Results 141 to 150 of about 102,836 (336)
The carbon chemistry of meteorites: Relationships to comets [PDF]
The carbonaceous meteorites exhibiting alteration by liquid water bear a strong relationship to comets. Not only is their elemental composition closer to solar in relative abundances than other meteorites, they are water rich; and they contain isotopic ...
Chang, S.
core +1 more source
Movement of Trace Elements During Residence in the Antarctic Ice: a Laboratory Simulation [PDF]
, 1991 Recent work has determined that differences in the trace element distribution between Antarctic eucrites and non-Antarctic eucrites may be due to weathering during residence in the ice, and samples that demonstrate trace element disturbances do not ...
Strait, Melissa M.
core +1 more source
60Fe-60Ni chronology of core formation in Mars
, 2014 The timescales of accretion, core formation, and magmatic differentiation in planetary bodies can be constrained using extinct radionuclide systems. Experiments have shown that Ni becomes more siderophile with decreasing pressure, which is reflected in ...
Dauphas, Nicolas, Tang, Haolan
core +1 more source
Experimental simulations of space weathering on pentlandite
Meteoritics &Planetary Science, EarlyView.Abstract Pentlandite (Fe, Ni)9S8 is an important accessory mineral on asteroidal surfaces. It has been identified in returned regolith samples from asteroids Itokawa, Ryugu, and Bennu. Currently, systematic studies to understand the response of this mineral phase under space weathering conditions are lacking.
L. C. Chaves +8 more
wiley +1 more source
Experimental simulation of registration of objects of space
Физика волновых процессов и радиотехнические системы, 2013 Developed a laboratory prototype onboard optical detection system of dust particles of space, space debris, meteorites, and the parameters of their motion, based on the stereoscopic effect.
E.J. Baryshev, N.D. Semkin, K.E. Voronov
doaj
Meteoritics &Planetary Science, EarlyView.Abstract Dissociated zircon is largely used as a robust indicator of glasses generated by impact cratering and airbursts. The reaction of zircon dissociation, i.e. ‘ZrSiO4 → ZrO2 + SiO2’, requires high temperatures (>1670°C) only reached by extreme geological processes. Using high‐temperature experiments, this study shows that zircon can dissociate and
A. Musolino +8 more
wiley +1 more source
Textural and minerochemical features of NWA 1807 and 2180, two new CV3 chondrites from northwest Africa [PDF]
, 2007 A textural and minerochemical study has been performed on NWA 1807 and 2180 chondrites in order to determine sizes and typologies of chondrules, relative abundances of mineral phases, compositions of main phases and bulk oxygen isotope ...
Franchi, I. A. +4 more
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