EARTH221 Lecture Notes - Lecture 15: Boiling Point, Butane, Covalent Bond
26 Aug 2016
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Document Summary
Chemical direct precipitation from the water column without direct influence by biology: caco3 limestone, camg(co3)2 dolostone, evaporites form in water body restricted from emptying into ocean. Crude oil: sour rich in sulfur (hard and expensive to remove, sweet trace amounts of sulfur present, refining. Since the hydrocarbons have different boiling temperatures, the lighter ones are heated to the boiling point and removed: residuum. Heavy complex hydrocarbon molecules semi-solid form of petroleum: raising the temperature by too much will destroy crude oil completely and only gas and refractory carbon (graphite) will remain, composition. All c valence electrons used in single covalent bonds: chemically inert. Formation/accumulation of petroleum: most common source rock black shale. More organic matter higher quality: trapping petroleum. Layer containing petroleum is overlain by low permeability trap like shale: formation: Water-rich amino acids, proteins) are broken down to h2o and co2 during diagenesis: other more resistant forms of organic matter are converted to kerogen.
