The howardite, eucrite and diogenite (HED) clan of meteorites are ultramafic and mafic
igneous rocks and impact-engendered fragmental debris derived from a thoroughly …

Abstract The 176 Lu–176 Hf radioactive decay system has been widely used to study
planetary crust–mantle differentiation. Of considerable utility in this regard is zircon, a …

Determining the origin of water and the timing of its accretion within the inner solar system is
important for understanding the dynamics of planet formation. The timing of water accretion …

The asteroid 4 Vesta is one of the very few heavenly bodies to have been linked to samples
on Earth: the howardite‐eucrite‐diogenite (HED) meteorite suite. This large and diverse …

The presence of H 2 O within differentiated terrestrial bodies in the inner Solar System is
well established; however, the source (s) of this H 2 O and the time of its arrival to the inner …

Whereas most radiometric chronometers give formation ages of individual meteorites> 4.5
Ga ago, the K–Ar chronometer rarely gives times of meteorite formation. Instead, K–Ar ages …

We report on the petrology of a new eucrite belonging to the Stannern trend and discuss the
origin of this trend. The eucrite Northwest Africa 4523 (NWA 4523) is an equilibrated eucrite …

Twenty-nine unbrecciated eucrites have been thoroughly characterized in terms of the
petrologic factors that affect their spectra, such as mineral chemistry, modal adundances …

We have performed a mineralogical and geochemical study of eight metamorphosed
basaltic eucrites. These are classified into granulitic eucrites and type 4–7 eucrites on the …

The original hydrogen isotope (D/H) ratios of different planetary bodies may indicate where
each body formed in the Solar System. However, geological and atmospheric processes can …