Chemical Aspects of the Formation of the Core

Details Chemical Aspects of the Formation of the Core Chemical Aspects of the Formation of the Core

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982rspta.306...49a&link_type=abstract

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 306, Issue 1492,

Mathematics

Logic

26

Scientific paper

The interpretation of data on lead isotopes in mantle material indicates that some of the lead has been pumped into the core during geological time. Such a continuous lead loss yields an increase of the U/Pb ratio in the mantle. Quantitative modelling of this effect permits an evaluation of the core's growth curve. In the preferred model, 85% of the core would have been formed in the early period of the Earth's history (50-200 Ma after 4.55 Ga ago) and 15% later on, and its accretion continues. Some of the consequences of such a process are reviewed.

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