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Topic: Lunar meteorite


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In the News (Wed 15 Feb 12)

  
  Lunar meteorite - Wikipedia, the free encyclopedia
A Lunar meteorite is a meteorite that is known to have originated on the Moon.
Lunar origin may be established by comparing the mineralogy, the chemical composition, and the isotopic composition between meteorites and samples from the Moon collected by Apollo missions.
For statistical reasons, the composition of lunar meteorites is closer to the average composition of the lunar surface material than the composition of the samples from Apollo and Luna missions.
en.wikipedia.org /wiki/Lunar_meteorite   (668 words)

  
 Lunar Meteorites   (Site not responding. Last check: 2007-10-20)
Lunar meteorites that are mare basalts (e.g., NWA 032) or breccias composed mainly of mare material (EET 87521/96008) are poor in aluminum and rich in iron.
Some "mingled" lunar meteorites (e.g., QUE 94281) apparently derive from a boundary between the maria and the highlands because they are breccias consisting of clasts of both mare and highlands rocks.
Lunar Prospector mission (1998—99) have shown that all of the Apollo sites were in or near a unique and anomalously radioactive “hot spot” on the lunar nearside in the vicinity of Mare Imbrium.
epsc.wustl.edu /admin/resources/moon_meteorites.html   (4033 words)

  
 Meteorite Stamps and Coins
One of the minerals, identified as "fer natif" (native iron) appears to be an etched slice of an iron meteorite displaying its Widmanstatten pattern.
The first sheet (left) depicts a Martian meteorite from India (presumably Shergotty), a Martian meteorite from Nigeria (presumably Zagami), a Howardite from the United States (five are known), the iron meteorite Mundrabilla from Australia, and a mesosiderite from Poland (presumably Lowicz).
The Peekskill meteorite may be the first fireball to be both recorded on videotape and have fragments recovered.
www.pibburns.com /catastro/metstamp.htm   (8148 words)

  
 Encyclopedia: Meteorite   (Site not responding. Last check: 2007-10-20)
Meteorite, meteor that reaches the surface of Earth or of another planet before it is entirely consumed.
Meteorites found on Earth are classified into types, depending on their composition: irons, those composed chiefly of iron, a small percentage of nickel, and traces of other metals such as cobalt; stones, stony meteors consisting of silicates; and stony irons, containing varying proportions of both iron and stone.
Although most meteorites are now believed to be fragments of either asteroids or comets, recent geochemical studies have shown that a few Antarctic stones came from the Moon and Mars, from which they presumably were ejected by the explosive impact of asteroids.
www.nationmaster.com /encyclopedia/Meteorite   (449 words)

  
 Lunar meteorite   (Site not responding. Last check: 2007-10-20)
By comparing the mineralogy, thechemical composition, and the isotopic composition between lunar meteorites and samples from the Moon collected by Apollo missions, origin from the Moon is ascertained.
For statistical reasons, the composition of lunar meteorites is closer to the average composition of the lunarsurface material than the composition of the samples from Apollo and Luna missions.
When the first meteorite from moon was discovered in 1982 this led to new speculations that there could also exist meteoritesfrom Mars.
www.therfcc.org /lunar-meteorite-33521.html   (244 words)

  
 Lunar meteorite   (Site not responding. Last check: 2007-10-20)
The first lunar meteorite was discovered in 1979 in Antarctica and is named Yamato 791197 but at that time it was known that this is a meteorite from The first meteorite for which a lunar was shown was the meteorite Allan Hills 81005 which was found in 1981 [1].
Until now no single crater be identified as the origin of lunar For statistical reasons the composition of lunar is closer to the average composition of lunar surface material than the composition of samples from Apollo and Luna missions.
When the first meteorite from moon was in 1982 this led to new speculations there could also exist meteorites from Mars.
www.freeglossary.com /Lunar_meteorite   (501 words)

