Abstract
The grain growth rates of MgSiO3 perovskite and periclase in aggregates have been determined at 25 gigapascals and 1573 to 2173 kelvin. The average grain size (G) was fitted to the rate equation, and the grain growth rates of perovskite and periclase were G10.6 = 1 x 10-57.4 t exp(-320.8/RT) and G10.8 = 1 x 10-62.3 t exp(-247.0/RT), respectively, where t is the time, R is the gas constant, and T is the absolute temperature. These growth rates provide insight into the mechanism for grain growth in minerals relevant to the Earth's lower mantle that will ultimately help define the rheology of the lower mantle.
| Original language | English |
|---|---|
| Pages (from-to) | 2052-2054 |
| Number of pages | 3 |
| Journal | Science |
| Volume | 274 |
| Issue number | 5295 |
| DOIs | |
| Publication status | Published - Dec 20 1996 |
| Externally published | Yes |
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Grain growth rates of MgSiO3 perovskite and periclase under lower mantle conditions. / Yamazaki, Daisuke; Kato, Takumi; Ohtani, Eiji; Toriumi, Mitsuhiro.
In: Science, Vol. 274, No. 5295, 20.12.1996, p. 2052-2054.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Grain growth rates of MgSiO3 perovskite and periclase under lower mantle conditions
AU - Yamazaki, Daisuke
AU - Kato, Takumi
AU - Ohtani, Eiji
AU - Toriumi, Mitsuhiro
PY - 1996/12/20
Y1 - 1996/12/20
N2 - The grain growth rates of MgSiO3 perovskite and periclase in aggregates have been determined at 25 gigapascals and 1573 to 2173 kelvin. The average grain size (G) was fitted to the rate equation, and the grain growth rates of perovskite and periclase were G10.6 = 1 x 10-57.4 t exp(-320.8/RT) and G10.8 = 1 x 10-62.3 t exp(-247.0/RT), respectively, where t is the time, R is the gas constant, and T is the absolute temperature. These growth rates provide insight into the mechanism for grain growth in minerals relevant to the Earth's lower mantle that will ultimately help define the rheology of the lower mantle.
AB - The grain growth rates of MgSiO3 perovskite and periclase in aggregates have been determined at 25 gigapascals and 1573 to 2173 kelvin. The average grain size (G) was fitted to the rate equation, and the grain growth rates of perovskite and periclase were G10.6 = 1 x 10-57.4 t exp(-320.8/RT) and G10.8 = 1 x 10-62.3 t exp(-247.0/RT), respectively, where t is the time, R is the gas constant, and T is the absolute temperature. These growth rates provide insight into the mechanism for grain growth in minerals relevant to the Earth's lower mantle that will ultimately help define the rheology of the lower mantle.
UR - http://www.scopus.com/inward/record.url?scp=0030303018&partnerID=8YFLogxK
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U2 - 10.1126/science.274.5295.2052
DO - 10.1126/science.274.5295.2052
M3 - Article
VL - 274
SP - 2052
EP - 2054
JO - Science
JF - Science
SN - 0036-8075
IS - 5295
ER -