查询词典 zircons

In addition, there are a significant amount of inherited zircons at the age of ?2.7Ga, which indicates that the granitoids may be the products of remelting of former crustal rocks and the Jiaodong Comples-Group is the major component of the source rocks.

其中存在年龄为2.7Ga左右的继承性锆石，这显示了这些花岗岩类为壳源重熔的产物，而胶东岩群可能为其重要源岩之一。

Isotopic age studies of the zircons from both the metamorphic rocks and their anatectic derivatives by the single crystal U-Pb method have been carried out by the authors.

河北平山小觉地区早前寒武纪阜平群的部分岩石，在经历了区域变质高峰之后，又遭受了差异性深熔作用的改造。

The upper intercept age indicats a low limit of crystal age of the zircons and suggests a basaltic volcanic event at 1.8 Ga ago in this area.

其上交点年龄指示了该锆石的最小结晶时代，它表明在18亿年时该地区曾有一次玄武质火山岩事件。

In order to acquire the relationship between the metamict degree of zircons and contents of radio-elements, zircon samples of this paper from kimberlites of Mengyin, Shandong Province are tested by CL, Raman, SHRIMP etc.

为获得鋯石变生程度与放射性元素质量分数之间的相互关係，对来自山东蒙阴金伯利岩中的鋯石进行了阴极发光、激光拉曼光谱、离子探针测试和研究。

Because zircons are 8-10 feet below the surface of the earth under the earth, and in addition to local deposits located below the horizon, so that when water is often flooded mines.

因为锆石大多位于表土层下8-10英尺下，且当地的矿床又多位于水平线以下，因此开采时水经常会淹没矿坑。

Based on the interior structure of zircons from the ore-bearing Longwang gabrro intrusion and the results of CL analysis, the authors performed in-situ zircon U-Pb dating by means of LA-ICP-MS and, as a result, obtained reliable age data.

文章在运用阴极发光技术对锆石晶体结构研究的基础上，利用LA-ICP-MS锆石原位定年方法，对含矿的龙王辉长岩体进行了年龄测定。

Therefore, the formation of the first episode of metamorphic zircons is correlated with fluid activity during the progressive high-pressure eclogite-faeies metamorphism.

年龄为240.9 4.8～245.1 3.1Ma的变质锆石的生长对应于板块俯冲过程中高压榴辉岩相变质作用期间的流体活动，而223.7 4.2-226.0 3.9Ma的变质锆石的生长可能对应了板块折返早期的流体活动。

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.

如果氮元素以单个原子存在，这将暗示这些钻石是在相对比较低温的情况下快速形成的。

SHRIMP U-Pb concordia ages of the cores of rounded zircons are 620 and 219 Ma, suggesting that the parental magma for the quartz diorite porphyry may have been derived from partial melting of basement materials of the South China block that had been modified by ultrahigh-pressure metamorphism.

具有细微震荡环带岩浆锆石的SHRIMP U-Pb年龄(117.7±1.6 Ma)显示该石英闪长斑岩体的形成时间为早白垩世；浑圆状锆石核部SHRIMP U-Pb谐和年龄为620 Ma和219 Ma，这表明该石英闪长斑岩的母岩浆可能起源于经历了超高压变质作用改造的华南地块基底物质的部分熔融。

The U-P dating data of zircons imply that topography was low in the west and high in the east of East China Sea shelf during the development of Eogene basin.

根据上述砂岩锆石U-P年龄，可以推测古近纪东海陆架盆地发育过程中，东海陆架东部地势较高。

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。