GEO 1111 Lecture 8: GEO1111 Lecture 8

• School: University of Ottawa
• Department: Geology
• Course: GEO 1111
• Professor: Robert Jack Cornett

Document Summary

Continental crust is enriched in si, al, (k,na,ca) on the lighter side, rocks formed silicic or felsic. Ocean crust ar rock enriched in some other elements mg, fe ultra mafic or baic. Definite chemical composition of elements in a chemical formula and a crystal structure. Combination of one or more elements in specific proportion. O, al, ca, na, si, fe, mg, k: temperature and pressure at time of formation. Compare diamond and graphite (same chemistry different structures: size and change in atoms and ions. Non-silicate minerals: oxides, sulfides, sulfates, native elements (au), carbonates. Magma molten rock and contains crustal and gases within the earth. Melt generally only the liquid portion of the process. Lava molten rock and contains crystals and gases on the surface of the earth. Raise temperature as the pressure goes up the temperature will go up to, raise temperature along the temperature gradient, Liquid magma has random atoms suspended in non-crystaline structure.