ARH306Y1 Lecture Notes - Silicate Minerals, Halite, Feldspar
Document Summary
O not exclusive: contaminants, streak - colour when mineral ground to a fine powder on streak plate. E. g. hematit red/brown: silicate minerals do not streak. Tend to be harder than the ceramic plate. The shape of mineral when broken (fig. Simplest is mica: breaks into sheets like books. Feldspar has 2 directions of cleavage, 90o to each other. Amphiboles has 2, not perpendicular. Rock salt halite, 3 directions. Crystallosgraphy: the study of crystal shapes (fig. Each mineral has a different habit. Canada"s mineral exports (approx. billion: need people prospecting, most metals are from the shield up north. Bancroft gemboree held first weekend of august. Mineral capital of canada. Sedimentary rocks (facies appearance of or face) Very often, rocks are just grouped into facies and cannot be positively identified in field. Form from sediments eroded from older rocks and transported by water, ice, or air. Compacted, cemented & lithified into clastic sedimentary rocks: conglomerate. 2 to 64 mm.
