Molybdenum isotopic evidence for the late accretion of outer Solar System material to Earth

@article{Budde2019MolybdenumIE,
  title={Molybdenum isotopic evidence for the late accretion of outer Solar System material to Earth},
  author={Gerrit Budde and Christoph Burkhardt and Thorsten Kleine},
  journal={Nature Astronomy},
  year={2019},
  pages={1-6}
}
Earth grew through collisions with Moon-sized to Mars-sized planetary embryos from the inner Solar System, but it also accreted material from greater heliocentric distances1,2, including carbonaceous chondrite-like bodies, the likely source of Earth’s water and highly volatile species3,4. Understanding when and how this material was added to Earth is critical for constraining the dynamics of terrestrial planet formation and the fundamental processes by which Earth became habitable. However… Expand
Nickel isotopic evidence for late-stage accretion of Mercury-like differentiated planetary embryos
TLDR
It is proposed that a highly reduced sulfide-rich, Mercury-like body collided with and merged into the proto-Earth during the Moon-forming giant impact, producing the sub-chondritic Ni isotopic signature of the BSE, while delivering sulfur and probably other volatiles to the Earth. Expand
Isotopic constraints on the origin and nature of primitive material in the Solar System and on early Earth
The Earth formed some 4.5 Ga from the accumulation of dust, rocks and gas. The composition of these primitive materials is today recorded in meteorites. However, the origin of volatile elementsExpand
Ru isotope vestige of Earth’s pre-late veneer mantle preserved in Archean rocks
TLDR
Ruthenium isotope compositions of the oldest preserved mantle rocks from Greenland imply that volatile-rich outer Solar System material was not delivered to Earth until very late in the planet’s formation. Expand
Heterogeneous accretion of Earth inferred from Mo-Ru isotope systematics
Abstract The Mo and Ru isotopic compositions of meteorites and the bulk silicate Earth (BSE) hold important clues about the provenance of Earth's building material. Prior studies have argued thatExpand
Earth’s water may have been inherited from material similar to enstatite chondrite meteorites
TLDR
It is shown that EC meteorites contain sufficient hydrogen to have delivered to Earth at least three times the mass of water in its oceans, which would require Earth's water to be from a different source, such as comets. Expand
Accretion of the Earth—Missing Components?
Primitive meteorites preserve the chemical and isotopic composition of the first aggregates that formed from dust and gas in the solar nebula during the earliest stages of solar system evolution.Expand
Accretion and differentiation of early planetary bodies as recorded in the composition of the silicate Earth
Abstract The abundances of the chemical elements and radiogenic isotopes in the silicate Earth provide key information on the composition of planetary building blocks, the accretion process,Expand
A unified model for hydrogen in the Earth and Moon: No one expects the Theia contribution
Abstract The Moon is thought to have formed after a planetary embryo, known as Theia, collided with the proto-Earth 4.5 billion years ago. This so-called Giant Impact was the last major event duringExpand
Isotopic Evolution of the Inner Solar System Inferred from Molybdenum Isotopes in Meteorites
The fundamentally different isotopic compositions of non-carbonaceous (NC) and carbonaceous (CC) meteorites reveal the presence of two distinct reservoirs in the solar protoplanetary disk that wereExpand
Constraints on Chondrule Generation, Disk Dynamics, and Asteroid Accretion from the Compositions of Carbonaceous Meteorites
The elemental and isotopic compositions of meteorites are expected to reflect several key processes that occurred in the early solar system, including the migration of gas and dust throughout theExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 38 REFERENCES
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. Expand
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. Expand
Ruthenium isotopic evidence for an inner Solar System origin of the late veneer
TLDR
It is shown that all chondrites, including carbonaceous chondrite-like asteroids or comets, have Ru isotopic compositions distinct from that of the Earth’s mantle, implying that the late veneer was not the primary source of volatiles and water on the Earth. Expand
Molybdenum isotope anomalies in meteorites: Constraints on solar nebula evolution and origin of the Earth
The early evolution of the solar nebula involved substantial transport of mass, resulting in mixing and homogenization of isotopically diverse materials that were contributed to the solar system fromExpand
The osmium isotopic composition of the Earth's primitive upper mantle
THE elevated abundances of highly siderophile elements in the Earth's mantle, relative to what would be predicted from metal–silicate equilibrium, have often been cited as evidence for the accretionExpand
The Provenances of Asteroids, and Their Contributions to the Volatile Inventories of the Terrestrial Planets
TLDR
Hydrogen isotopic analysis of primitive meteorites implicates asteroids as early sources of Earth’s water and argues against an influx of water ice from the outer solar system, which has been invoked to explain the nonsolar oxygen isotopic composition of the inner solar system. Expand
The cosmic molybdenum-neodymium isotope correlation and the building material of the Earth
doi: 10.7185/geochemlet.1720 The isotopic similarity of enstatite chondrites and Earth has often been cited as evidence that the Earth is made of enstatite chondrite-like material. Here we show,Expand
Age of Jupiter inferred from the distinct genetics and formation times of meteorites
TLDR
Jupiter is the oldest planet of the Solar System, and its solid core formed well before the solar nebula gas dissipated, consistent with the core accretion model for giant planet formation. Expand
Highly siderophile elements in the Earth, Moon and Mars: Update and implications for planetary accretion and differentiation
Abstract The highly siderophile elements (HSE) pose a challenge for planetary geochemistry. They are normally strongly partitioned into metal relative to silicate. Consequently, planetary coreExpand
Volatile accretion history of the terrestrial planets and dynamic implications
TLDR
Evidence is examined for the hypothesis that the Moon and the Earth were essentially dry immediately after the formation of the Moon—by a giant impact on the proto-Earth—and only much later gained volatiles through accretion of wet material delivered from beyond the asteroid belt. Expand
...
1
2
3
4
...