Early Moon formation inferred from hafnium–tungsten systematics

@article{Thiemens2019EarlyMF,
  title={Early Moon formation inferred from hafnium–tungsten systematics},
  author={Maxwell Marzban Thiemens and Peter Sprung and Ra{\'u}l O. C. Fonseca and Felipe Padilha Leitzke and Carsten M{\"u}nker},
  journal={Nature Geoscience},
  year={2019},
  pages={1-5}
}
The date of the Moon-forming impact places an important constraint on Earth’s origin. Lunar age estimates range from about 30 Myr to 200 Myr after Solar System formation. Central to this age debate is the greater abundance of 182W inferred for the silicate Moon than for the bulk silicate Earth. This compositional difference has been explained as a vestige of less late accretion to the Moon than to the Earth after core formation. Here we present high-precision trace element composition data from… Expand

Figures from this paper

A new estimate for the age of highly-siderophile element retention in the lunar mantle from late accretion
Subsequent to the Moon’s formation, late accretion to the terrestrial planets strongly modified the physical and chemical nature of silicate crusts and mantles. This alteration came in the form ofExpand
A possible high-temperature origin of the Moon and its geochemical consequences
Abstract The formation of the Moon is thought to be the result of a giant impact between a Mercury-to-proto-Earth-sized body and the proto-Earth. However, the initial thermal state of the MoonExpand
Isotopic evidence for the formation of the Moon in a canonical giant impact
TLDR
It is shown that the vanadium isotopic composition of the Moon is offset from that of the bulk silicate Earth by 0.04 parts per thousand towards the chondritic value, which implies that the impactor and proto-Earth mainly accreted from a common isotopic reservoir in the inner solar system. Expand
Evidence for Transient Atmospheres during Eruptive Outgassing on the Moon
Events following the giant impact formation of the Moon are thought to have led to volatile depletion and concurrent mass-dependent fractionation of the isotopes of moderately volatile elementsExpand
Geochemical Constraints on the Origin of the Moon and Preservation of Ancient Terrestrial Heterogeneities
The Moon forming giant impact marks the end of the main stage of Earth’s accretion and sets the stage for the subsequent evolution of our planet. The giant impact theory has been the accepted modelExpand
Formation of Venus, Earth and Mars: Constrained by isotopes
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-siderophileExpand
Impact bombardment chronology of the terrestrial planets from 4.5 Ga to 3.5 Ga
Subsequent to the Moon's formation, late accretion to the terrestrial planets modified their silicate crusts and mantles. We combine dynamical N-body and Monte Carlo simulations to determine impactExpand
The Pb isotope evolution of Bulk Silicate Earth: Constraints from its accretion and early differentiation history
Abstract Constraining the evolution of Pb isotopes in the bulk silicate Earth (BSE) is hampered due to the lack of a direct determination of Earth’s U/Pb and initial Pb isotope composition. AllExpand
No 182W evidence for early Moon formation
1Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Berlin, Germany. 2Institute für Geologische Wissenschaften, Freie Universität Berlin, Berlin, Germany. 3Institut fürExpand
Constraining the Evolutionary History of the Moon and the Inner Solar System: A Case for New Returned Lunar Samples
The Moon is the only planetary body other than the Earth for which samples have been collected in situ by humans and robotic missions and returned to Earth. Scientific investigations of the firstExpand
...
1
2
3
4
...

References

SHOWING 1-10 OF 72 REFERENCES
Tungsten isotopic evidence for disproportional late accretion to the Earth and Moon
TLDR
Characterization of the hafnium–tungsten systematics of the lunar mantle will enable better constraints on the timescale and processes involved in the currently accepted giant-impact theory for the formation and evolution of the Moon, and for testing the late-accretion hypothesis. Expand
Early formation of the Moon 4.51 billion years ago
TLDR
Data on lunar zircons indicate differentiation of the lunar crust by 4.51 billion years, indicating the formation of the Moon within the first ~60 million years after the birth of the solar system. Expand
Lunar tungsten isotopic evidence for the late veneer
TLDR
Data independently show that HSE abundances in the bulk silicate Earth were established after the giant impact and core formation, as predicted by the late veneer hypothesis and constitutes a challenge to current models of lunar origin. Expand
Tungsten isotopes and the origin of the Moon
Abstract The giant impact model of lunar origin predicts that the Moon mainly consists of impactor material. As a result, the Moon is expected to be isotopically distinct from the Earth, but it isExpand
Lead isotope evidence for a young formation age of the Earth–Moon system
Abstract A model of a giant impact between two planetary bodies is widely accepted to account for the Earth–Moon system. Despite the importance of this event for understanding early Earth evolutionExpand
The W isotope evolution of the bulk silicate Earth: constraints on the timing and mechanisms of core formation and accretion
The W isotope composition of the bulk silicate Earth exhibits a small but resolvable excess in the abundance of 182W relative to that found in chondrites, indicating that core formation in Earth tookExpand
Highly siderophile elements in Earth’s mantle as a clock for the Moon-forming impact
TLDR
A large number of N-body simulations are used to demonstrate a relationship between the time of the last giant impact on an Earth-like planet and the amount of mass subsequently added during the era known as Late Accretion, and the concentration of highly siderophile elements in Earth’s mantle constrains the mass of chondritic material added to Earth during LateAccretion. Expand
Geochemical arguments for an Earth-like Moon-forming impactor
TLDR
An inversion method is presented to calculate the Hf/W ratios and ϵ182W values of the proto-Earth and impactor mantles for a given Moon-forming impact scenario. Expand
Lunar core formation: New constraints from metal–silicate partitioning of siderophile elements
Abstract Analyses of Apollo era seismograms, lunar laser ranging data and the lunar moment of inertia suggest the presence of a small, at least partially molten Fe-rich metallic core in the Moon, butExpand
Isotopic evidence for chondritic Lu/Hf and Sm/Nd of the Moon
Abstract Refractory lithophile elements are generally considered to occur in chondritic relative abundances in terrestrial planets. This assumption forms the basis for using isotope systems such asExpand
...
1
2
3
4
5
...