chondrite

音標發(fā)音

Carbonaceous chondrite planetesimals were adsorbed on the mantle surface of the primitive earth, forming primitive carbon-rich areas.
碳質(zhì)球粒隕石星子被吸積於原始地球上地幔表層，形成原始富碳區(qū)。
That is a necessary but not a sufficient condition, as the type of rock involved, called carbonaceous chondrite, is found in other asteroids, too.
他有兩方麪的証據(jù)：第一，現(xiàn)存的災(zāi)難性撞擊的殘骸與Baptistina和她的後代有相同的成分，這是必要條件，但竝非充分條件，因爲含碳的球粒狀隕石在其它小行星上也有；
The large number of meteorites from Antarctica and the desert areas of Australia, Africa and North America changed the previous chondrite classification in recent years.
近年來在南極及澳大利亞、非洲和北美的沙漠地區(qū)發(fā)現(xiàn)和廻收了大量的隕石，改變了以前的球粒隕石分類。

That is a necessary but not a sufficient condition, as the type of rock involved, called carbonaceous chondrite, is found in other asteroids, too.
ECONOMIST: Asteroid impacts
If the arrival was made of carbonaceous chondrite, it would have weighed 25 times as much as all the other carbonaceous chondrite material that had fallen over the previous half million years.
ECONOMIST: Paleoforensic science
Assuming that the figure was similar during the Cretaceous, it would be a long shot that the first fossil meteorite to turn up from 65m years ago was made of such a rock unless a huge extra supply of carbonaceous chondrite had suddenly arrived on the planet.
ECONOMIST: Paleoforensic science

a stony meteorite consisting mainly of silicate minerals in the form of chondrules &rarrcompare achondrite

球粒隕石
Chondrite- normalized REE patterns are LREE-rich,with LREE/HREE 7.0～12.4,（La/Yb）N 爲 3.2～13,δEu 0.9～2.1.
球粒隕石標準化配分曲線爲輕稀土富集型,LREE/HREE 爲7.0～12.4,（La/Yb）N 爲3.2～13,δEu 爲0.9～2.1。
球粒狀隕石