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Photos - serie 1

4.1) Mineralogy 4.2) Structure 4.3) Examples

According to the detailed structural analysis, aluminosilicate-bearing veins are formed between the D3 and D4 deformation phases. They cut the main schistosity (S2-S3a) and are folded by the deformation phase D4, linked to the Larecc's anticline. Additionally, thermometry by oxygen isotopes on quartz and aluminosilicates pairs confirms that the formation of those minerals tooks place at maximum of temperature, between D3 and D4. The formation of those veins is so contemporaneous with the peak of metamorphism.

Sigmoidal Knauern

Interpreted drawing of photo on the left

Sigmoidal vein (on the left) and its interpreted drawing (on the right) showing relations between phases D3 and D4.

Hereunder, recall of relations between various deformation phases of Alpe Larecc, notably aluminosilicate-bearing veins in D3.

Tab. cristallisation-deformation

1) Introduction | 2) Structural | 3) Thermobarometry | 4) TENSION GASHES | 5) Cartography | Bibliography | Thanks
Aluminosilicate-bearing veines: 4.1) Mineralogy | 4.2) STRUCTURE | 4.3) Examples | 4.4) Formation

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Photo - serie 2

Uni Lausanne || Geology 2003-2005 © Xavier Maeder & Julien Allaz
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Created: 10th May 2003
Last update: 3rd March 2012