  
 PSRD:: SaU169 Lunar Meteorite   (Site not responding. Last check: 2007-10-20)
The meteorite was involved in a subsequent impact 2.8 billion years ago, then another 200 million years ago, and a relatively recent one no more than 340 thousand years ago.
Edwin Gnos and his colleagues think they might have figured out the location of one of the lunar meteorites on the basis of its history as revealed by the record of impact events in it and its chemical composition.
The whole question of the style of early lunar bombardment is important as it describes what the environment was like on the early Earth, at the time when life was originating.
www.psrd.hawaii.edu /Oct04/SaU169.html   (3212 words)

  
 PSRD Hot Idea: Lunar meteorites and the lunar cataclysm   (Site not responding. Last check: 2007-10-20)
Some of these meteorites are regolith breccias, formed when a chunk of regolith (the "soil," including all the rock fragments in it) is compressed into a single rock.
The meteorites, on the other hand, are very low in K and P. Although no one knows exactly where on the Moon any of these meteorites come from, they don't come from the same place as the Apollo and Luna samples.
In testing the Lunar Cataclysm, we expected that if impact melt older than 3.9 billion years existed and was abundant on the Moon's surface, it was probable that we would find a piece of it among the four meteorites.
www.psrd.hawaii.edu /Jan01/lunarCataclysm.html   (2202 words)

  
 UNM Today: UNM researchers identify youngest lunar meteorite
The meteorite, found in Africa in 2000, was examined by a group of scientists in the Earth and Planetary Sciences department headed by Senior Research Scientist Lars Borg.
NWA 773 is a 633-gram lunar meteorite composed of impact breccia containing an olivine-rich clast.
The bulk of the clast sample was composed of olivine (48 percent) interpreted to be of igneous origin.
www.unm.edu /~market/cgi-bin/archives/000437.html   (455 words)

  
 Lunar Meteorites
Since impact craters occur at random locations, lunar meteorites provide a set of samples from all portions of the Moon, including the farside and polar regions, which Apollo astronauts and Luna spacecraft were unable to visit.
The numbers in the name of the meteorite indicate it was found in 1988 (88) and that it was sample number 105 in the expeditions collection.
Some lunar meteorites come from the vast plains of basalt, or maria, on the Moon, which are the dark gray areas one can see on the surface.
www.lpl.arizona.edu /SIC/moon/lunar_meteorites   (700 words)

  
 Geological Society - News - Lunar meteorite ages strongly support 'lunar cataclysm'   (Site not responding. Last check: 2007-10-20)
Lunar meteorite ages present new, strong evidence for the bombardment of the moon just as life was beginning on Earth.
Barbara Cohen of the University of Tennessee -- Knoxville analysed the lunar meteorite ages for her dissertation research at the University of Arizona in Tucson.
They find from the ages of the clasts (melted rock fragments) in the breccia meteorites that the entire moon was bombarded 3.9 billion years ago, a true global lunar cataclysm.
www.geolsoc.org.uk /template.cfm?name=Moon3   (685 words)

  
 Observatory Acquires Unique Lunar Meteorite   (Site not responding. Last check: 2007-10-20)
While the meteorite is small -- weighing a half-gram and about the size of a thumbnail -- it's nevertheless a valuable piece to own because until last year no lunar meteorite was owned privately, much less offered for sale.
Alexander described that meteorite as a "moderately unusual stony iron meteorite, about 50 percent metal and 50 percent crystals of rock" unsuitable for display because it hadn't been properly cut.
WSU's lunar meteorite is primarily dark gray in appearance with lighter flecks, a result of it being a mixture of the moon's "lowlands" and "highlands." Alexander described the lowlands as the darker, lava-filled areas of the moon, while the highlands are the lighter areas of the moon that were never covered by lava.
webs.wichita.edu /lapo/meteor/moometeo.htm   (756 words)

  
 ALHA 81005 - Lunar Meteorite   (Site not responding. Last check: 2007-10-20)
Delano J. Constraints on the highlands source-area of lunar meteorite ALHA 81005 using chemical compositions of glasses (abstract).
Desnoyers C. and Michel-Lévy M. The olivine in the lunar meteorite ALHA 81005 (abstract).
(2005) A magnesian granulite clast in lunar meteorite ALHA81005 (abstract).
epsc.wustl.edu /admin/resources/meteorites/alha81005.html   (867 words)

