Early solar system events and timescale

摘要: — Some recent information on the Mn-Cr and Al-Mg systems is reviewed. This used to derive constraints timing of processes events, which took place in early solar system. Using reasonable assumptions, a timeline constructed where estimated age system ∼4571 Ma. taken mark time when most calcium-aluminum-rich inclusions (CAIs) were starting form, process that may have lasted for several 105 years. Almost contemporaneously small planetesimals accreted served store these CAIs later dispersal among larger planetesimals. By large numbers tens kilometers size had formed, interior objects started melt through decay 26Al. Collisional disruption allowed gases, dust, escape into surrounding space. The fine droplets reacted with gas dust form chondrules, which, after rapid cooling, partially re-accreted onto residual rubble pile. primary chondrule formation, cases involving generations planetesimals, plausibly only ∼2 Towards end this period during following 3 4 Ma planetary hundred formed. They still stored enough energy continue melting from inside finally differentiate chemically stratified layers, basaltic volcanism occurring within few million