The partial molar volume of carbon dioxide in peridotite partial melt at high pressure
The partial molar volume of CO 2 ( V ¯ C O 2 ) in silicate melt was determined for a komatiite composition using high pressure sink/float experiments in a multi-anvil press. The density of the experimental melt at pressure was determined by observing sinking and floating of pure forsterite (Fo100) a...
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Published in | Earth and planetary science letters Vol. 312; no. 3; pp. 429 - 436 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.12.2011
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Subjects | |
Online Access | Get full text |
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Summary: | The partial molar volume of CO
2 (
V
¯
C
O
2
) in silicate melt was determined for a komatiite composition using high pressure sink/float experiments in a multi-anvil press. The density of the experimental melt at pressure was determined by observing sinking and floating of pure forsterite (Fo100) and forsterite (Fo90) buoyancy markers. Values for
V
¯
C
O
2
were bracketed at 4.3
GPa (23.71
cm
3/mol) and at 5.5
GPa (22.06
cm
3/mol), normalized to 2123
K. Combining the current data with previous work we now more accurately constrain the compression curve of
V
¯
C
O
2
over the pressure range of 1.0
×
10
−
4
to 20
GPa. These data allow the calculation of density at pressure of carbonated silicate melts, such as kimberlite and silica undersaturated alkali basalts, and the determination of their buoyancy and eruptibility.
► We determined the partial molar volume of CO
2 in peridotite partial melt. ► Values were bracketed at 4.3
GPa (23.71
cm
3/mol) and 5.5
GPa (22.06
cm
3/mol), at 2123
K. ► Data were combined with previous work to constrain the
V
¯
C
O
2
compression curve to 20
GPa. ► With these data density of carbonated silicate melts can be calculated at pressure. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0012-821X 1385-013X |
DOI: | 10.1016/j.epsl.2011.10.021 |