Perovskite in Earth's deep interior
Kei Hirose1,2, Ryosuke Sinmyo3,2, John Hernlund3
1Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Tokyo 152-8550, Japan. kei@elsi.jp.
Science (New York, N.Y.)
|November 11, 2017
Summary
Silicate perovskites are key minerals in Earth's deep interior and influence planetary evolution. Understanding their properties is crucial for comprehending mantle dynamics and the development of rocky planets.
Area of Science:
- Geophysics
- Mineral Physics
- Planetary Science
Background:
- Silicate perovskites are abundant in Earth's lower mantle (>660 km depth).
- Magnesium-rich perovskite transitions to post-perovskite at the core-mantle boundary.
- Calcium-rich perovskite, though minor, records chemical differentiation.
Purpose of the Study:
- To elucidate the significance of mantle perovskites in Earth's structure and evolution.
- To highlight the role of perovskites in understanding terrestrial planet development.
Main Methods:
- Analysis of mineral physics properties.
- Geochemical interpretation of trace elements in perovskites.
Main Results:
- Perovskite properties dictate lower mantle rock transport.
- These minerals are vital for understanding Earth's dynamic evolution.
- Perovskites are crucial components of rocky planets beyond Mars.
Conclusions:
- Mantle perovskites are fundamental to Earth's internal dynamics.
- Their study provides insights into the evolution of terrestrial planets across the universe.
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