查询词典 zircon

According to the metamorphic fluid involved, metamorphic zircon can be divided into five subtypes: metamorphic recrystallization via solid-state transformation, replacement alteration or dissolution reprecipitation, and metamorphic growth corresponds to chemical precipitation from aqueous fluid or hydrous melt.

根据参与锆石改造的变质流体性质，进一步可将变质锆石区分为五种不同类型，即固态重结晶锆石、交代重结晶锆石、溶解重结晶锆石，以及富水流体和含水熔体中的生长锆石。

Based on a systematic petrographic and geochemical study and a zircon U-Pb SHRIMP age analysis, the authors revealed that the age of ore-hosting volcanics (XC01-1 rhyolitic tuff) is 180.4±3.5 Ma.

对西藏冈底斯带南部雄村铜金矿床的容矿火山岩和外围岩石进行了岩石学、地球化学、锆石年代学研究。

The zircon SHRIMP U-Pb chronological results show the ages of 584±7 Ma for the Lunckeryggen granite,619±7 Ma for the Defuk granite,534±13 Ma for the Mefjell syenitic rocks in the Sr Rondane Mountains,East Antarctica,representing the formation ages of the different Pan-African grantoid bodies.

本文通过对东南极索龙达讷山泛非期花岗质岩石采用高精度锆石U-Pb SHRIMP定年，获得Lunckeryggen花岗岩中锆石的年龄为584±7 Ma、Defuk花岗岩中锆石的年龄为619±7 Ma、Mefjell正长岩中锆石的年龄为534±13 Ma。

In contrast to zircon, titanite is quite reactive in most rocks contain Ca and Ti at different conditions. Therefore, its UPb ages are likely to yield the age of metamorphic crystallization rather than resetting by simple diffusion, such that metamorphic titanite may preserve complicated UPb system that contains information of the whole metamorphic history of the rock, which can be revealed by in situ UPb dating, e.g., SHRIMP, LAMCICPMS and LAICPMS.

由于榍石的组成元素均为岩石中的主要元素，很容易与其它矿物、熔体及流体发生反应，所以榍石的U-Pb年龄记录的更可能是结晶年龄，而不是简单的扩散重置年龄；也因为它容易反应，变质榍石复杂的UPb体系可能记录了岩石的整个变质历史信息。

From the point of the ΣREE,δEu, geochemical parameters and standard REE distribution patterns, lead-zinc mineralization altered rocks in the Shengmikeng deposit have close genetic relationship with the potassic trachyte porphyry with SHRIMP zircon age of 138.3±1.4 Ma.

从∑REE总量值、δEu值、地球化学参数及标准稀土元素配分模式图上看，生米坑铅锌矿化蚀变岩与钾质粗面斑岩具有密切的成因联系。

Some spore-pollen assemblages of late Trias and the youngest zircon of 225Ma were also obtained in this type.Deriveration of the ore is from the upper crust according to the features of trace elements,zircorn U-Pb age and initial value of ~(87)Sr/~(86)Sr.It has not any charateristics of the mantle.

底辟-侵位角砾岩是本次工作新发现的，它在空间上与构造-膏溶角砾岩密切伴生，剖面上呈脉状或火焰状分布，局部呈脉状穿刺于围岩中，其胶结物中含有晚三叠世的孢粉组合，最年青锆石的年龄为225Ma，角砾岩本身是铅和锌的富矿体。

Through the age analysis on apatite and zircon fission track, there have five stages of tectonic movements, respectively occurred in late Trias, from mid-late period in early Cretaceous to late Cretaceous, Eocene, Oligocene and Miocene.

通过对盆地内磷灰石和锆石年龄分析，焉耆盆地存在5期构造运动：晚三叠世、早白垩世中晚期-晚白垩世、始新世、渐新世和中新世。

SHRIMP zircon dating suggests that Yajiangqiao trondhjemite was emplaced in 778 ± 11 Ma.

雅江桥奥长花岗岩的SHRIMP锆石U-Pb年龄测定结果为778±11 Ma 。

For developing a method to reduce the emanation coefficient of Rn in materials, emanation coefficient of Rn in geological uranous materials such as zircon, uranium-bearing ore, etc is measured. Heating is used to study the effect of heating temperature on emanation coefficient of Rn.

通过了解锆英砂、铀矿粉、石英砂铀矿粉混合物等含铀地质材料中222 Rn的析出情况，探索了降低这些材料中氡射气析出率的方法，并应用灼烧法研究了灼烧温度对上述材料中氡射气析出率的影响。

Based on the discrimination of the previous data, thirteen granites plutons are selected to be dated by high precision single grain zircon U-Pb method and one pluton is selected to be dated by Rb-Sr and Sm-Nd internal rock-mineral isochron.

本文在充分了解和掌握前人资料和研究成果的基础上，挑选了13个花岗岩体进行了详细的单颗粒锆石U-Pb定年，一个岩体进行了全岩—矿物Rb-Sr和全岩—矿物Sm-Nd内部等时线定年。

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。