月球内部水储量与地球相当-凯发k8官网

月球内部水储量与地球相当
文章来源:未知 文章作者:enread 发布时间:2011-05-27 03:07 字体: [ ] 
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there is water inside the moon – so much, in fact, that in some places it rivals the amount of water found within the earth. the finding from a scientific team including brown university comes from the first-ever measurements of water in lunar melt inclusions. those measurements show that some parts of the lunar 1(地幔) have as much water as the earth's upper mantle.

lunar melt inclusions are tiny globules(水珠,药丸) of molten rock trapped within crystals that are found in 2 glass deposits formed during explosive 4. the new finding, published this week in science express, shows lunar magma(岩浆) water contents 100 times higher than previous studies have suggested.

the result is the 5 of years of 6 by the team searching for water and other volatiles in volcanic glasses returned by nasa apollo missions in the late 1960s and early 1970s. in a paper in nature in 2008, the same team led by alberto saal, associate professor of geological sciences at brown, reported the first evidence for the presence of water and used models to estimate how much water was originally in the magmas before 3.

"the bottom line," said saal, an author on the science express paper and the principal 7 on the research grants, "is that in 2008, we said the 8 water content in the lunar magmas should be similar to the water content in 9 coming from the earth's 10 upper mantle. now, we have proven that is indeed the case."

the new finding got a critical assist from a brown undergraduate student, thomas weinreich, who found the melt inclusions that allowed the team to measure the pre-eruption concentration of water in the magma and to estimate the amount of water in the moon's interior. in a classic needle-in-the-haystack effort, weinreich searched through thousands of grains from the famous high-titanium "orange soil" discovered by astronaut harrison schmitt during the apollo 17 mission before finding ten that included melt inclusions.



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1 y7tzs     
n.斗篷,覆罩之物,罩子;v.罩住,覆盖,脸红
参考例句:
  • the earth had donned her mantle of brightest green.大地披上了苍翠欲滴的绿色斗篷。
  • the mountain was covered with a mantle of snow.山上覆盖着一层雪。
2 blgzq     
adj.火山的;象火山的;由火山引起的
参考例句:
  • there have been several volcanic eruptions this year.今年火山爆发了好几次。
  • volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。
3 uomxv     
n.火山爆发;(战争等)爆发;(疾病等)发作
参考例句:
  • the temple was destroyed in the violent eruption of 1470 bc.庙宇在公元前1470年猛烈的火山爆发中摧毁了。
  • the eruption of a volcano is spontaneous.火山的爆发是自发的。
4 ca60b8eba3620efa5cdd7044f6dd0b66     
n.喷发,爆发( eruption的名词复数 )
参考例句:
  • there have been several volcanic eruptions this year. 今年火山爆发了好几次。 来自《简明英汉词典》
  • over 200 people have been killed by volcanic eruptions. 火山喷发已导致200多人丧生。 来自辞典例句
5 9ycxq     
n.顶点;最高潮
参考例句:
  • the space race reached its culmination in the first moon walk.太空竞争以第一次在月球行走而达到顶峰。
  • it may truly be regarded as the culmination of classical greek geometry.这确实可以看成是古典希腊几何的登峰造级之作。
6 mrkzq     
n.调查,调查研究
参考例句:
  • in an investigation,a new fact became known, which told against him.在调查中新发现了一件对他不利的事实。
  • he drew the conclusion by building on his own investigation.他根据自己的调查研究作出结论。
7 zrqzo     
n.研究者,调查者,审查者
参考例句:
  • he was a special investigator for the fbi.他是联邦调查局的特别调查员。
  • the investigator was able to deduce the crime and find the criminal.调查者能够推出犯罪过程并锁定罪犯。
8 vswz0     
adj.原始的;简单的;n.原(始)人,原始事物
参考例句:
  • it is a primitive instinct to flee a place of danger.逃离危险的地方是一种原始本能。
  • his book describes the march of the civilization of a primitive society.他的著作描述了一个原始社会的开化过程。
9 954a734b915730d6cf7e12d1b59fe317     
n.(火山喷发的)熔岩( lava的名词复数 );(熔岩冷凝后的)火山岩
参考例句:
  • the lake was ponded by lavas a long time ago. 这条湖是很久以前熔岩堵塞河道形成的。 来自辞典例句
  • such lavas also once came from the volcanoes in the cascade range in washington. 在华盛顿州的喀斯喀特山脉的火山也喷出过这样的熔岩。 来自辞典例句
10 31d93165da679292f22e5e2e5aa49a03     
adj. 枯竭的, 废弃的 动词deplete的过去式和过去分词
参考例句:
  • food supplies were severely depleted. 食物供应已严重不足。
  • both teams were severely depleted by injuries. 两个队都因队员受伤而实力大减。
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