Fluid and Mineral Inclusions in Corundum from Gem Gravels in Sri Lanka

A. A. De Maesschalck and I. S. Oen
Institute of Earth Sciences, Free University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands

Abstract: Mineral and fluid inclusions were studied in seven gem corundums from gravels of three areas in Sri Lanka. All fluid inclusions are pure CO2. Microthermometry results on primary fluid inclusions suggest formation of corundum under granulite facies metamorphism (>630°C, 5.5 kbar). Secondary fluid inclusions indicate different retrograde events of post-metamorphic cooling and uplift for different source areas.

Keywords: corundum • fluid inclusions • gem gravels • Sri Lanka

Mineralogical Magazine; December 1989 v. 53; no. 373; p. 539-545; DOI: 10.1180/minmag.1989.053.373.04
© 1989, The Mineralogical Society
Mineralogical Society (www.minersoc.org)