Have occurred in Xinjiang, the world's largest meteorite shower fell 425 km | | meteorite rain in Xinjiang _ news
Larger meteorites falling from the sky during the flight, due to the impact of high temperature, high pressure air, burst in midair. If the meteorite parent body is big enough, opens the scattered fragments rained to the ground, a phenomenon known as "Meteor rain".
In 1898, the iron meteorite was found in Xinjiang, also known as the "Silver camel", weighed 28 tons, is the world's fourth-largest meteorite. "Silver camel" is currently stored in the Museum of geology and mineral resources in Xinjiang.
AP a, discovered in 1898, weighed 28 tons of huge iron meteorite, discovered in 2004, 430 kg iron meteorite, discovered in 2011, 5 tons of iron meteorites, which spans more than 100 years of "extraterrestrial" How come to Earth? What is the connection between them?
13th, scientists at the Purple Mountain Observatory, Chinese Academy of Sciences announced that these meteorites are the world's biggest meteorite rain--International Institute of meteorites is named "Altai meteorites rain." Its fall with 425 kilometers, far after the world's largest meteorite shower.
Purple Mountain Observatory, Chinese Academy of Sciences Chemistry Xu Weibiao of the chief scientist studying meteorites and planetary science laboratory for more than 30 years. According to him, has a "extraterrestrials" known meteorites are extraterrestrial human research first-hand information.
Through and United States California University Los Angeles at the cooperation, Xu Weibiao led of project mission Group confirmed, 2011 in Xinjiang Altay small donggou area found of 5 tons heavy King iron meteorite wuxilike, main mineral is iron lines stone, and nickel lines stone and collection lines stone, Deputy mineral has meteorite p iron nickel stone, and meteorite carbon iron and meteorite sulfur chromite, and previously found of Xinjiang iron meteorite and Ulla Republika Taiwan iron meteorite phase consistent. Trace element geochemical analysis shows, these three pieces of iron meteorite belonging to the paired meteorites, derived from a common parent.
"This means that, although the time span of the meteorite was found for more than 100 years, but before the Earth, comes from the same parent body, is passing through the Earth's atmosphere, scattered after the explosion occurred, forming a large meteorite rain. "Xu Weibiao said.
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Meteorite "face value" not high paid a lot of money
After most of the atmosphere of violence flaming meteorite "face value" is not high, wuxilike iron meteorite slice looks like dusty holodecks. Due to the large number of rare and scientific value, the meteorite is worth a lot of money. Some meteorites and even Super gold, diamonds. For research purposes, and many scientific research units will go to the international market to buy meteorites. There are more and more people at home and abroad collections of meteorites.
Amazing discovery
The Moon is Earth's "sister"?
Scientists believe the meteorite is the human gift of the universe, they are full of "physical examination" to get first-hand information, helps to reveal the global astronomy still searching "three origin", that is, the origin of the universe, planetary origins and the origin of life.
Recently, through the study of Lunar meteorites, China and the United States astronomers found striking: the Moon is most likely the Earth and other celestial bodies "violent collision", she is the Earth's "sister".
Responsible editor: Wu Yan
Article keywords:Xinjiang meteorite fall
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新疆曾发生世界最大陨石雨 陨落带长达425公里|新疆|陨石雨_新闻资讯
较大的陨石在陨落过程中飞行，由于受到高温、高压气流的冲击，会在半空发生爆裂。如果陨石母体足够大，爆裂开的碎块会像雨点一样散落到地面，这种现象称为“陨石雨”。 1898年，新疆铁陨石被发现，又称“银骆驼”，重达28吨，是世界第四大陨石。“银骆驼”目前存放在新疆地质矿产博物馆内。 据新华社电 一块1898年发现的重达28吨的巨大铁陨石、一块2004年发现的430公斤铁陨石、一块2011年发现的5吨铁陨石，这三位跨越100多年的“天外来客”如何来到地球？他们之间又有何联系？
13日，中科院紫金山天文台的科学家宣布，这些陨石同属于世界上最大的一场陨石雨——国际陨石学会命名为“阿勒泰陨石雨”。其陨落带长达425公里，远超此前世界公认的最大陨石雨。
中科院紫金山天文台天体化学与行星科学实验室首席科学家徐伟彪研究陨石长达30年。据他介绍，有着“天外来客”之称的陨石是人类研究地外行星的第一手资料。
通过与美国加州大学洛杉矶分校合作，徐伟彪领衔的项目团组证实，2011年在新疆阿勒泰小东沟地区发现的5吨重特大铁陨石乌希里克，主要矿物是铁纹石、镍纹石和合纹石，副矿物有陨磷铁镍石、陨碳铁和陨硫铬铁矿，与此前发现的新疆铁陨石和乌拉斯台铁陨石相一致。微量元素地球化学分析显示，这三块铁陨石属于成对陨石，来源于同一母体。
“这意味着，虽然这些陨石被发现的时间跨越了100多年，但它们在光临地球之前，来源于同一母体，是在穿过地球大气层时，发生爆炸后散落开来，形成了一场巨大的陨石雨。”徐伟彪说。
■新闻链接
陨石“颜值”不高身价不菲
经过了大气层暴力燃烧的陨石大多“颜值”不高，铁陨石乌希里克的切片看起来是灰扑扑的。由于数量稀少、科研价值较大，陨石身价不菲。有些陨石甚至价超黄金、钻石。出于科研目的，很多科研单位都会到国际市场上去购买陨石。国内外也有越来越多的人收藏陨石。
■惊人发现
月球是地球的“亲姐妹”？
科学家认为，陨石是茫茫宇宙给人类带来的厚礼，对它们进行全方位的“体检”能够获得众多第一手的信息，有助于揭示全球天文学界至今仍在苦苦探索的“三起源”，即宇宙起源、天体起源和生命起源。
近日，通过研究月球陨石，中国和美国两国的天文学家又有惊人发现：月球很有可能是地球和其他星体“暴力相撞”的产物，她是地球的“亲姐妹”。
责任编辑：吴颜
文章关键词： 新疆 陨石雨
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