منابع مشابه
Meteorite studies
eteorites yield a wealth of information concerning Solar System origin, geochemical evolution of primitive parent objects, and irradiation histories of material in space. Since the numerous (approximately 16,000) antarctic meteorites include many of rare or unique types, current extraterrestrial materials research attention focuses on this population. Antarctic meteorites also have the potentia...
متن کاملMartian meteorite Dhofar 019: A new shergottite
1Planetary Geosciences Institute, Department of Geological Sciences, University of Tennessee, Knoxville, Tennessee 37996-1410, USA 2Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygin St. 19, Moscow 117975, Russia 3Institute of Meteoritics, University of New Mexico, Albuquerque, New Mexico 87131, USA 4Department of Civil Engineering and Geological ...
متن کاملSodium-22 from Supernovae: a Meteorite Connection
There are several meteoritic noble gas components whose isotopic abundances are distinctly different from the solar abundance. One of these components, Ne-E(L), is a 22Ne-rich component carried by presolar graphite. Neon-22 is dominantly from the radiogenic decay of 22Na (T1/2 = 2.6 a), but it also contains 22Ne produced by 14N(α, γ )18F(e+ν)18O(α, γ )22Ne. The proportions of 22Ne from the two ...
متن کاملFossil diatoms in a new carbonaceous meteorite
We report the discovery for the first time of diatom frustules in a carbonaceous meteorite that fell in the North Central Province of Sri Lanka on 29 December 2012. Contamination is excluded by the circumstance that the elemental abundances within the structures match closely with those of the surrounding matrix. There is also evidence of structures morphologically similar to red rain cells tha...
متن کاملFirst Report of a Shatter - Coned Meteorite
Shatter Cones; history and significance: A distinct, striated conical rock failure occurs at many terrestrial impact structures. Conical limestone fragments with radiating surface grooves were first reported by Branco and Frass [1] at Steinheim Basin, Germany in 1905. They ascribed the 4 km wide depression to deeply buried explosive magma which failed to reach the surface during a ‘crypto volca...
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ژورنال
عنوان ژورنال: Science
سال: 1888
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-11.266.119