Document Detail

The Earth's early evolution.
MedLine Citation:
PMID:  7667634     Owner:  NLM     Status:  MEDLINE    
The Archean crust contains direct geochemical information of the Earth's early planetary differentiation. A major outstanding question in the Earth sciences is whether the volume of continental crust today represents nearly all that formed over Earth's history or whether its rates of creation and destruction have been approximately balanced since the Archean. Analysis of neodymium isotopic data from the oldest remnants of Archean crust suggests that crustal recycling is important and that preserved continental crust comprises fragments of crust that escaped recycling. Furthermore, the data suggest that the isotopic evolution of Earth's mantle reflects progressive eradication of primordial heterogeneities related to early differentiation.
S A Bowring; T Housh
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  269     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  1995 Sep 
Date Detail:
Created Date:  1995-10-12     Completed Date:  1995-10-12     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1535-40     Citation Subset:  IM    
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge 02139, USA.
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MeSH Terms
Earth (Planet)*
Reg. No./Substance:
0/Isotopes; 7440-00-8/Neodymium

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