Formation of Venus, Earth and Mars: Constrained by Isotopes

@article{Lammer2020FormationOV,
  title={Formation of Venus, Earth and Mars: Constrained by Isotopes},
  author={Helmut Lammer and Ramon Brasser and Anders Johansen and Manuel Scherf and Martin Leitzinger},
  journal={Space Science Reviews},
  year={2020}
}
Here we discuss the current state of knowledge of terrestrial planet formation from the aspects of different planet formation models and isotopic data from Hf-W, U-Pb, lithophile-siderophile elements, Ca/Ca isotope samples from planetary building blocks, recent reproduction attempts from Ar/Ar, Ne/Ne, Ar/Ne isotope ratios in Venus’ and Earth’s atmospheres, the expected solar He abundance in Earth’s deep mantle and Earth’s D/H sea water ratios that shed light on the accretion time of the early… 

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References

SHOWING 1-10 OF 255 REFERENCES

Fast accretion of the Earth with a late Moon-forming giant impact

TLDR
A model of the 182W isotopic evolution of the accreting Earth, including constraints from partitioning of refractory siderophile elements (Ni, Co, W, V, and Nb) during core formation, which can explain the discrepancy in the timing of the Moon-forming giant impact (MGI).

The isotopic nature of the Earth’s accreting material through time

TLDR
It is shown that elements with distinct affinities for metal can be used to decipher the isotopic nature of the Earth’s accreting material through time, and indicates that the giant impactor that formed the Moon probably had an isotopic composition similar to that of theEarth, hence relaxing the constraints on models of lunar formation.

Origin and evolution of the atmospheres of early Venus, Earth and Mars

We review the origin and evolution of the atmospheres of Earth, Venus and Mars from the time when their accreting bodies were released from the protoplanetary disk a few million years after the

HF-W Chronometry and Inner Solar System Accretion Rates

Models for the mechanisms of accretion of the terrestrial planets are re-examined using the experimental technique of high-precision isotope ratio mass spectrometry of tungsten (W). The decay of

Isotopic evolution of the protoplanetary disk and the building blocks of Earth and Moon

TLDR
It is inferred that no primitive meteorite matches the terrestrial composition and the protoplanetary disk material from which Earth and the Moon accreted is therefore largely unconstrained, and that this secular evolution reflects admixing of pristine outer-Solar-System material into the thermally processed inner prot planetetary disk associated with the accretion of mass to the proto-Sun.

Iron isotope evidence for very rapid accretion and differentiation of the proto-Earth

TLDR
The results suggest a rapid accretion and differentiation of Earth during the ~5–million year disk lifetime, when the volatile-rich CI-like material is accreted to the proto-Sun via the inner disk.

Origin of Earth's water: sources and constraints

We review the state of knowledge on the origin of Earth's water. Empirical constraints come from chemical and isotopic measurements of solar system bodies and of Earth itself. Dynamical models have

The Formation of Mars: Building Blocks and Accretion Time Scale

In this review paper I address the current knowledge of the formation of Mars, focusing on its primary constituents, its formation time scale and its small mass compared to Earth and Venus. I argue
...