Fluid and mineral inclusions and inclusion zones of cave calcite from Korsnäs Mine, western Finland

Abstract

Inclusions and crystal forms of calcite crystals from a cave in the Korsnäs lead-lanthanide mine in western Finland have been studied. The primary fluid inclusions in the scalenohedral yellowish calcite show homogenization temperatures of 79° to 103°C and salinities of 3.6 to 4.9 eq. wt. % NaCl. The prevailing crystal form is scalenohedron. In some specimens it reveals a rhombohedral phantom. Four mineralization stages are proposed on the basis of correlation between inclusion zones in multiple-zoned calcite crystals.