Open system crystal fractionation and incompatible element variation in basalts

Pankhurst, R.J.. 1977 Open system crystal fractionation and incompatible element variation in basalts. Nature, 268 (5615). 36-38. https://doi.org/10.1038/268036a0

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Official URL: http://dx.doi.org/10.1038/268036a0

Abstract/Summary

O'HARA1 has recently proposed an open-system model for the fractional crystallisation of magmas involving continual replenishment of the magma chamber and only partial extraction of the fractionated liquid at each stage. This could produce a series of chemically uniform lavas (such as basalts) with very little resemblance to the primary mantle melt. It is claimed that the model can also explain large variations in the concentrations of incompatible trace elements and their inter-element ratios which would otherwise be ascribed to variable degrees of partial melting or inhomogeneity in the mantle source region. The purpose of this note is to explore the potential and limitations of O'Hara's model in this respect and to test it against the observed variability of Icelandic basalts.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1038/268036a0
ISSN:	0028-0836
Date made live:	23 Oct 2019 10:36 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/525577

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1038/268036a0

ISSN:

0028-0836

Date made live:

23 Oct 2019 10:36 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/525577