Chemistry Reference
In-Depth Information
tin-bearing skarns (tin is often in the silicates: tin-bearing garnet,
malayaïte CaSnTiO
5
); such skarns are either calcic skarns (low in boron,
rich in sulphides) or magnesian skarns (with boron minerals, pyroxenes,
etc);
stockworks of quartz veins (for example “tin porphyries” of Bolivia)
with stannite, silver sulfosalts, lead sulfoantimonides, bismuth,
bismuthinite;
hydrothermal veins (for example Cornwall deposits): cassiterite, wolf-
ramite, bismuth, bismuthinite, molybdenite, chalcopyrite, pyrite, pyr-
rhotite, arsenopyrite, löllingite.
Cassiterite is a heavy mineral easily deposited and concentrated in plac-
ers (deposits of Malaysia).
