins versants. Abstract The Greina region (Central Swiss Alps) was the object of a detailed geomorphological study in order to reconstruct the main morphogenetical steps since the Last Glacial Maximum (LGM). The ice flowlines during the LGM and at the beginning of the Lateglacial were defined and the glacier retreat between the end of the Oldest Dryas and the beginning of the Holocene was reconstructed.
    [Show full text]
  • Tourenbericht Mit Fotos Von Vrin-Greina-Olivone, T2-3
    Tourenbericht mit Fotos von Vrin-Greina-Olivone, T2-3 Bericht: bericht-2007-01-03-tourenbericht-mit-fotos-von-vrin-greina-olivone-t2-3 © 2013 SAC Aarau, http://sac-aarau.ch. Alle Rechte vorbehalten. Fotobericht vom 03. Januar 2007 mit 15 Fotos. Tourenbericht 30. September - 1. Oktober 2006, Bericht von Felix Studer, Fotos von Elisabeth Kretz. Tourenausschreibung: 30.September/1.Oktober: Vrin-Greina-Olivone T2-3 TL: Elisabeth Kretz LK: 1234, 1233, 1253 Art der Tour: Genusswanderung durch die in der Schweiz einzigartige Greina-Hochebene MZ Sa. ca. 4 Std. Aufstieg 1040 m, So. ca. 6 1/2 Std. Abstieg 1500 Hm Abfahrt Aarau ab 6.58 Uhr via Zürich- Chur-Ilanz nach Vrin. Kollektivbillett wird durch TL organisiert, sonst werden die TeilnehmerInnen tel. benachrichtigt Rückkehr Olivone ab 16.08 Uhr via Biasca-Gotthard-Zürich. Aarau an 20.27 Uhr Ausrüstung gute Wanderschuhe, Sonnen-u. Regenschutz, Stöcke. Verpflegung aus dem Rucksack (HP in der Hütte), für den 2. Tag kann für Fr. 8.50 ein Lunchpaket gekauft werden Kosten ca. Fr. 140.- (mit Halbtaxabo) Anmelden/Info bis 20. September bei TL, ... Durchführung bei unsicherem Wetter am 29. Sept. 18.00-20.00 Uhr. Tourenbericht: Samstag: Elisabeth Kretz konnte an ihrer ersten Tour als Tourenleiterin 13 TeilnehmerInnen begrüssen. Die Wetterlage sorgte für gemischte Gefühle, als am Walensee die Kurfirsten durch die verregneten Fenster nicht zu sehen waren. Nach Sargans hellte sich der Himmel langsam auf, und auch unsere Stimmung. Voll Begeisterung liessen wir den Kleinbus in Vrin abfahren und nahmen die 1000m Aufstieg zum Diesrutpass zu Fuss in Angriff. Bei Sogn Giusep gab's Ovo und Birnbrot und auf der Alp Diesrut 1899m genossen wir bei der Rast vollen Sonnenschein.
