GRD0299S0
CIRCE 93-J
Serpentinite
Unknown
None
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1
Ritter 154 › Cabinet 34 › Drawer B
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Two cut samples (~9x4x2.5 cm and ~4.5x5x4 cm). Both samples are mottled. Thin blue veins and thicker light green serpentinite veins cross-cutting a fine green-peach groundmass. Occasional very small magnetite crystals. Billet piece.
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CIRCE
Indian Ocean
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N/A
Carbonate vein and subhedral opaque crystal in serpentine with a small amount of brown alteration.
5.0
plane
Carbonate vein and subhedral opaque crystal in serpentine with a small amount of brown alteration.
5.0
crossed
Carbonate vein and subhedral opaque crystal in serpentine with a small amount of brown alteration.
2.5
plane
Carbonate vein and subhedral opaque crystal in serpentine with a small amount of brown alteration.
2.5
crossed
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scan
crossed
GRD0299T0: Brown alteration of the fibrous serpentine crystals. Large carbonate veins in the sample. Occasional small cubic and subhedral opaque crystals as well as opaque veins. A trace amount of pyroxene crystals. A carbonate/hydrothermally altered serpentinite? (C. Eichler)
N/A
Fisher_GSABulletin_1971
Fisher, R.L., Sclater, J.G., McKenzie, D.P., 1971, Evolution of the Central Indian Ridge, Western Indian Ocean: Geological Society of America Bulletin, v. 82, no. 3, p. 553-562.