Computer Science
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998e%26psl.164..345k&link_type=abstract
Earth and Planetary Science Letters, Volume 164, Issue 1-2, p. 345-352.
Computer Science
2
Scientific paper
Compositions of spinel and glassy melt inclusions in primitive olivine (Fo89.3-91) from basalt AII32 D11-177 at 43°N, Mid-Atlantic Ridge fall into two principal groups. The dominant (~90%) Group-I spinel and melt inclusions have typical MORB compositions. In contrast, Group-II Cr-spinels are strongly enriched in TiO2 (2.6-4.1 wt%), and Group-II melt inclusions show significant enrichment in SiO2 (54.6-58.4 wt%), TiO2, Na2O and K2O, whereas their CaO contents (9.3-11.1 wt%) are unusually low. Group-II melts are also remarkable in crystallizing high-Mg orthopyroxene (Mg# 91). These mineral associations and melt compositions are unusual for MORB, and are interpreted to result from interaction between MORB-like melts and harzburgitic peridotite at low pressure.
Crawford John A.
Kamenetsky Vadim
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