Results 211 to 220 of about 4,939,312 (268)

What Is Your Diagnosis? Blood Smear From a Mixed‐Breed Dog

Veterinary Clinical Pathology, EarlyView.
Laura S. Peres, Lina C. Bilhalva, Camila B. E. Mello, Abílio G. Silva, Andrea P. Santos, Stella F. Valle   +5 more
wiley   +1 more source

Life on Mars? The physiological perspective

Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

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Water in Earth's Lower Mantle

Science, 2002
Secondary ion mass spectrometry measurements show that Earth's representative lower mantle minerals synthesized in a natural peridotitic composition can dissolve considerable amounts of hydrogen. Both MgSiO 3 -rich perovskite and magnesiowüstite contain about 0.2 weight percent (wt%) H 2 O ...
Murakami, M., Hirose, K., Yurimoto, H., Nakajima, S., Takafuji, N.   +4 more
openaire   +2 more sources

Stability of Ferropericlase in the Lower Mantle

Science, 2000
We have heated ferropericlases (Mg 0.60 Fe 0.40 )O and (Mg 0.50 Fe 0.50 )O to temperatures of 1000 kelvin at pressures of 86 gigapascals, simulating the stability of the solid solution at physical conditions relevant to Earth's lower mantle. The
, Dubrovinsky, , Dubrovinskaia, , Saxena, , Annersten, , Hålenius, , Harryson, , Tutti, , Rekhi, , Le Bihan T   +8 more
openaire   +2 more sources

The Earth's Lower Mantle and Core

Elements, 2008
More than 90 percent of the Earth's mass is composed of iron, oxygen, silicon and magnesium, distributed among a metal-rich core, a silicate-rich mantle and more highly fractionated crustal rocks (less than 1% of the total). Mantle and core compositions can be approximated quite easily provided the bulk-Earth composition is assumed to be the same as ...
Fiquet, G., Guyot, F., Badro, J.
openaire   +2 more sources

Radiative conductivity in the Earth’s lower mantle

Nature, 2008
Iron in crustal and mantle minerals adopts several possible oxidation states: this has implications for biogeochemical processes, oxygenation of the atmosphere and the oxidation state of the mantle. In the deep Earth, iron in silicate perovskite, (Mg(0.9)Fe(0.1))SiO(3), and ferropericlase, (Mg(0.85)Fe(0.15))O, influences the thermal conductivity of the
Goncharov, Alexander F., Haugen, Benjamin D., Struzhkin, Viktor V., Beck, Pierre, Jacobsen, Steven D.   +4 more
openaire   +3 more sources

Earth's rugged lower mantle

Science, 2019
Seismic data reveal kilometer-scale topography of the lower-mantle ...
openaire   +2 more sources

Inhomogeneties in the lower mantle

Physics of the Earth and Planetary Interiors, 1972
Abstract A summary of results obtained from the direct dd T /d Δ measurements at several arrays in the U.S.S.R. is presented. Spherical layering of the lower mantle is firmly established. Layers of high P wave velocity gradient are found near the depths 900 km, 1300 km, 1700 km, 2000 km, and 2500 km.
L.P. Vinnik, A.A. Lukk, A.V. Nikolaev
openaire   +1 more source

The composition of the lower mantle

Physics of the Earth and Planetary Interiors, 1970
The equation of state of the lower mantle is found by requiring that both the density and the seismic parameter ∅ = (∂P / ∂P_s = V ^2-(4/3)V^2_s be satisfied. The zer the lower mantle can then be found and the mean atomic weight can be inferred. For most published density models for the Earth the FeO content of the lower mantle is greater than the ...
Anderson, Don L., Jordan, T.
openaire   +2 more sources

Ferropericlase—a lower mantle phase in the upper mantle

Lithos, 2004
Experiments on compositions along the join MgO–NaA3+Si2O6 (A=Al, Cr, Fe3+) show that sodium can be incorporated into ferropericlase at upper mantle pressures in amounts commonly found in natural diamond inclusions. These results, combined with the observed mineral parageneses of several diamond inclusion suites, establish firmly that ferropericlase ...
Gerhard P. Brey, Vadim Bulatov, Andrei Girnis, Jeff W. Harris, Thomas Stachel   +4 more
openaire   +1 more source