dorsal/arxiv
View SchemaMelting of San Carlos olivine in the presence of carbon at 6-12 GPa
| Authors | Jozsef Garai, Tibor Gasparik |
|---|---|
| Categories | |
| ArXiv ID | physics/0307132 |
| URL | https://arxiv.org/abs/physics/0307132 |
Abstract
Experiments at 6-12 GPa showed that San Carlos olivine surrounded by carbon melts incongruently at 1400 C and higher temperatures, producing olivine with lower Fe contents, pyroxene, carbide, and carbonate melt. The relatively low melting temperature of 1400 C, independent of pressure, is consistent with carbonate melting. The new evidence for the reduced stability of olivine at high temperatures in the presence of carbonate melts is consistent with geophysical observations, and results in a substantially improved agreement between the experimentally determined phase relations and the observed seismic velocity structure of the upper mantle.
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"abstract": "Experiments at 6-12 GPa showed that San Carlos olivine surrounded by carbon\nmelts incongruently at 1400 C and higher temperatures, producing olivine with\nlower Fe contents, pyroxene, carbide, and carbonate melt. The relatively low\nmelting temperature of 1400 C, independent of pressure, is consistent with\ncarbonate melting. The new evidence for the reduced stability of olivine at\nhigh temperatures in the presence of carbonate melts is consistent with\ngeophysical observations, and results in a substantially improved agreement\nbetween the experimentally determined phase relations and the observed seismic\nvelocity structure of the upper mantle.",
"arxiv_id": "physics/0307132",
"authors": [
"Jozsef Garai",
"Tibor Gasparik"
],
"categories": [
"physics.geo-ph"
],
"title": "Melting of San Carlos olivine in the presence of carbon at 6-12 GPa",
"url": "https://arxiv.org/abs/physics/0307132"
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