The 500 Ma-old Thyon metagranite: A new A-type granite occurrence in the western Penninic Alps (Wallis, Switzerland)

The Thyon metagranite is located in the frontal part of the Siviez-Mischabel Nappe, in the western Penninic Alps. It is intrusive in a polymetamorphic banded volcanic complex as leucocratic concordant sills with pseudoaplitic rims. A distinct metamorphic schistosity is defined by dark-green Fe-rich biotite. Abundant mesoperthites, chess-board albite and low microcline are presumably related to magmatic stages and/or greenschist-facies metamorphic retrogression. Major, trace element and REE geochemistry, zircon typology, Y and Nb-bearing accessory minerals such as fergusonite and euxenite, all point to a metaluminous to peraluminous alkaline A-type granite. High-precision U-Pb zircon dating yielded a sub-concordant age of 500 +3/-4 Ma. The Thyon metagranite is the third record of a Cambro-Ordovician alkaline magmatic activity in the Alps. As A-type granitic magmatism is common in post-orogenic to anorogenic extensional tectonic regime, the Thyon intrusion could mark the transition between the Cadomian and the Caledonian orogenies.

Ma cure d'eau pour la guérison des maladies et la conservation de la santé (Ed. populaire) / par Séb. Kneipp,... ; [trad. de l'allemand par J. Bechtold qui signe le préambule]

Titre original : Meine Wasserkur

Hatta Mersoul Ma Idjemel ; Hatta Mersoul Ma Idjemel (suite) / Cheik Madani, chant [acc. instr.]

[Traditions. Afrique du Nord. Algérie]

Neidel Koum Ma Srali ; Neidel Koum Ma Srali (suite) / Cheik Madani, chant [acc. instr.]

[Traditions. Afrique du Nord. Algérie]

Ma Gemfa Sebra ; Ma Gemfa Sebra (suite) / Cheik Madani, chant [acc. instr.]

[Traditions. Afrique du Nord. Algérie]

Nouba de Ochak Lawa Farin II ; Nouba de Ochak Ma Lahu III / Troupe El Hadj Abdelslam Errbati, chant [acc. voc. et instr.]

[Traditions. Afrique du Nord. Maroc]

Latha Aoudlia Ma Nhaoudlik ; Moual Lathssibou Ana Reksi / Cheikha Zineb Zdidya, chant [acc. voc. et instr.]

[Traditions. Afrique du Nord. Maroc]

Ma Tkoulhass El Mamak ; Ma Tkoulhass El Mamak / Simon Ohayon et Hazar Cohen, duo voc. [acc. instr.]

[Traditions. Afrique du Nord. Maroc]

Moual Sika ; Ma Tguoulhass El Mamak / Cheikha Aicha La Hebrea, chant [acc. instr.]

[Traditions. Afrique du Nord. Maroc]

Ma L'Hbibi Malou ; Djebel Mina / Thami Ben Abdelkrim, chant [acc. instr.]

[Traditions. Afrique du Nord. Maroc]

Billahi Ma Sab ; Y Aibad / Cheloumou Souiri, chant [acc. voc. et instr.]

[Traditions. Afrique du Nord. Maroc]