10 Result(s)
within
Frederic Moynier
English
Science, Humanities and Social Sciences, multidisciplinary
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Article
Open AccessPotassium isotope heterogeneity in the early Solar System controlled by extensive evaporation and partial recondensation
Volatiles are vital ingredients for a habitable planet. Angrite meteorites sample the most volatile-depleted planetesimal in the Solar System, particularly for the alkali elements. They are prime targets for i...
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Open AccessCalcium isotope evidence for early Archaean carbonates and subduction of oceanic crust
Continents are unique to Earth and played a role in coevolution of the atmosphere, hydrosphere, and biosphere. Debate exists, however, regarding continent formation and the onset of subduction-driven plate tec...
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Article
Open AccessSerum and brain natural copper stable isotopes in a mouse model of Alzheimer’s disease
Alzheimer’s disease is associated with the production of Cu rich aβ fibrils. Because monitoring the changes in Cu level of organs has been proposed to follow the evolution of the disease, we analyzed the coppe...
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Article
Open AccessMartian magmatism from plume metasomatized mantle
Direct analysis of the composition of Mars is possible through delivery of meteorites to Earth. Martian meteorites include ∼165 to 2400 Ma shergottites, originating from depleted to enriched mantle sources, an...
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Evidence for extremely rapid magma ocean crystallization and crust formation on Mars
The formation of a primordial crust is a critical step in the evolution of terrestrial planets but the timing of this process is poorly understood. The mineral zircon is a powerful tool for constraining crust ...
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Open AccessZhamanshin astrobleme provides evidence for carbonaceous chondrite and post-impact exchange between ejecta and Earth’s atmosphere
Chemical fingerprints of impacts are usually compromised by extreme conditions in the impact plume, and the contribution of projectile matter to impactites does not often exceed a fraction of per cent. Here we...
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Article
Open AccessTheoretical isotopic fractionation of magnesium between chlorophylls
Magnesium is the metal at the center of all types of chlorophyll and is thus crucial to photosynthesis. When an element is involved in a biosynthetic pathway its isotopes are fractionated based on the differen...
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Open AccessCalcium isotope fractionation between aqueous compounds relevant to low-temperature geochemistry, biology and medicine
Stable Ca isotopes are fractionated between bones, urine and blood of animals and between soils, roots and leaves of plants by >1000 ppm for the 44Ca/40Ca ratio. These isotopic variations have important implicati...
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Open AccessExtensive volatile loss during formation and differentiation of the Moon
Low estimated lunar volatile contents, compared with Earth, are a fundamental observation for Earth–Moon system formation and lunar evolution. Here we present zinc isotope and abundance data for lunar crustal ...
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Zinc isotopic evidence for the origin of the Moon
Lunar magmatic rocks are shown to be enriched in the heavy isotopes of zinc and to have lower zinc concentrations than terrestrial or Martian igneous rocks; these variations represent the large-scale evaporati...
