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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 |
| UTAS Author: | Kamenetsky, VS (Professor Vadim Kamenetsky) |
| UTAS 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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