Boninites, Komatiites and ophiolite basalts

Auteurs :
CAMERON, W. E.
NISBET, E. G.
DIETRICH, V. J.

Description :
The rare Phanerozoic rock type boninite petrographically resembles Archaean basaltic komatiites and the range of boninite compositions overlaps that of basaltic komatiites. Quench amphibole and hydrous glass in the groundmass of boninites confirme earlier ideas that they may be the products of partial melting of peridotite in hydrous conditions, whereas basaltic komatiites have been assumed to result from fractionation of dry melts. Where field relationships are known, boninites are found either in ophiolite, or a fore-arc tectonic environment.


Type de document :
Article de périodique

Source :
Nature London, 1979, vol. 280, n°. 5723, p. 550-553, Références bibliographiques : 39 réf.

Date :
1979