How did the Earth Get Here? ... Formation of the Earth by accretion: ... In the inner part of the solar system, only things which exist as a solid at high temperature are available (so how come there is so much water on the earth? -- answer later)
zebu.uoregon.edu/ph121/l7.html
The Earth took 30–40 million years to accrete from smaller 'planetesimals'. Many of these planetesimals had metallic iron cores and during growth of the Earth this metal re-equilibrated with the Earth's silicate mantle, extracting siderophile ('iron-loving') elements into the Earth's iron-rich core.
www.nature.com/nature/journal/v441/n7095/abs/nature0476... www.nature.com/nature/journal/v441/n7095/abs/nature04763.html
An explanation put forward to account for this disparity has been that the last 1% of the Earth's accretion occurred after the iron-rich core had separated from the mantle1,2. Recent debate has accordingly centred on which meteorite class or classes made up this 'late veneer' of accretion3.
www.nature.com/doifinder/10.1038/34396
Most of the matter found in the Earth probably had been formed by stars and then supernovae by about 7 billion years ago. We consider the Earth to have been formed by accretion approximately 4.4 to 4.6 billion years ago.
www.mansfield.ohio-state.edu/~sabedon/biol1010.htm
Accretion and core formation adds heat to the Earth, while mantle convection removes it from the Earth's interior ... Formation of the Earth's mantle at about 4.6-4.5 Ga is the result of a series of processes, including planetary accretion and core separation. These processes collectively lead to a very hot outer shell of...
quake.mit.edu/hilstgroup/MantleConvection/100298_notes.... quake.mit.edu/hilstgroup/MantleConvection/100298_notes.html
Hierarchical Earth accretion and the Hadean Eon ... find Journal of the Geological Society articles. Abstract: Geochemical traces from the Hadean Eon and terrestrial siderophile and volatile element data are discussed i... ... Research articles and archives from 6,500+ publications ... Read all of this article with a FREE trial...
www.highbeam.com/doc/1P3-1214845711.html?refid=ip_hf
Citation: Lanci, L., D. V. Kent, and P. E. Biscaye (2007), Meteoric smoke concentration in the Vostok ice core estimated from superparamagnetic relaxation and some consequences for estimates of Earth accretion rate, Geophys.
www.agu.org/pubs/crossref/2007/2007GL029811.shtml
An explanation put forward to account for this disparity has been that the last 1% of the Earth's accretion occurred after the iron-rich core had separated from the mantle1,2. Recent debate has accordingly centred on which meteorite class or classes made up this 'late veneer' of accretion3.
www.npg.nature.com/nature/journal/v391/n6663/abs/391166... www.npg.nature.com/nature/journal/v391/n6663/abs/391166a0.html
Geochemical traces from the Hadean Eon and terrestrial siderophile and volatile element data are discussed in the light of the standard, or hierarchical, model of planetary accretion, ... W. B. Hamilton; Earth's first two billion years--The era of internally mobile crust; Geological Society of America Memoirs,
jgs.geoscienceworld.org/cgi/content/abstract/164/1/3
"Noble Gases and Earth's Accretion" (1996) ... mantle isotopic crust plate earth ... solar earth planets atmosphere planetary...
www.cs.cmu.edu/~lemur/science/DOCS/00368075.di002386.00... www.cs.cmu.edu/~lemur/science/DOCS/00368075.di002386.00p0029t.html