Enriched mantle: Nd and Sr isotopes in diopsides from kimberlite nodules

Auteurs :
MENZIES, M.
MURTHY, V. R.

Description :
Nd and Sr isotope compositions of diopsides from micaceous garnet lherzolite nodules found in kimberlite pipes at Bultfontein and Kimberley, South Africa are reported. The diopside data extend the mantle array, as defined by uncontamined oceanic and continental basalts, to radiogenic Sr/Sr values. These data are used to demonstrate the ancient enriched, grossly heterogeneous nature of the sub-continental mantle, which complements the predominantly depleted nature of the sub-oceanic mantle.


Type de document :
Article de périodique

Source :
Nature London, 1980, vol. 283, n°. 5748, p. 634-636, Références bibliographiques : 37réf.

Date :
1980