Boron isotope compositions were measured in kornerupine and tourmaline from lenses consisting primarily of kornerupine, plagioclase corundum. The occur within hornblende-gneiss or along the boundary between this gneiss an amphibolite lens at Akarui Point Lützow-Holm Complex, Prince Olav Coast, East Antarctica. peak metamorphic conditions have been estimated to be ~ 800-900 oC 8-11 kbar. δ11B wh...

The Jiajika rare metal deposit contains the largest area of granitic pegmatite-type deposits in China. X03 vein is an immense dominated by lithium, which was found recent years. contact metamorphic belt tourmalinization and petrochemistry widely developed its wall rocks, altered rocks formed contain Li other mineralization. In this paper, tourmaline different divided into four types: two-mica q...

tourmalinization characterizes the most pervasive alteration type in the nezam abad ore deposit, west-central iran. it delineates high-temperature centers of mineralization and together with quartz and cassiterite form inner parts of the alteration halo. the composition of tourmalines plots mostly along and between the proton and alkali-deficient end members. tourmaline in quartzdioritic host i...