    [Show full text]
  • Region Greina GR / TI
    Region Greina GR / TI Strecke Vrin-Puzzatsch Strecke Rabius-Runcahez Strecke Olivone-Pian Geirett © swisstopo (BA 16024) © swisstopo (BA 16024) © swisstopo (BA 16024) In Kürze Busangebot Bus alpin Greina / 90.441 / 90.475 / 62.135 Saison 22.6, resp. 29.6 bis 29.09., resp. 6.10.2019 Betreiber AutoDaPosta SA (Vrin), M. Cathomas (Sumvitg), Autolinee Bleniesi SA (Bleniotal) Partner Surselva Tourismus, Sumvitg Turissem, Bellinzonese e Alto Ticino Turismo Medienauskünfte Samuel Bernhard, Geschäftsleiter Bus alpin, 044 430 19 31, [email protected] Bilder in hoher Auf- Samuel Bernhard, Geschäftsleiter Bus alpin, 044 430 19 31, [email protected] lösung auf Anfrage Lage Linien im Detail (mit ÖV): www.schweizmobil.ch (Vrin); www.schweizmobil.ch (Sumvitg); www.schweizmobil.ch (Bleniotal) Touristische Höhepunkte an Ausgangsorten Val Sumvitg: Kaskadenförmiger Jungrhein mit Wasserbecken in schillernden Grüntönen Val Lumnezia: das Tal des Lichts mit magischen Orten, charakteristischen Kirchen und Kapellen Valle di Blenio: Die Blenieser Gastronomie und Gastfreundschaft Der Star der Region: die mystische Greina- Hochebene. Die Greina ist aufgrund ihrer Bio- topvielfalt national geschützt. Detailbeschreibung: siehe www.busalpin.ch Spezielle Angebote / Saisonangebot Busrundtouren Savurusa und Orglas (Lumnezia) Besuch Caplutta Sogn Benedetg (Sumvitg) Die Greina-Tour (Blenio) Weitere Infos: www.surselva.info; www.sumvitg-turissem.ch; www.blenioturismo.ch Nationale Träger Nationale Sponsoren Region Greina GR / TI Fahrpläne Val Lumnezia, Sumvitg und Blenio Vrin, posta – Vrin, Puzzatsch (Rufbus) Täglich 22. Juni – 29. September 2019 als Rufbus, Voranmeldung bis 1 Std. vor Abfahrt unerlässlich: 079 483 83 69. Sonn- und allg. Feiertage Voranmeldungen bis am Vortag des Reisetages 12.00 Uhr. Reservierung an Werktagen: Mo-Fr 08:00-12:00 14:00-16:00 Sa: 08:00-12:00.
    [Show full text]
  • Final Report No. 2370 by the Swiss Transportation Safety Investigation Board STSB
    Schweizerische Sicherheitsuntersuchungsstelle SUST Service suisse d’enquête de sécurité SESE Servizio d’inchiesta svizzero sulla sicurezza SISI Swiss Transportation Safety Investigation Board STSB Final Report No. 2370 by the Swiss Transportation Safety Investigation Board STSB on the accident involving the Junkers Ju 52/3m g4e commercial aircraft, HB-HOT, operated by Ju-Air, on 4 August 2018 1.2 km south-west of Piz Segnas, within the municipality of Flims (in the canton of Grisons), Switzerland Swiss Transportation Safety Investigation Board STSB 3003 Bern Tel. +41 58 466 33 00, Fax +41 58 466 33 01 [email protected] www.sust.admin.ch Final report HB-HOT Acknowledgement Observations, photographs and videos provided to the Swiss Transportation Safety Investiga- tion Board (STSB) by citizens during the investigation significantly contributed to the investi- gation and to the final report that is now available. The STSB would like to thank everyone who spontaneously or upon corresponding request provided information and visual material for the investigation. The following authorities, organisations and companies have significantly and in an exemplary manner contributed to the success of the investigation: The Bureau d’Enquêtes et d’Analyses pour la Sécurité de l’Aviation Civile (BEA) Zurich Forensic Science Institute (FOR) The cantonal police of Grisons The municipality of Flims Flims Electric AG, Flims (canton of Grisons) MatExpert GmbH, Thun (canton of Bern) Mountain Lodge, Segnes pass Zurich University of Applied Sciences (ZHAW) Swiss Transportation Safety Investigation Board Page 2 of 78 Final report HB-HOT General information on this report In accordance with Article 3.1 of the 12th edition of annex 13, effective from 5 November 2020, to the Convention on International Civil Aviation of 7 December 1944 which came into force for Switzerland on 4 April 1947, as amended on 18 June 2019 (SR 0.748.0); Article 24 of the Federal Act on Civil Aviation of 21 December 1948, as amended on 1 Jan- uary 2020 (CAA, SR 748.0); Article 1, point 1 of Regulation (EU) No.
