Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"Earth's Upper Mantle"”.
-
Major element diffusion in garnet and the exsolution of majoritic garnet from aluminous enstatite in Earth's Upper Mantle
… is thought to be a major constituent of the Earth's transition zone. The transport properties of majoritic garnet are, however, not well constrained at the moment. The magnitude of the diffusivity of the majorite component in garnet influences our understanding of the homogenization time …
-
Kinetics of chemical exchange during melting of planetary interiors
… exchange during partial melting within the mantles of the terrestrial planets. Chapter 1 presents experiments on the diffusion rates of La, Ce, Nd, Dy and Yb in diopside at pressures of 0 to 2.5 GPa and temperatures of 1050 to 1450 'C. The results demonstrate a large variation in diffusivity …
-
Experimental studies of magmatic differentiation and the effects of water on phase stability
… of magmas and the modification of the upper mantle by hydrous fluid release during subduction. Chapter 1 models the crystallization of the asteroid Vesta, which melted almost completely during the early history of the solar system. Chemical modeling of the crystallization of this …
-
Peculiarities of crystal and magnetic structures of synthetic Co-olivine, Co 2 SiO 4
… presence of a huge amount of the olivines in the earth's upper mantle. Here, M is mainly Fe, Mg and Mn with small amounts of Ni, Ca, Co and Zn in mixed crystals. Many studies provided abundant data on the olivine-type oxides, especially at or above room temperature and at high pressure. However, …
-
High Pressure Melting of Iron with Nonmetals Sulfur, Carbon, Oxygen, and Hydrogen: Implications for Planetary Cores
The earth's core consists of a solid metallic center surrounded by a liquid metallic outer layer. Understanding the compositions of the inner and outer cores allows us to better understand the dynamics of the earth's core, as well as the dynamics of the cores of other terrestrial planets and moons. …