Mercury's Crustal Thickness Correlates With Lateral Variations in Mantle Melt Production

@article{Beuthe2020MercurysCT,
  title={Mercury's Crustal Thickness Correlates With Lateral Variations in Mantle Melt Production},
  author={Mikael Beuthe and Bernard Charlier and Olivier Namur and Attilio Rivoldini and Tim Van Hoolst},
  journal={Geophysical Research Letters},
  year={2020},
  volume={47}
}
Over the first billion years of Mercury's history, mantle melting and surface volcanism produced a secondary magmatic crust varying spatially in composition and mineralogy. By combining geochemical mapping from MESSENGER with laboratory experiments on partial melting, we translate the surface mineralogy into lateral variations of surface density and calculate the degree of mantle melting required to produce surface rocks. If lateral density variations extend through the whole crust, the local… 

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References

SHOWING 1-10 OF 76 REFERENCES

Impact-induced changes in source depth and volume of magmatism on Mercury and their observational signatures

TLDR
The authors numerically model the formation of post-impact melt sheets and find that mantle convection was weak at around 3.7–3.8 Ga and that the melt sheets of Caloris and Rembrandt may contain partial melting of pristine mantle material.

Insulation and depletion due to thickened crust: Effects on melt production on Mars and Earth

The growth of thickened crustal units both depletes the mantle of heat producing elements, and thermally insulates it. These effects either cool or heat the mantle, respectively, and play an

Global correlations of ocean ridge basalt chemistry with axial depth and crustal thickness

Regional averages of the major element chemistry of ocean ridge basalts, corrected for low-pressure fractionation, correlate with regional averages of axial depth for the global system of ocean

A thin, dense crust for Mercury

Thermal evolution of Mercury as constrained by MESSENGER observations

Orbital observations of Mercury by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft provide new constraints on that planet's thermal and interior evolution.

Evaluating an impact origin for Mercury's high‐magnesium region

During its four years in orbit around Mercury, the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft's X‐ray Spectrometer revealed a large geochemical terrane in

Calculation of Peridotite Partial Melting from Thermodynamic Models of Minerals and Melts, IV. Adiabatic Decompression and the Composition and Mean Properties of Mid-ocean Ridge Basalts

Composition, mean pressure, mean melt fraction, and crustal thickness of model mid-ocean ridge basalts (MORBs) are calculated using MELTS. Polybaric, isentropic batch and fractional melts from ranges

Magnesium-rich crustal compositions on Mercury: Implications for magmatism from petrologic modeling

[1] We have conducted petrologic modeling of MESSENGER-derived compositions and analog compositions to gain a better understanding of the petrogenesis of the crust of Mercury. Analog compositions

Flood Volcanism in the Northern High Latitudes of Mercury Revealed by MESSENGER

MESSENGER observations of Mercury’s high northern latitudes reveal a contiguous area of volcanic smooth plains covering more than ~6% of the surface that were emplaced in a flood lava mode,
...