Earth and Planetary Sciences ETDs
Publication Date
Summer 7-13-2022
Abstract
Clinopyroxene is not only an important mineral phase in the pyrolitic upper mantle, but also one of the dominated mineral phases in the subducted or delaminated eclogitic materials in the deep Earth. Identifying and locating these eclogitic materials requires the knowledge of the thermoelastic properties of clinopyroxene under high pressure-temperature conditions. In this dissertation, we have measured the single-crystal elastic properties of jadeite and omphacite, which are major clinopyroxene phases in the eclogitic materials, up to 18 GPa 700 K by Brillouin spectroscopy and utilized these data to identify the eclogitic heterogeneities in the mantle.
We also measured the viscosity of kimberlite magma, which carries eclogite xenoliths, diamonds, and other deep mantle phases to the Earth’s surface through an ultra-fast eruption trajectory. We found the viscosity of volatile-rich kimberlite magma is extremely low under high pressure-temperature conditions and utilized these data to model the kimberlite magma ascent and eruption process.
Degree Name
Earth and Planetary Sciences
Level of Degree
Doctoral
Department Name
Department of Earth and Planetary Sciences
First Committee Member (Chair)
Jin Zhang
Second Committee Member
Brandon Schmandt
Third Committee Member
Adrian Brearley
Fourth Committee Member
Joshua P. Townsend
Fifth Committee Member
Przemek Dera
Project Sponsors
NSF
Language
English
Document Type
Dissertation
Recommended Citation
Hao, Ming. "Single-crystal elasticity of clinopyroxenes and the viscosity of kimberlite magma under high pressure-temperature conditions." (2022). https://digitalrepository.unm.edu/eps_etds/327
