Coupled 142Nd-143Nd evidence for a protracted magma ocean in Mars
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Summary
This summary is machine-generated.Mars
Area Of Science
- Planetary Science
- Geochemistry
- Cosmochemistry
Background
- Early silicate differentiation is key to understanding terrestrial planet evolution.
- Planetary magma ocean longevity is poorly constrained.
- Mars's interior preserves early differentiation records due to limited convection.
Purpose Of The Study
- To resolve early silicate differentiation timescales on Mars.
- To investigate the history of Martian magma ocean crystallization.
Main Methods
- Utilized short-lived 146Sm-142Nd and long-lived 147Sm-143Nd chronometers.
- Analyzed a suite of Martian Shergottite, Nakhla, and Chassigny (SNC) meteorites.
Main Results
- Martian silicate differentiation occurred over approximately 100 million years post-core formation.
- Data suggest progressive crystallization of a magma ocean.
- Prolonged solidification indicates a primitive, thick Martian atmosphere.
Conclusions
- Mars's early silicate differentiation history is constrained by meteorite analysis.
- A long-lived magma ocean points to a reduced cooling rate due to a thick early atmosphere.