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Geographical
sections. Italy, Adamello massif, southern areas |
Selection
of images from the collection. ©
Fernando Metelli. All the photos and other material on this site are copyright,
if you wish to use them please contact me for permission
The Adamello massif is a mountain range
in the Italian Alps, located in the provinces of Trento (Adamello-Brenta) and Brescia; it is
a protected area, under the two different provinces (the
two green areas on the picture) and, today, minerals
search is strictly forbidden.
The nucleus of the Group is a plutonic intrusion made of granite rocks (granodiorite; tonalite around the nucleus).
A lot of minerals are found in the metamorphic rocks, the older calcareous
formations transformed by the magma intruding, cooling down and consolidating |
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Augite
var fassaite
XX up to 2 cm, from a calcite vein (dissolved with acid). These pieces,
from the Adamello massif, are quite similar to the old ones coming from Monti
Monzoni
17x19cm
Costone di Val Bona, Breno, Brescia. Italy
Specimen n.451
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Clintonite
A lot of XX in the fassaite vein. This minerals -
belonging to the mica group - is still known with the name of xantofillite
(xantophillite). The piece (association between fassaite and clintonite) is typical from this locality, in the southern part of
Adamello
15x8.5cm
Lago della Vacca, Braone, Brescia. Italy
Specimen n.974
Another photo: a bigger
view
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Pyrite
Group of 4 XX, the biggest is 4cm long on edge. The XX are posted in a cavity of the
corroded calcite (as it is clearer in the next photo, piece
n.320)
10x12cm
Upper Val di Stabio, Braone, Brescia. Italy
Specimen n.122
Another photo:
bigger view |
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Pyrite
Twinned XX, edge up to 1.8 cm, in a cavity of corroded calcite.
There
are some other smaller and deformed pyrite XX
10x12cm
Upper Val di Stabio, Braone, Brescia. Italy
Specimen n.320
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Pyrite
On the top of a mass of calcite there is a X - edge: 2.5 cm -
that shows the cubic striated face, but with a more complex shape (see
the 2nd photo)
7x7.5cm
Upper Val di Stabio, Braone, Brescia. Italy
Specimen n.379
Another photo: a different
point of view
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Spinel
Octahedron 0.6cm edge, corroded, immersed in calcite
with an unidentified minerals, maybe humite, orange and
massive
5x6cm
Upper Val di Stabio, Brescia. Italy
Specimen n.674
Another photo: a bigger
view
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Thaumasite
Thin needles of thaumasite, posted in
wollastonite cavity. From a locality now exausted
5x10cm
Alpe Bazena, passo Croce Domini, Brescia. Italy
Specimen n.507
Another photo: a
bigger
view on detail
Another photo: a
bigger view |
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Tremolite
Thin needles grouped in rosettes, 1.5 cm wide,
immersed in calcite, in the deeply metamorphosed rock. This
mineral can easily be found near the village of Niardo
7x6cm
Niardo, Brescia. Italy
Specimen n.241
Another photo:
entire piece
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Vesuvianite
X, edge 1cm, in calcite with fassaite microcrystalline. It shows
the nearly tabular shape, typical of cornubianites and calcephires
in the metamorphic ring of Adamello mountains. Dosso degli Areti is one
of the most famous place for the Adamello vesuvianite
4x5cm
Dosso degli Areti, Braone, Brescia. Italy
Specimen n.136
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Vesuvianite
X, 1.7cm wide, in calcite, well defined but with a stocky
shape. It is another typical piece from Dosso degli Areti
4x5cm
Dosso degli Areti, Braone, Brescia. Italy
Specimen n.138
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