  
 Lunar Meteorite Ages Strongly Support Lunar Cataclysm
Whether or not there was life on Earth at the beginning of the bombardment, such cataclysmic pounding would have enormous consequences for life on this planet, whether by destroying existing life or organic fragments or by delivering molecules and creating conditions suitable for life, the researchers add.
They find from the ages of the "clasts," or melted rock fragments, in the breccia meteorites that all of the moon was bombarded 3.9 billion years ago, a true global lunar cataclysm.
More likely asteroids than comets, based on some evidence from meteoritic trace constituents involved in the impacts and on other studies on what was happening at the time in the asteroid belt, Kring suggests.
www.spacer.com /news/lunar-00e.html   (840 words)

  
 Meteorite from Oman records its lunar origins, history
That date, 3.9 billion years ago, is a new key date for lunar and even terrestrial stratigraphy, the scientists say, because life on Earth would have evolved only after heavy meteorite bombardment ended.
He analyzed beryllium and carbon isotopes that told how long the meteorite was in space after it was launched from the moon and how long ago it fell to Earth at Oman.
Gnos, Al-Kathiri and Hofmann recognized in the field that the meteorite was of lunar or martian origin because it wasn't magnetic.
www.eurekalert.org /pub_releases/2004-07/uoa-mfo072904.php   (838 words)

  
 Lunar Meteorite
Mineral composition, chemical analysis results, isotope ratios, advanced optical studies, and textures of the lunar meteorites are all similar to those of samples collected on the lunar surface during Apollo missions.
Unlike meteorites originating from asteroids samples from the surface of earth's moon almost always contain free glass formed in space by impacts from space on the lunar surface.
the meteorite is a clast-poor impact melt breccia; mineral fragments and lithic clasts are embedded in a matrix of devitrified glass.
www.man.li /moonmete.html   (978 words)

  
 [No title]   (Site not responding. Last check: 2007-10-20)
Since most meteorite collectors do not purchase many meteorites over 600 grams I believe this is the perfect meteorite scale.
This postcard features the famous lunar meteorite, NWA 482 otherwise known as, North West Africa 482.  Show a photo of the complete mass, along with a complete slice and the moon in the background.
Back of postcard reads "Northwest Africa 482 This lunar meteorite, weighing 1015 grams, was discovered in the Sahara Desert late in the year 2000.  It is the only oriented and freshest lunar meteorite found to date and is arguable, the finest lunar meteorite, specimen on earth.
www.meteoritearticles.com /saleother.html   (389 words)

  
 Lunar Meteorite Ages Strongly Support Lunar Cataclysm
Lunar meteorite ages present new, strong evidence for the "lunar cataclysm," a 20-to-200 million-year episode of intense bombardment of the moon and the Earth at 3.9 billion years ago -- when the first evidence of life appeared on Earth, planetary scientists report in the Dec. 1 issue of Science.
Barbara Cohen of the University of Tennessee -- Knoxville analyzed the lunar meteorite ages for her dissertation research at the University of Arizona in Tucson.
Timothy D. Swindle and David A. Kring of the UA collaborated on the study and are co-authors on the Science article.
www.spacedaily.com /news/lunar-00e.html   (840 words)

  
 Lunar Meteorite / Dhofar 467
The Lunar meteorite Dhofar 467 is paired with the Dhofar 026 previously interpreted as an impact melt.
Detailed studies of the rock and comparison to Apollo lunar samples 15418 and 60017 indicate that the rock instead is a shocked, partly melted, granulitic breccia.
The Lunar meteorite Dhofar 467 is classified as feldspathic granulitic breccia
www.meteorites.tv /contents/en-us/d11.html   (110 words)

