Studies of the morphology, physical properties and chemical eomposition of cassiterite crystals have shown that the simple crystal form, crystal shape, ratio of crystal length to its width, polychroism and absorptivit...Studies of the morphology, physical properties and chemical eomposition of cassiterite crystals have shown that the simple crystal form, crystal shape, ratio of crystal length to its width, polychroism and absorptivity, spot colour, penetration twins, polynthetic twins, banded and zonal structures, and trace elements may be used as Wpomorphie features to eharaeterize the cassiterite minerogenetie stage in Lao-Chang mining area.展开更多
文摘Studies of the morphology, physical properties and chemical eomposition of cassiterite crystals have shown that the simple crystal form, crystal shape, ratio of crystal length to its width, polychroism and absorptivity, spot colour, penetration twins, polynthetic twins, banded and zonal structures, and trace elements may be used as Wpomorphie features to eharaeterize the cassiterite minerogenetie stage in Lao-Chang mining area.