ESYS 104 Study Guide - Midterm Guide: Source Rock, Solar Cycle, Seafloor Spreading
8 Dec 2011
School
Department
Course
Professor
Document Summary
Happens at a known, fixed rate in isotopes (rate of decay) At time t) (no= pop at time 0) (e= nat. log. ) (r=growth/decay rate) half-life: nt/no=1/2=e-rt. Ore= valuable/useful mineral that is economic to mine. Depends on concentration, market value, extraction costs, . Concentration factors depend on abundance and cost of extraction. Concentration processes: hydrothermal (hot, water-rich), metamorphic (heat and pressure), magmatic (melting), sedimentary (precipitation from lake), residual (weathering), placer (waves) Impacts: ecosystem disturbance, energy consumption, pollution of water, acid rain. Maturation and migration (cooking of source rock) Trap and seal (keeps oil from rising to surface) Keeps us cool, radiates/reflects the sun"s radiation back. Reservoirs: sediments and rocks, deep ocean, soils, ocean surface, vegetation, atmosphere. Sources: volcanoes (+), photosynthesis (-), decay of plants (+), hydrolysis (-), fossil fuel burning (+) The cycle is balanced until we take out co2 from sediments and put it into the atmosphere. Cold oceans contain more carbon than warm oceans.
