EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Vidal & Dosso 1978
Vidal, P. and Dosso, L. (1978). Core formation: Catastrophic or continuous? Sr and Pb isotope geochemistry constraints. Geophysical Research Letters 5: doi: 10.1029/GL005i003p00169. issn: 0094-8276.

The negative trend between 87Sr/86Sr and 206Pb/204Pb ratios shown by most oceanic island basalts and the Rb-Sr and Pb mantle isochrons are ascribed to the end of sulfide segregation, about 2 b.y. ago, in the deep mantle, because this process produces an opposite evolution of &mgr; (238U/204Pb) and Rb/Sr ratios of the residual rocks. These sulfides probably contributed to the core growth. Other isotopic arguments lead to the conclusion of an early and quick core formation; it is, however, proposed here that the core growth continued, but at much slower rate, for ca. 3 b.y. after the initial separation.

BACKGROUND DATA FILES

Abstract

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit