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Marosohihy Uranothorianite Mine, Manambolo Valley, Anosy Region
General view of the Marosohihy Uranothorianite Mine, abandoned in 1969 (?), geologically it is a U-Th-skarn.
Marosohihy Mine: typical ore with uranothorianite crystals (black) in white plagioclase accumulations in pyroxenite.
Marosohihy Mine: white plagioclase accumulations with corundum, see next photo.
Marosohihy Uranothorianite Mine: contact zone of pyroxenite (left), granitic dikes and marble.
Marosohihy Mine: typical phlogopite rich marble (“cipolin” in French); the marble may also contain uranothorianite.
Marosohihy Mine: subhedral, bright blue corundum (3 cm wide) in white plagioclasite.