查询词典 zircon

Zircon jewelry should be stored carefully because although this ancient gem is hard, facets can abrade and chip.

锆石饰品应存放小心，因为虽然这个古老的宝石难、面、筹码可以研磨。

In order to investigate the capabilities of zircon as waste forms for immobilizing simulated trivalent actinides, trivalent europium (Eu3+) was used as the simulacrum for trivalent actinides, the waste forms containing 20 mol% Eu3+ were successfully synthesized by high temperature solid reaction and using ZrO2, SiO2 and Eu2O3 powders as starting materials.

中文摘要：为研究锆英石基三价锕系模拟核素固化体的性能，利用Eu3+作为三价锕系核素模拟替代物质，以ZrO2、SiO2和Eu2O3粉体为原料采用高温固相法制备了包容Eu3+为20mol%的锆英石基固化体。

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SHRIMP zircon U-Pb ages of gabbro, anorthosite, and plagiogranite from the ophiolitic complex, and related marginal granite in the Jinshajiang area, provides important geochronological constraints for the oceanic spreding, the subduction and final collision, therefore, which constructs a time framework for the Jinshajiang Paleo-Tethys evolution.

应用SHRIMP方法测定了金沙江蛇绿岩中的各类辉长岩，斜长岩，斜长花岗岩，及沿金沙江带分布的陆缘型花岗岩的年龄，提供了洋壳形成，俯冲消减和碰撞造山事件等古特提斯演化的重要的同位素地质年代学制约，从而建立了金沙江古提斯演化的年代格架。

By the single zircon U Pb dating method, the quartz syenite porphyny yielded an age of concordance (1 731±29)Ma, and the aegirine augite syenite and syenogebbro are dated upper cocordi...

应用单锆石U Pb法测定年龄，石英正长斑岩谐和年龄为( 1731± 2 9)Ma ，霓辉正长岩、正长辉长岩上交点年龄分别为( 1644± 14)Ma、( 1750± 65)Ma.1650～ 170 0Ma是碱性岩浆活动热构造事件的标志，石英正长斑岩被中元古代晚期的高山河组不整合覆盖，故以 1650～ 170 0Ma作为熊耳群的上限。1650～ 170 0Ma热构造事件是华北地块重大地质事件，有可能是进一步划分中元古代重要的年龄界限。

Based on the petrological and geochronological study of metamorphic complexes from the Grove Mountains, the following conclusions are reached.(1)Exsolution texture is widely found in clinopyroxene in mafic granulites. A peak metamorphic temperature of 850 C was obtained from the reintegrated compositions of exsolved clinopyroxene. The preservation of augite megacrysts suggests a single episode of high-grade metamorphism for the Grove Mountains.(2)The compositional comparison of garnet from pegmatites with that from country rocks demonstrates that garnet in pegmatites is of xenocryst origin, and late amphibolite facies metamorphism does not occur in this area.(3)The Pan-African charnockite and post-tectonic sheet-like granite were first recognized in East Antarctica. Their occurrences suggest a collisional orogeny during the Pan-African time.(4)The SHRIMP U-Pb zircon dating on various rock types indicates that the major metamorphism in the Grove Mountains occurs at c. 550 Ma, and the tectonothermal evolution terminated at c. 500 Ma. The Grenvillian granulite facies metamorphism did not develop in the studied area.(5)The Prydz belt, the second Pan-African suture within the Gondwana suppercontinent, was further comfirmed based on this study. The Gondwana suppercontinent was not formed by the simply juxtaposition of East and West Gondwana, but by the collision of several blocks during the Pan-African time.

本项目通过格罗夫山地区高级变质杂岩的变质岩石学和同位素年代学研究，获得如下重要认识：（1）发现辉石出溶结构，由此获得峰期变质温度为850 C，并根据火成普通辉石的识别确定该区只存在单相麻粒岩相变质；（2）通过伟晶岩中石榴石斑晶与围岩中石榴石的对比研究提出了石榴石的捕虏晶成因，进而确定该区不存在晚期角闪岩相变质作用；（3）在东南极首次识别出泛非期紫苏花岗岩和后构造层状花岗岩，为泛非构造热事件的碰撞造山成因提供了重要佐证；（4）对不同岩石类型的锆石SHRIMP定年精确地限定了格罗夫山地区主期变质作用发生于泛非期，～550 Ma，热事件结束于～500 Ma，年代学数据没有揭示在该区存在格林威尔期麻粒岩相变质作用的迹象；（5）进一步确认了东南极内部普里兹带的存在，它属于冈瓦纳超大陆内部的第二条泛非期缝合带，据此认为冈瓦纳超大陆并不是由东、西冈瓦纳陆块的简单拼合而成，而是多个不同块体拼合的结果。

It is relatively abundant, occurring as zircon (also marketed as a natural gemstone) and baddeleyite.

高纯度的锆为质软、具有延展性的金属，锆的丰度相当高，以锆石矿和斜锆石矿的形式存在。

A lustrous gray strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon .

一种有光泽、灰白色、坚固的金属元素，类似钛，在核反应堆中用作中子吸收剂，见于斜锆石中。

The mineral inclusions mainly include rutile, zircon, apatite, biotite, spinel and so on.

其矿物包裹体有金红石、锆石、磷灰石、云母以及尖晶石等。

The testing results show that the average Mohs hardness of the samples is up to 4.45 and the average density is up to 2.7485 g/cm^3, where the major mineral is sericite with small scaly structure and orientational arrangement, and the other minerals are quartz, chlorite and a small quantity of zircon, orthoclase, kaolinite and bornite, etc.

测试结果表明：样品的平均摩氏硬度为4.45，平均密度为2.7485g/立方公分；其主要矿物为绢云母，呈细小鳞片状结构，定向排列，还含有石英、绿泥石以及少量的锆石、正长石、高岭石和斑铜矿等。

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。