In:
Science, American Association for the Advancement of Science (AAAS), Vol. 281, No. 5377 ( 1998-07-31), p. 677-679
Kurzfassung:
Ultrasonic interferometric measurements of the shear elastic properties of MgSiO 3 perovskite were conducted on three polycrystalline specimens at conditions up to pressures of 8 gigapascals and temperatures of 800 kelvin. The acoustic measurements produced the pressure ( P ) and temperature ( T ) derivatives of the shear modulus ( G ), namely (∂ G/∂P ) T = 1.8 ± 0.4 and (∂ G/∂T ) P = −2.9 ± 0.3 × 10 −2 gigapascals per kelvin. Combining these derivatives with the derivatives that were measured for the bulk modulus and thermal expansion of MgSiO 3 perovskite provided data that suggest lower mantle compositions between pyrolite and C1 carbonaceous chondrite and a lower mantle potential temperature of 1500 ± 200 kelvin.
Materialart:
Online-Ressource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.281.5377.677
Sprache:
Englisch
Verlag:
American Association for the Advancement of Science (AAAS)
Publikationsdatum:
1998
ZDB Id:
128410-1
ZDB Id:
2066996-3
ZDB Id:
2060783-0
SSG:
11
