نتایج جستجو برای: Meteorite
تعداد نتایج: 2201 فیلتر نتایج به سال:
Lut 009 meteorite was found during a trip to Lut Desert of Iran in March,2012, at 30°20.38' N, 59°09.04' E. Chemical compositions of equilibrated olivine (Fa19.3 ± 0.5) and orthopyroxene (Fs16.7 ± 0.6) show that the meteorite sample belongs to H group of ordinary chondrites, while the texture (chondrule petrography and plagioclase size) suggests a petrologic type of 4. The Lut 009 has been very...
lut 009 meteorite was found during a trip to lut desert of iran in march,2012, at 30°20.38' n, 59°09.04' e. chemical compositions of equilibrated olivine (fa19.3 ± 0.5) and orthopyroxene (fs16.7 ± 0.6) show that the meteorite sample belongs to h group of ordinary chondrites, while the texture (chondrule petrography and plagioclase size) suggests a petrologic type of 4. the lut 009 has...
A new type of carbonaceous chondrite, the Tagish Lake meteorite, exhibits a reflectance spectrum similar to spectra observed from the D-type asteroids, which are relatively abundant in the outer solar system beyond the main asteroid belt and have been inferred to be more primitive than any known meteorite. Until the Tagish Lake fall, these asteroids had no analog in the meteorite collections. T...
A meteorite fall took place on September 21, 2013 in a tiny village called Vicência (also known as Vila da Borracha), located at Brazil’s northeast region, more specifically on the northwest of Pernambuco State. The meteorite almost struck a man (Mr. Adeildo) who noticed that one of the rock sides was still warm. The meteorite is now at the Rio de Janeiro National Museum for petrological classi...
A team of scientists from the United States, United Kingdom and the Netherlands have determined that chemicals in a meteorite that form the building blocks of DNA and RNA had formed before the meteorite fell to Earth. In a paper published in Earth and Planetary Science Letters on June 15, the team documents an examination of molecules found in the Murchison meteorite, fragments of which landed ...
In the abstracts of the 44th Annual Meeting of the Meteoritical Society a new stony-iron meteorite found at Penwell near Odessa, Ector County, Texas was reported. This meteorite was characterized by a high concentration of cliftonite graphite. Additional study of this meteorite shows that the non-metallic phases are similar to those found in silicate inclusions of the Odessa iron meteorite. Tab...
Microcrystals of coesite and stishovite were discovered as inclusions in amorphous silica grains in shocked melt pockets of a lunar meteorite Asuka-881757 by micro-Raman spectrometry, scanning electron microscopy, electron back-scatter diffraction, and transmission electron microscopy. These high-pressure polymorphs of SiO(2) in amorphous silica indicate that the meteorite experienced an equili...
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