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Melt-peridotite reaction recorded in the chemistry of spinel and melt inclusions in basalt from 43oN Mid Atlantic Ridge

Citation

Kamenetsky, VS and Crawford, AJ, Melt-peridotite reaction recorded in the chemistry of spinel and melt inclusions in basalt from 43oN Mid Atlantic Ridge, Earth and Planetary Science Letters, 164 pp. 345-352. ISSN 0012-821X (1998) [Refereed Article]

DOI: doi:10.1016/S0012-821X(98)00226-X

Abstract

Compositions of spinel and glassy melt inclusions in primitive olivine (Fo 89.3-91) 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 TiO 2 (2.6-4.1 wt%), and Group-II melt inclusions show significant enrichment in SiO 2 (54.6-58.4 wt%), TiO 2, Na 2O and K 2O, 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.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
Author:Crawford, AJ (Professor Anthony Crawford)
ID Code:15404
Year Published:1998
Web of Science® Times Cited:22
Deposited By:Earth Sciences
Deposited On:1998-08-01
Last Modified:2010-08-25
Downloads:0

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