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(Baronnet et al., EURESCO, 2005)

SHEET SILICATES. (Baronnet et al., EURESCO, 2005). (sandwich). (toast). Mg(OH) 2 b=9.3A. SiO 4 b=8.7A. TALC. SERPENTINE. SERPENTINES. Images microscopie électronique haute résolution A. Baronnet. antigorite. chrysotile. Lamelles // (001) Optique: allongement +. Tubes // [010]

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(Baronnet et al., EURESCO, 2005)

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  1. SHEET SILICATES (Baronnet et al., EURESCO, 2005) (sandwich) (toast) Mg(OH)2 b=9.3A SiO4 b=8.7A TALC SERPENTINE

  2. SERPENTINES Images microscopie électronique haute résolution A. Baronnet antigorite chrysotile Lamelles // (001) Optique: allongement + Tubes // [010] Optique: fibres allongement +

  3. I ANTIGORITE

  4. RAPPEL D’OPTIQUE CRISTALLINE LAME AUXILLIAIRE (GYPSE) Superposée à ng => teinte monte Superposée à np => teinte descend - ng N’g np ng + np

  5. Antigorite lamellaire Moses Rocks, Colorado (60% altération) LP LP + lame onde N’g

  6. Antigorite lamellaire Moses Rocks, Colorado LP LP + GYPSE antigorite N’g olivine antigorite

  7. Antigorite maillée (mesh) Site cuprifère, ophiolite d’Oman (90% altération) N’g 100µm

  8. Antigorite maillée (mesh) Site cuprifère, ophiolite d’Oman (zoom) N’g 100µm

  9. relation 1 (100)Olivine || (001)Antigorite [001]Olivine || [010]Antigorite Pourquoi? Parce que Antigorite et Olivine ont les relations topotactiques suivantes: relation 2 (010)Olivine || (001)Antigorite [001]Olivine || [010]Antigorite Image A. Baronnet CTEM data

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