The Accretion, Composition and Early Differentiation of Mars

  title={The Accretion, Composition and Early Differentiation of Mars},
  author={Alex N. Halliday and Heinrich W{\"a}nke and J-L. Birck and Robert Norman Clayton},
  journal={Space Science Reviews},
The early development of Mars is of enormous interest, not just in its own right, but also because it provides unique insights into the earliest history of the Earth, a planet whose origins have been all but obliterated. Mars is not as depleted in moderately volatile elements as are other terrestrial planets. Judging by the data for Martian meteorites it has Rb/Sr ≈ 0.07 and K/U ≈ 19,000, both of which are roughly twice as high as the values for the Earth. The mantle of Mars is also twice as… 
The Origin and Earliest History of the Earth
Core Formation and Mantle Differentiation on Mars
Geochemical investigation of Martian meteorites (SNC meteorites) yields important constraints on the chemical and geodynamical evolution of Mars. These samples may not be representative of the whole
The composition of Mars
2.10 – Mars
The rates of accretion, core formation and volatile loss in the early Solar System
Nuclides with half–lives of 105–108 yr permit the elucidation of nebula time–scales and the rates of accretion of planetesimals. However, the 182Hf–182W system with a half–life of 9_2 Myr also
4. Building of a Habitable Planet
Except the old Jack Hills zircon crystals, it does not exit direct record of the first 500 Ma of the Earth history. Consequently, the succession of events that took place during this period is only
Elemental Composition of the Martian Crust
Spacecraft data suggest that martian meteorites are not representative of older, more voluminous crust and prompt questions about their use in defining diagnostic geochemical characteristics and in constraining mantle compositional models for Mars.
Water and the evolutionary geological history of Mars
Mars and Earth are the only two planets known to have long histories of dynamical cycling of water through their atmosphere, lithosphere, and cryosphere. Although we have known for thirty years that


Chemical composition and accretion history of terrestrial planets
  • H. Wänke, G. Dreibus
  • Geology, Physics
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1988
The high concentrations of moderately siderophile elements (Ni, Co, etc.) in the Earth’s mantle and the similarity of their Cl normalized abundances to those of moderately volatile elements (F, Na,
Constitution of terrestrial planets
  • H. Wänke
  • Geology, Physics
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1981
Reliable estimates of the bulk composition are so far restricted to the three planetary objects from which we have samples for laboratory investigation, i.e. the Earth, the Moon and the eucrite
Formation, history and energetics of cores in the terrestrial planets
Chemistry and accretion history of Mars
  • H. Wänke, G. Dreibus
  • Geology
    Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences
  • 1994
Using element correlations observed in SNC meteorites and general cosmochemical constraints, Wänke & Dreibus (1988) have estimated the bulk composition of Mars. The mean abundance value for
Volatiles on Earth and Mars: A comparison
Earth and Mars: Water inventories as clues to accretional histories
Core formation on Mars and differentiated asteroids
Meteorite chronometry based on the 182Hf–182W system can provide powerful constraints on the timing of planetary accretion and differentiation, although the full potential of this method has yet to
Core Formation in Earth's Moon, Mars, and Vesta
Stimulated by new experimental results on metal/silicate partitioning of elements at elevated temperatures and pressures, we have revisited the question of core formation in Earth's Moon, Mars, and