Results 51 to 60 of about 1,707 (189)
Meteoritics &Planetary Science, EarlyView.Abstract Mechanisms for metal core formation in rocky planetesimals and planetary embryos remain poorly constrained, in part due to complexities arising from immiscibility in core‐forming liquids at low pressures. To assess the pressure dependence of immiscibility and its role in protoplanetary differentiation, we performed experiments at 3 and 5 GPa ...
Geoffrey David Bromiley +2 more
wiley +1 more source
Reduced and unstratified crust in CV chondrite parent body
Nature Communications, 2017 Meteorites may unlock the history of the early solar system. Here, the authors find, through Ca-Fe-rich secondary phases, that the distinction between reduced and oxidized CV chondrites is invalid; therefore, CV3 chondrites are asteroid fragments that ...
Clément Ganino, Guy Libourel
doaj +1 more source
Looking for the origin of life in cosmochemistry: Asteroids and their carbon-rich meteorites
Mètode Science Studies Journal: Annual Review, 2016 Carbonaceous chondrite meteorites are carbon-containing fragments of primitive asteroids that have offered the only samples available to date giving insights into chemical evolution in laboratory analyses.
Sandra Pizzarello
doaj +1 more source
The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)
Sedimentology, EarlyView.ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti +5 more
wiley +1 more source
Testing the Bus–DeMeo Asteroid Taxonomy Using Meteorite Spectra
The Planetary Science JournalThe most widely used method to spectrally classify asteroids is the Bus–DeMeo taxonomy. To test how well the Bus–DeMeo taxonomy groups asteroids on the basis of their mineralogy, we have classified ∼1500 meteorite spectra using this Bus–DeMeo system ...
Thomas H. Burbine +5 more
doaj +1 more source
Earth, Planets and Space, 2018 We measured the abundances of Sr and rare earth elements (REEs) in the matrices of five CV3 carbonaceous chondrites: Meteorite Hills (MET) 00430, MET 01070, La Paz ice field (LAP) 02206, Asuka (A) 881317 and Roberts Massif (RBT) 04143.
Kaori Jogo +4 more
doaj +1 more source
Life, 2019 This study is a multi-technique investigation of the Paris carbonaceous chondrite directly applied on two selected 500 × 500 µm² areas of a millimetric fragment, without any chemical extraction.
Manale Noun +10 more
doaj +1 more source
Early planetesimal differentiation and late accretion shaped Earth’s nitrogen budget
Nature CommunicationsThe relative roles of protoplanetary differentiation versus late accretion in establishing Earth’s life-essential volatile element inventory are being hotly debated.
Wenzhong Wang +3 more
doaj +1 more source
Photometric Analysis of Asteroids in the Phocaea Region
The Astronomical JournalThe Phocaea asteroid family, one of the large ancient families located in the inner main belt, may be the sources of near-Earth asteroids (NEAs) due to the nearby 3:1 mean motion resonance with Jupiter, the ν 6 secular resonance, and the Yarkovsky and ...
Xiaoyun Xu +9 more
doaj +1 more source
Structure of the chondrules and the chemical composition of olivine in meteorite Jesenice
Geologija, 2013 This paper presents a mineralogical analysis of various chondrule types and chemical analysis of olivine indifferent parts of meteorite Jesenice. Quantitative energy-dispersive X-ray spectroscopy with a scanning electronmicroscope was used in the ...
Bojan Ambrožič +3 more
doaj +1 more source