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Cavradi gorge, Curnera Valley, Tujetsch (Tavetsch), Vorderrhein Valley, Grischun (Grisons; Graubünden), Switzerland

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Latitude & Longitude (WGS84): 46° 38' 39'' North , 8° 42' 33'' East
Latitude & Longitude (decimal): 46.64417,8.70917
Other regions containing this locality:The Alps, Europe
Köppen climate type:ET : Tundra
Name(s) in local language(s):Cavradischlucht, Val Curnera, Tujetsch (Tavetsch), Vorderrheintal, Graubünden (Grisons; Grischun), Schweiz (Suisse; Svizzera)


The Cavradi gorge forms the northern exit of the Val Curnera.
The central part of the gorge cuts through Permian and Carboniferous rocks of the Urseren-Gavera zone, belonging to the Gotthard massif. These rocks consist of mica schists and gneisses that contain zones with a high concentration of Alpine-type fissures. The famous iron rose specimens with epitactically overgrown rutile and copper minerals (djurleite, digenite, etc.) come from this part of the gorge.
To the north, the gorge cuts through gneisses of the "Tavetscher Zwischenmassiv" with a different mineralization ("anatase zone") that also contains a lot of Alpine-type fissures.
To the south, close to the Lai da Curnera reservoir, paragneisses of the Gotthard massif are exposed; these rocks are relatively poor in pockets and minerals. (Hager et al. 2013)

NOTE: The grid reference is centered on the area.

Mineral List


34 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Permian
252.17 - 298.9 Ma



ID: 2347706
Metamorphe Gesteine, meist Metasedimente

Age: Permian (252.17 - 298.9 Ma)

Lithology: Metamorphic rocks, mostly metasedimentary

Reference: Geological Institute. Geological Map of Switzerland 1:500,000. isbn: 3906723399. University of Bern. [49]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.
Mineral News: 6:3: 1-2.
Bonanomi, Y.-P. (1989) Geologie, Petrographie und Mineralogie der Region Nalps-Cavradi. Diploma Thesis at ETH Zürich, 106pp.
Bonanomi, Y.-P. (1990) Die Erzmineralien der Cavradi-Schlucht. Schweizer Strahler: 1990(8): 470-479.
Graeser, S. (1998) Alpine minerals: a review of the most famous localities of the Central swiss Alps. Rocks and Minerals: 73: 14-32.
Jahn, S. (2003) Die Cavradi-Schlucht. Mineralien-Welt: 14(6): 18-38.
Sialm-Bossard, V. (2006) Eine außerordentliche Kluft in Cavradi. Schweizer Strahler: 2006(1): 11-20.
Hager, C., Mattis, J., Reith, P., Venzin, T. (2013) Cavradi. Publisher Jochen Mattis, Reinach, Switzerland. 216pp. [in German and English]
Reith, P., Venzin, T. (2016) Strahler und Klüfte der Cavradischlucht, Schweiz. Lapis: 41(7-8): 12-31.

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