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Gran Zebrù Glacier (Vedretta del Gran Zebrù), Cedec Valley, Valfurva, Valtellina, Sondrio Province, Lombardy, Italy

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 46° North , 9° East (est.)
Margin of Error:~7km
Köppen climate type:ET : Tundra
Name(s) in local language(s):Vedretta del Gran Zebrù, Val Cedec (Valle di Cedec), Valfurva, Valtellina (Veltlin), Sondrio, Lombardia, Italia
Other regions containing this locality:The Alps, Europe


Blocks, rich in cavities, of dark grey calcareous breccia and yellowish limestone, at an elevation between 2850 and 2900 m, in the morainic deposits of Gran Zebrù Glacier. Calcite, which appears as scalenohedra up to 9 cm in length, is the main mineral and it is sometimes associated with oxidated cubic or cuboctahedral pyrite, dendritic manganese oxides and pink octahedral fluorite (Bedognè et al., 2006). Always in this area, white fibrous mammillary concretions of aragonite were found by P. Sigismund (Gramaccioli, 1962).

Calciphyre blocks. The mineral assemblage (clintonite, fassaite, spinel, epidote, aragonite, calcite, chlorite, biotite and chalcopyrite) of some blocks, found also at Vedretta di Solda (Suldenferner) (see http://www.mindat.org/loc-123257.html) in Solda Valley (South Tyrol), seems to indicate the same origin, i.e. an outcrop probably located in the area of Passo della Bottiglia (Königsjoch) (see http://www.mindat.org/loc-259789.html) and in any case along the watershed between Cedec and Solda valleys (Tomasi, 1940 and 1950; De Michele, 1968; Scaini, 1972). Therefore, these minerals are listed here and at the two above mentioned localities.

Mineral List


9 valid minerals.

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References

Gramaccioli, C.M. (1962) I minerali valtellinesi nella raccolta di Pietro Sigismund. Ed. privata, Milano, 179 pp.

Tomasi, L. (1940) Fassaite di Val Solda e sua paragenesi. Studi Trentini Sc. Nat., 21,85-111.

Tomasi, L. (1950) Studi petrografici dei filoni e contatti del Passo della Bottiglia (Gruppo dell'Ortler). Acta geol. Alpina, 2, 9-49.

De Michele, V. (1968) I minerali del Parco Nazionale dello Stelvio. In: Il Parco Nazionale dello Stelvio. Uff. Amm. Parco Bormio. Arti Grafiche Manfrini, Rovereto, 33-41.

Scaini, G. (1972) Minerali del Parco Nazionale dello Stelvio. Atti Soc. It. Sc. Nat. e Museo Civ. St. Nat. Milano, 113, 2, 150-152.

Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.

 
Mineral and/or Locality  
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