Abstract
Electrical conductivities of molten Hawaiian tholeiite and Crater Lake andesite were measured between 1200oC and 1400oC at atmospheric pressure and at pressures up to 17 and 25 kbar, respectively. Isobaric plots of log sigma versus 1/T (sigma is electrical conductivity) are linear, with the exception of the zero pressure tholeiite melt data. Conductivities decrease with increasing pressure in both melts, with the andesitic melt exhibiting a greater pressure dependence. Between 5 and 10 kbar abrupt decreases in the slopes of isothermal log sigma versus P plots (ie. decreases in activation volume) are observed for both rock melts. This discontinuity probably reflects changes in melt structure.-from Authors
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2413-2430 |
| Number of pages | 18 |
| Journal | Journal of Geophysical Research |
| Volume | 88 |
| Issue number | B3 |
| State | Published - 1983 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Environmental Science(all)
Cite this
Electrical conductivity of molten basalt and andesite to 25 kilobars pressure : geophysical significance and implications for charge transport and melt structure. / Tyburczy, James; Waff, H. S.
In: Journal of Geophysical Research, Vol. 88, No. B3, 1983, p. 2413-2430.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrical conductivity of molten basalt and andesite to 25 kilobars pressure
T2 - geophysical significance and implications for charge transport and melt structure.
AU - Tyburczy, James
AU - Waff, H. S.
PY - 1983
Y1 - 1983
N2 - Electrical conductivities of molten Hawaiian tholeiite and Crater Lake andesite were measured between 1200oC and 1400oC at atmospheric pressure and at pressures up to 17 and 25 kbar, respectively. Isobaric plots of log sigma versus 1/T (sigma is electrical conductivity) are linear, with the exception of the zero pressure tholeiite melt data. Conductivities decrease with increasing pressure in both melts, with the andesitic melt exhibiting a greater pressure dependence. Between 5 and 10 kbar abrupt decreases in the slopes of isothermal log sigma versus P plots (ie. decreases in activation volume) are observed for both rock melts. This discontinuity probably reflects changes in melt structure.-from Authors
AB - Electrical conductivities of molten Hawaiian tholeiite and Crater Lake andesite were measured between 1200oC and 1400oC at atmospheric pressure and at pressures up to 17 and 25 kbar, respectively. Isobaric plots of log sigma versus 1/T (sigma is electrical conductivity) are linear, with the exception of the zero pressure tholeiite melt data. Conductivities decrease with increasing pressure in both melts, with the andesitic melt exhibiting a greater pressure dependence. Between 5 and 10 kbar abrupt decreases in the slopes of isothermal log sigma versus P plots (ie. decreases in activation volume) are observed for both rock melts. This discontinuity probably reflects changes in melt structure.-from Authors
UR - http://www.scopus.com/inward/record.url?scp=0020666469&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0020666469&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0020666469
VL - 88
SP - 2413
EP - 2430
JO - Journal of Geophysical Research: Atmospheres
JF - Journal of Geophysical Research: Atmospheres
SN - 2169-897X
IS - B3
ER -