Found in rocks throughout Earth's crust, zircons are some of the oldest bits of mineral on Earth.
广泛分布于地壳各处岩石中的锆石是地球上最古老的矿物之一。
"This was a big surprise to us," Rasmussen says, especially because the zircons themselves ranged in age from 3.34 billion and 4.24 billion years old.
“这个结果让我们大吃一惊，”拉斯姆森说，特别是因为那些锆石样本自身的年龄已经有33.4亿- 42.4亿年了。
If that type of mineral is missing from all of the zircons in a particular sample, he notes, that's a clue that the inclusions may have been chemically altered.
如果在某一次取样中，所有的锆石里都不含这种矿物，那就是在提示包体的化学成分可能已经发生了改变。
Rather than matching the ages of the zircons, the researchers note, the ages of the inclusions matched the ages of the metamorphic minerals surrounding the zircons.
研究人员发现，这些包体的年代与锆石样本周围的变质矿物的年代相当，而与包裹它们的锆石样本年代不符。
Today, Earth teems with thousands of kinds of minerals, from agates to zircons.
现在，地球上到处是各种各样的矿物，从玛瑙到锆石应有尽有。
The dating of these zircons indicates that they can be divided into two groups according to their ages.
定年结果表明，变质英安岩中锆石具有两组年龄。
The analysis results show that there are two types of zircons from the Danzhu granodiorite: magmatic zircon and metamorphic zircon.
研究结果表明， 该花岗闪长岩中存在两种不同类型的锆石：岩浆锆石和变质锆石。
In the cathodoluminescence images, the zircons show good crystal morphology and clear oscillatory zoning, as is the case of magmatic zircon.
阴极发光图像中，锆石具有较好的晶形，并显示出清晰的岩浆锆石韵律环带结构。
Most zircons separated from these volcanic rocks exhibit striped absorption and obvious oscillatory zoning, with a few ones showing the core-rim structure.
那曲地区的中生代火山岩多数锆石具有生长环带，部分锆石显示核边结构。
If the earth's climate was cool enough for oceans of water early on, then maybe zircons could tell us if continents and other features of modern earth also existed.
倘若地球的初始气候凉爽得适合海水存在，那么锆石或许可以告诉我们，陆地与近代地球的其他特征在当时是否也存在。
The zircons we studied were depleted in oxygen 18 relative to the mantle, and such depletion occurs only if the crystals formed from rocks that interacted with rain or snow.
因为相较于地函，我们所研究的锆石，氧18含量偏低，而这种情形只有可能是晶体的母岩曾经和雨水或雪发生交互作用。
In the Cathodoluminescence (cl) images the zircons extracted from the dioritic gneiss show good crystal morphology and clear oscillatory zoning, as is the case of magmatic zircon.
在阴极发光图像中，片麻岩中的锆石具有较好的晶形，并显示出清晰的岩浆锆石韵律环带结构。
These zircons ended up in the Jack Hills rocks after eroding from rocks that were even more ancient, and the researchers painstakingly sorted the individual crystals from other bits of minerals.
这些锆石是从年代更久远的岩石上被剥蚀下来之后进入杰克山的岩石中的，研究人员费了很大力气才把这些锆石晶体从其它矿物碎片中拣选出来。
Zircons in the rocks were exposed to the same conditions.
这些岩石中的锆石也暴露在同样的环境中。
Zircons from ultra-high pressure (UHP) metamorphic metabasite and metafelsic rock in Dabie orogen were investigated by cathodoluminescence and Laser Raman spectrometry.
利用阴极发光和激光拉曼研究了大别山俯冲带超高压基性和长英质变质岩中的锆石。
Zircons from ultra-high pressure (UHP) metamorphic metabasite and metafelsic rock in Dabie orogen were investigated by cathodoluminescence and Laser Raman spectrometry.
利用阴极发光和激光拉曼研究了大别山俯冲带超高压基性和长英质变质岩中的锆石。
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