查询词典 zircons

The ages of 42 to 48 Ma may be mixing ages. Finally the origin of zircons and rock － controlling mechanism are discussed.

最后对锆石的成因和花岗岩的成岩机制等进行了初步探讨。

There are three stages upon formation sequence of the zircons.

按形成的先后顺序至少存在Ⅰ期、Ⅱ期和Ⅲ期等3期锆石。

However, some observers have raised the possibility that the diamonds may be contamination, introduced during polishing of the zircons.

目前更大的可能性是这块钻石被污染过，在锆石磨光的时候被仪器污染过了。

It is possible that the diamonds all formed 4.3 billion years ago, and later got shoved into younger crystals. Or perhaps diamonds were incorporated into zircons over and over again through some unknown process, in the same place, at different times in history.

这些钻石很可能都是在43亿年前形成的，但是在随后的岁月中，被外力挤压进历史较短的晶体中；又或者可能在同一地点，这些钻石受作用于某些未知的过程，在不同阶段一次又一次的和锆石晶体相融合。

Characteristics of zircons revealed by cathodeluminescence images from rutile ores with different colors are incredible similar.

从红色和黑色金红石矿中的锆石阴极发光图像来分析，尽管上述三个样品的矿物组合、金红石的颜色、产状及形成P—T条件有所不同，但其中锆石的特征及年龄结果却有惊人的相似，甚至完全相同。

Once considered a diamond alternative, today we know that natural zircons are in fact the most ancient materials on Earth, holding within their brilliant depths a time capsule of our planet's birth.

一度考虑替代了钻石、今天我们知道，其实都是天然锆地球上最古老的材料，持有时间囊其辉煌深处我们这个星球的诞生。

Given what geologists think the temperature of these zircons was when they formed, that means the diamonds were probably squeezed into being by the pressure of 100-150 kilometres of crustal rock lying above them.

交给地址学家思考的问题是，这些锆石形成时的温度，这意味着钻石很可能被100到150公里厚的地层的压力下被挤压形成的。

Given what geologists think the temperature of these zircons was when they formed, that means the diamonds were probably squeezed into being by the pressure of 100-150 kilometres of crustal rock lying above them.

假定地质学家所认定的锆石的温度就是指它们成形时需要的温度，那也就是说那些钻石很可能在承受了来自于外部的，厚达100到150公里的地壳岩石的压力后被挤压成形。

Two groups of ages were obtained, with weighted average 206Pb/238U ages of 973±60Ma for round zircons, and 422±7Ma for prismatic ones, respectively.

对26颗锆石核部和生长边进行28次U-Pb同位素分析，获得两组206Pb/238U年龄，分别为973±60Ma和422±7Ma。

If nitrogen is present as single atoms, it would hint that the diamonds were produced rapidly and at relatively low temperature - as might happen if the diamonds formed from pockets of graphite in the zircons in a single, rapid event. That would make the diamonds young.

如果氮元素被证实是以单个原子的形式存在，这意味着钻石是在相对低温的环境下快速形成的——对那些由锆石中的石墨矿囊转变成形的钻石来说，如果单一而快速的条件具备，这种情况就很可能会发生，并将证明这些钻石的年代并不久远。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。