L05_11-13_Sept_Earth_Interior(1)

Subdivided into connental crust 20 60 km thick and

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Unformatted text preview: C. Solid inner core Solid core of Earth with a radius of ~1200 km. Iron- nickel Mg, Fe Silicates alloy. ~6000° C. Grows slowly by Primarily Fe, crystalliza>on (freezing) of liquid outer minor Ni core. The crystalliza>on releases heat that, along with radioac>ve decay, keeps the interior of the Earth hot. 35 dynamical structure of Earth Temperature schema>c “Phase Diagram” for Fe liquid Fe solid Fe Pressure Liquid outer core Liquid layer extending from ~2700 km deep to ~5200 km deep. Viscosity is possibly quite low, similar to that of motor oil (~0.07 Pa*s). Composi>on is molten Fe (iron). Convec>on of the outer core is thought to be the source of Earth’s magne>c field. Temperatures range between 4400 – 6100° C. Solid inner core Solid core of Earth with a radius of ~1200 km. Iron- nickel Mg, Fe Silicates alloy. ~6000° C. Grows slowly by Primarily Fe, crystalliza>on (freezing) of liquid outer minor N c core. The i rystalliza>on releases heat that, along with radioac>ve decay, keeps the interior of the Earth hot. 36 dynamical structure of Earth Temperature schema>c “Phase Diagram” for Fe liquid Fe outer core Pressure inner core solid Fe Liquid outer core Liquid layer extending from ~2700 km deep to ~5200 km deep. Viscosity is possibly quite low, similar to that of motor oil (~0.07 Pa*s). Composi>on is molten Fe (iron). Convec>on of the outer core is thought to be the source of Earth’s magne>c field. Temperatures range between...
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This document was uploaded on 03/26/2014 for the course GEC AS.270.103 at Johns Hopkins.

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