    [Show full text]
  • Campo Blenio – Lago Di Luzzone – Capanna Motterascio – Passo Della Greina – Capanna Scaletta
    Campo Blenio – Lago di Luzzone – Capanna Motterascio – Passo della Greina – Capanna Scaletta Wegbeschrieb mittel | 9.10 h | 27.4 km | 1457 Hm 1457 Hm | Motterascio, Scaletta | Jun – Okt Drei von fünf Zugängen zur Greina sind besonders beliebt: Val Lumnezia, Val Sumvitg und Valle di Blenio. Diese drei Täler sind nur über die Greinaebene miteinander verbunden. Keine Strasse und Grossartige Rundwanderung durch eine einzigartige Tundrenlandschaft! Von Campo keine Bergbahnen, sondern Wanderwege verknüpfen die Nachbarn miteinander. Blenio geht es zum Stausee Lago di Luzzone und zur Capanna Monterascio. Vom Greina- Ausgangspunkt der Wanderung ist die Busstation in Campo Blenio. Sich stärken und übernachten pass, welcher schon von den Römern benutzt wurde, hat man eine grandiose Aussicht kann man sich im Ristorante Albergo Genziana (+41 91 872 11 93). Wer will kann auch bis zum Lago in die Greinaebene und auf die umliegenden Berggipfel. Der Abstieg erfolgt via Scaletta- di Luzzone / Diga di Luzzone mit dem Bus Alpin hochfahren (Reservation erforderlich!). Man spart hütte, Pian Geirett zurück nach Campo Blenio. damit 80 Gehminuten und 400 Höhenmeter aufwärts ein. Der Bus Alpin fährt Anfangs Juli bis Oktober und ist im SBB-Fahrplan registriert. Ausgangs- & Endpunkt: Campo Blenio – Busstation Einkehr: Unterkunft und Verpflegung: Capanna Motterascio CAS, Capanna Scaletta, Von der Busstation in Campo Blenio geht es zuerst über die Brücke und der Strasse entlang zum Ristorante Albergo Genziana (Campo Blenio) kleinen Dorf Ghirone / Aquilesco. Hier beginnt ein gut markierter Weg, der bis zum Stausee Lago di nur Verpflegung: Ristorante Luzzone (Lago di Luzzone) Luzzone führt. Der Weg bis zum See wird nun deutlich steiler. Oben am See kann man eine Rast ein- Anforderungen: weiss-rot-weiss legen und im Ristorante Luzzone, das sich direkt vor der schwindelerregenden Luzzone-Staumauer befindet, einkehren.
    [Show full text]
  • Hydro Power Plants and Minimal Flow
    HYDRO POWER PLANTS AND MINIMAL FLOW Christa Meyer Swiss Greina-Foundation (SGS) Switzerland Swiss Greina Foundation (SGS) • SGS founded in 1986 • Non-governmental organisation • Between Grisons & Ticino surrounded by the Swiss Alps Greina high plateau: surrounded by the Swiss Alps Swiss Greina Foundation (SGS) • Initial aim (1986) was the rescue of the Greina high-plateau (2000 m / 6‘560 ft) • Current focus on safeguarding alpine river-flow regions & hydro power regulations concrete dams for the production of hydro power NOK power plant • power plant project in 1957 • 80m dam project to flood the Greina plateau • expected: 225 mio Kw/h of peak energy • successful struggle for the preservation of this unique landscape GREINA high plateau facts & figures •In 2006, 60% of Swiss electricity needs were covered by hydro power plants •International comparison: 56.6% (leader Norway: 98.8%) •90% of running waters are industrially utilised •4037 of 4485 running waters •primarily in alpine regions residual water flow: effects when flow is limited • Floodplains - the so called „rain forests“ of Europe - only survive if their roots of plants are sufficiently nurtured by water • low residual water leads to mud in the river bed & increases the amount of algae • changes in water temperature- and stability • quality of river shores are worsened: detrimental effects on numerous insects, amphibians and reptiles without residual water flow legal aspects : water laws • 1975 : Swiss sovereign votes for a new article in the constitution, regulating the securement of appropriate residual water flow. • 1991 : Federal law on the protection of waters effectuated. • „It shall legislate on water protection, on securing adequate residual water, on hydraulic engineering, on the safety of dams and on interventions to influence precipitation.“ (art.
    [Show full text]