Samenvatting - Ontstaangeschiedenis van de aarde (Systeem Aarde: geologie)
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Course
Systeem Aarde: geologie
Institution
Universiteit Gent (UGent)
samenvatting van het hoofdstuk 'ontstaangeschiedenis van de Aarde' van het vak systeem Aarde: geologie. Deze leerstof werd gegeven door prof. Van Rooij.
Ontstaangeschiedenis van de
Aarde
Ontstaan van de Aarde
Big bang initiele gaswolk restwolk condensatie + accretie + fractionatie planetesimaal 1e
gen protoplanetaire schijf cloudlets planetesimaal 2e gen protoplaneet/Asteroïden
planeten + manen
Fase 1: big bang initiële gaswolk
Samenstelling van de gaswolk
George Lemaître
Big Bang
Intiële gaswolk
Restwolk
T-Tauri stadium
Gefractioneerde condensatie
Condensatie & accretie
o condensatiekernen
Fractionatie
o Refractaire bestanddelen
Planetesimalen (1e gen)
Kosmisch stof
Fase 2: Sferische gaswolk protoplanetaire schijf
Protoplanetaire schijf
Traagheidsmoment I
Impulsmoment L
hoeksnelheid
Graviteitsinstabiliteiten
Cloudlets
Planetesimalen (2e gen)
Kritische diameter
Fase 3: planetesimalen protoplaneten en asteroïden
Asteroïdee/protoplaneten
o Ceres, Pallas, Vesta
Homogene/heterogene accretie
Concentrische schalen
Fase 4: accretie van de Aarde en de Maan
Schalenstructuur van de Aarde
Hadeaan (-4Ga)
Magma-oceaan
Coagulatie
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