| 词条 | Yamato 691 |
| 释义 |
|Name= Yamato 691 |Image= |Image_caption= |Type= Chondrite |Class= Enstatite chondrite |Group= |Structural_classification= |Composition= Pl(An32-75), En99.2Wo-0.3, tro., nini., oldh., perr., schr., metal(2.2-2.5%Ni, 0.16-0.22%Co)[1] |Shock= |Weathering= |Country= Antarctica |Region= Queen Fabiola Mountains (Yamato Mountains) |Lat_Long= {{coord|71|50|S|36|15|E|display=inline,title}}[2] |Observed_fall= No |Fall_date= 4.5 billion years ago |Found_date= December 21, 1969 |TKW= {{convert|715|g|lb}} }} The Yamato 691 (abbreviated Y-691) is the 4.5 billion year old chondrite meteorite discovered by members of the Japanese Antarctic Research Expedition[3] on the blue ice field of the Queen Fabiola Mountains (Yamato Mountains) in Antarctica, on December 21, 1969.[2] HistoryYamato 691 was one among 9 meteorite specimens identified by the Japanese Expedition Team in 1969. It was later studied at the Max Planck Institute for Chemistry, Mainz, Germany.[4] On April 2011, NASA and co-researchers from the United States, South Korea and Japan have found a new mineral named "Wassonite" in Yamato 691.[5] Composition and classificationThis meteorite is a stony enstatite chondrite. Minerals reported from the meteorite include:[6]
See also
References1. ^{{cite web|title=Catalog of Antarctic Meteorites|url=http://yamato.nipr.ac.jp/AMRC/AMRC/meteoritelist.pdf|publisher=National Institute of Polar Research|accessdate=2011-04-07|location=Tokyo|date=2000}} 2. ^1 {{cite web|title=Yamato 691|url=http://www.lpi.usra.edu/meteor/metbull.php?code=24358|publisher=The Meteoritical Society|accessdate=2011-04-07}} 3. ^{{cite web|title=Scientists Find New Type Of Mineral In Historic Meteorite|url=http://www.nasa.gov/home/hqnews/2011/apr/HQ_11-098_New_Mineral.html|publisher=NASA|accessdate=2011-04-07|author=Dwayne C. Brown|author2=William Jeffs|date=2011-04-05}} 4. ^{{cite journal|last=Clarke|first=R. S., Jr.|title=Meteoritical Bulletin, No. 52|journal=Meteoritics|volume=9|url=http://articles.adsabs.harvard.edu//full/1974Metic...9..101C/0000118.000.html|pages=118|date=1974|bibcode=1974Metic...9..101C|accessdate=2011-04-07}} 5. ^{{cite web|last=Bryner|first=Jeanna|title=4.5-Billion-Year-Old Antarctic Meteorite Yields New Mineral|url=http://www.livescience.com/13581-antarctic-meteorite-mineral-wassonite.html|publisher=LiveScience|accessdate=2011-04-07|date=2011-04-06}} 6. ^{{cite web|title=Yamato 691 Meteorite, Queen Fabiola Mountains (Yamato Mountains), Antarctica|url=http://www.mindat.org/locdana-228143.html|accessdate=2011-04-07}} External links
1 : Meteorites found in Antarctica |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。