GRD028VS0
CIRCE 87-2E
Mafic
Cenozoic › Paleogene › Eocene › Early Eocene
48.6
-
55.8
1
Ritter 154 › Cabinet 34 › Drawer A
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Large cut sample which measures ~5x6.5x6.5 cm from cut surface. Fine-grained green-grey interior with thin, light pink veins. Very high specific gravity. Mn-Fe crust on sample Billet. Original label: 14 August, 1968; fault gouge.
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CIRCE
Indian Ocean
Original: 9 00.05, 67 17.0 E. Depth: -2050 to -1935.
Latitude: 9.00083°
Longitude: 67.283333°
-1975.0 m a.s.l.
N/A
Small vein composed of pink (in PPL) thulite; Slightly altered matrix of fine-grained plagioclase, sanidine, clinopyroxene, and opaques
5.0
plane
Small vein blue (in XPL) thulite (epidote); Slightly altered matrix of fine-grained plagioclase, sanidine, clinopyroxene, and opaques
5.0
crossed
-
scan
crossed
GRD028VT0: Thulite (epidote) veins are bright blue in XPL (biaxial positive; 90 degree extinction angle; weakly pleochroic pink in PPL). Slightly altered matrix of fine-grained plagioclase, sanidine, clinopyroxene, and opaques (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.