  
 Lunar and Meteorite Samples
Lunar samples include a variety of rocks and soils returned from the Apollo missions to the Moon.
Fragments composing this soil are from the breakup of highlands rocks by meteorites.
Lunar samples are accompanied by a copy of the "Exploring the Moon" educator's guide, and a videotape of "The Moon: The Geologic History and Future Exploration".
education.ksc.nasa.gov /erc/lunar.htm   (384 words)

  
 Lunar meteorite / Dhofar 459
The Lunar meteorite Dhofar 459 is paired with the Lunar meteorite Dhofar 026.
The Lunar meteorite Dhofar 457 is paired with the Lunar meteorite Dhofar 026.
Analysis by the researcher Paul Warren, from the Institute of Geophysics and Planetary Physics of the world-renowned UCLA, has revealed this meteorite to be piece of the moon, ejected into Space by asteroid impact.
www.meteorites.tv /contents/en-us/d4.html   (233 words)

  
 SPACE.com -- The Meteoritical Bulletin heralds discovery of the newest lunar meteorite
The new meteorite, called Dhofar 081, is the third lunar example found in a desert region of the Sultanate of Oman.
The meteorite was found November 29, 1999 in Omans Dhofar region, which has fast become a hotbed for space rock hunters.
And although there is the perception that scientists are swimming in moon rocks, the size of the overall lunar sample collection pales in comparison when its mass is pitted against that of a large meteorite fall.
www.space.com /news/lunar_meteorite.html   (615 words)

  
 [meteorite-list] Lunar Silent Auction Reminder   (Site not responding. Last check: 2007-10-20)
Willy Wonka, 1971 >From The Meteoritical Bulletin No. 87 Dhofar 307 19°19.7'N, 54°46.9'E Oman 2001 April 14 Lunar meteorite (anorthositic impact melt breccia) A light-grey stone weighing 50 g was found in the Dhofar region of Oman.
32.5 gram main mass endcut http://f1.pg.photos.yahoo.com/ph/robandcolleen11197/album?.dir=/ddd8 Dhofar 730 19°19.5' N, 54°47.5' E Oman 2002 November 9 Lunar meteorite (anorthositic impact-melt breccia) A light-grey stone weighing 108 g was found in the Dhofar region of Oman.
The meteorite may be paired with Dho 302, 303, 305, 306, 307, 309, 310, 311 and 731 found nearby.
six.pairlist.net /pipermail/meteorite-list/2004-May/141249.html   (539 words)

  
 Meteorite, meteor meteorite, plymouth meteorite   (Site not responding. Last check: 2007-10-20)
All the meteorites in the Meteorite Collection are available for study by...
A rare 1400-pound meteorite was discovered seven feet underground by a collector in an area of Kansas long known for producing prized space rocks.
Meteorite research at the USGS: studies of alteration processes in the early solar system and links to announcements of new meteorites around the world.
www.meteoriterecords.com /meteorite.html   (1076 words)

  
 Science News: Finding a lunar meteorite's home
By measuring the rock's age, the researchers have precisely dated the rock's lunar home, the Imbrium impact basin, which is the youngest of the moon's large impact craters.
That appearance is typical of lunar rocks, but this meteorite turns out to be exceptional.
The group describes the turbulent history of the meteorite, dubbed Sayh al Uhaymir (SaU) 169, in the July 30 Science.
www.findarticles.com /p/articles/mi_m1200/is_8_166/ai_n6205988   (385 words)

  
 Asuka 881757 - Lunar Meteorite   (Site not responding. Last check: 2007-10-20)
Asuka-881757, a coarse-grained mare basalt, is one of the few unbrecciated lunar meteorites (photo courtesy of the National Institute of Polar Research, Tokyo).
Fernandes V. A., Morris A., and Burgess R. New Ar-Ar Age determinations for the lunar mare basalts Asuka 881757 and Yamato 793169 (abstract).
Masuda A. and Takahashi K. Origin of a lunar meteorite Asuka 881757: REE geochemistry (abstract).
epsc.wustl.edu /admin/resources/meteorites/asuka881757.html   (440 words)

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