Meteorite studies
نویسنده
چکیده
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 potential for providing unique information on ice-sheet dynamics. Techniques used for studying extraterrestrial materials are applicable to studies of terrestrial geologic samples, and our analytical capabilities at Purdue have dual purposes. Our research activities involve the acquisition and genetic interpretation of chemical compositional data particularly at trace or ultratrace levels in rocks and other natural materials. Trace elements are especially valuable since a small absolute compositional change produced by some force is magnified into a large relative change.
منابع مشابه
Lut 009, an H4 (S2, W4) ordinary chondrite meteorite from Lut Desert of Iran
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...
متن کاملTagish Lake -- A Meteorite from the Far Reaches of the Asteroid Belt
Written by David W. Mittlefehldt NASA, Johnson Space Center Pieces of a 56-metric-ton meteorite rained down over a wide area of Canada on January 18, 2000. Many pieces landed on the frozen Tagish Lake, allowing scientists to recover numerous samples, and giving the meteorite its name. Studies show that the meteorite is intermediate in composition between the two most primitive groups of chondri...
متن کاملA contamination assessment of the CI carbonaceous meteorite Orgueil using a DNAdirected approach
The Orgueil meteorite has become one of the most well-studied carbonaceous meteorites, after it fell in France 150 yr ago. Extraterrestrial organic compounds such as amino acids and nucleobases in the parts per billion ranges were identified in Orgueil samples with supporting isotopic analyses. However, speculations of terrestrial contamination such as organic inclusions in the form of microbes...
متن کاملIdentifying Asteroidal Ordinary Chondrite Assemblages and Petrographic Types from Vnir Spectra
Introduction: Because of a poor understanding of the delivery mechanisms of meteoroids from the asteroid belt, early asteroid spectral investigations often assumed that the abundance of various meteorite types among meteorite falls was approximately proportional to the abundance of such assemblages within the asteroid population. Based on that assumption, it was concluded that a large fraction ...
متن کاملDetermination of Soil Moisture Content at Bukit Bunuh Meteorite Impacted Area using Resistivity Method and Laboratory Test
Determination of soil moisture content is of vital importance to many fields of study; civil engineering, hydrology, agriculture, geology, ecology and forestry. The occurrence of impact crater in Bukit Bunuh, a meteorite impacted area, made it an area of great interest to many researchers. In view of the process of impact cratering, the subsurface soil characteristics such as moisture content o...
متن کاملMagnetic Susceptibility of Stony Meteorites from the National Meteorite
Introduction: There has been recent interest in using magnetic susceptiblity to characterize and classify meteorites [1,2]. Measurements of magnetic susceptibility represent a fast, non-destructive and systematic way to categorize the rapidly expanding inventory of stony meteorites being discovered on Earth. Previous studies [1,2] have demonstrated that although magnetic susceptibility varies o...
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