Results 41 to 50 of about 104,611 (276)
Terrestrial exposure of a fresh Martian meteorite causes rapid changes in hydrogen isotopes and water concentrations [PDF]
, 2018 Determining the hydrogen isotopic compositions and H2O contents of meteorites and their components is important for addressing key cosmochemical questions about the abundance and source(s) of water in planetary bodies.
A Al-Kathiri +30 more
core +1 more source
Parauapebas meteorite from Pará, Brazil, a “hammer” breccia chondrite
Brazilian Journal of Geology, 2020 The Parauapebas meteorite, third official meteorite discovered in the Brazilian Amazon region, is a “hammer meteorite” which fell on December 9th, 2013, in the city of Parauapebas, Pará State, Brazil.
Daniel Atencio +5 more
doaj +1 more source
Rock and Soil Mechanics, 2022 In the future, the extraterrestrial human activities, such as resources exploitation and base construction beyond the Earth need the aid of geotechnical engineering technology.
TANG Xu-hai +6 more
doaj +1 more source
Silica-rich volcanism in the early solar system dated at 4.565 Ga
Nature Communications, 2018 Achondritic meteorites can record volcanism and crust formation on planetesimals in the early Solar System. Here, the authors date the Northwest Africa 11119 meteorite with an Al-Mg age of 4564.8 ± 0.3 Ma indicating that this is the earliest evidence of ...
Poorna Srinivasan +7 more
doaj +1 more source
Evaluation of Geomorphological Evidences for Possible Impact Crater of Zirouki in Sistan and Baluchestan, SE Iran [PDF]
مخاطرات محیط طبیعی, 2014 Despite the extensive studies on geomorphological phenomena in Iran, since investigation of meteorite impact craters h not been considered. Based on both remote sensing technique and field work we have recognized the circular structure of Zirouki crater ...
Mohammadreza Mansouri Daneshvar +1 more
doaj +1 more source
Thermal Alteration of Labile Elements in Carbonaceous Chondrites
, 2018 Carbonaceous chondrite meteorites are some of the oldest Solar System planetary materials available for study. The CI group has bulk abundances of elements similar to those of the solar photosphere.
Andronikov, Alexandre +6 more
core +1 more source
Emergent Chemical Reactivity and Complexity of RNA Condensates
Angewandte Chemie International Edition, EarlyView.RNA condensates capable of substrate enrichment and catalysis modulate their environment. Could this start a catalytic selection loop or evolution? Abstract The RNA world hypothesis posits the existence of life‐like assemblies that consisted mostly of RNA.
Samuel Hauf +4 more
wiley +1 more source
Mineralogy and Surface Composition of Asteroids
, 2015 Methods to constrain the surface mineralogy of asteroids have seen considerable development during the last decade with advancement in laboratory spectral calibrations and validation of our interpretive methodologies by spacecraft rendezvous missions ...
Burbine, Thomas H. +4 more
core +1 more source
Astronomische Nachrichten, EarlyView.ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley +1 more source
Trace element composition of troilite, iron and iron-nickel metall from meteorite Chelyabinsk
Литосфера, 2015 We studied the contents of trace elements in troilite, iron and in iron-nickel metal from meteorite Chelyabinsk by means of LA-ICP-MS. The features of the distribution of siderophile and chalcophile elements in sulfide and metallic phase in gray and ...
S. Yu. Stepanov, S. V. Berzin
doaj +2 more sources