古生物化石、同位素年龄都证实了这一点。
This suggestion is supported by a lot of obtained fossils together with data of isotopic age.
沥青铀矿的同位素年龄为108—109百万年。
岩石同位素年龄已成为解决地质问题的一个重要手段。
Isotopic age has become an important means solving geological problems.
来自同位素年龄鉴定的证据指出，绿岩带在年龄上彼此变化相当大。
Evidence from isotopic dating suggests that the greenstone belts vary considerably in age.
由于无确切的同位素年龄资料熏这套岩石时代的归属一直存在不同认识。
Divergent views have long existed as to the age assignment of this suite of rocks due to the absence of exact isotope data.
赣中南地区晚元古代之潭头群、杨家桥群，一直缺乏同位素年龄数据资料。
No isotopic dating had so far been made for the L ate Proterozoic Tantou Group and Yangjiaqiao Group of the Central-South Jiangxi area.
根据不同地层化石、岩浆岩的同位素年龄，对朝不楞地区各构造层的构造时限进行了探讨。
According to fossils in different formations and the isotopic age of magmatic rocks, the article has discussed the time limit of structural events.
康定杂岩以往被认为是扬子地块太古宇的基底，但近年来的同位素年龄测定结果表明其并不是形成于太古宙。
The complex was traditionally considered as the Archean basement of the Yangtze Block, but recent isotopic dating results indicate that it was not formed in Archean.
帕米尔地区碰撞构造的岩石与同位素年龄，记录了印度板块对亚洲板块的运动，经历了俯冲、碰撞和榨挤3个阶段。
The rocks and isotopic age of collisional structures in Pamir Plateau recorded the movement of Indian plate towards Asian plate, which passed through 3 stages of subduction, collision and squeezing.
尽管我国好多矿床已经测得了大量同位素年龄资料，但这决不等于这些年龄数据均能标定成矿过程中某一地质事件发生的时代。
A lot of isotopic age data of many significant ore deposits in China have been obtained, but a certain geologic event in the mineralization process can not be marked by them.
四川牦牛坪矿床是世界上最大的稀土矿床之一 ，该矿床位于攀西裂谷西缘 ，同位素年龄表明稀土矿化发育于裂谷期后阶段。
It is located in the west flank of the Panxi rift, but the REE mineralization was developed in the postrift stage based on the isotopic ages and the geological environment.
地质学家在石笋上钻孔，使用铀衰变成钍的同位素的方法确定它们的年龄。
In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.
观察这些同位素可以估算出陨石球粒的年龄，他们是在45.6亿年前形成的。
Looking at these isotopes allows the chondrules to be dated, and they were formed 4.56 billion years ago.
行星科学家们可以通过计算一个特定元素有多少“母亲”放射性同位素衰变为“女儿”同位素来确定岩石的年龄。
Planetary scientists can determine a rock's age by calculating how many radioactive "parent" isotopes of a particular element have decayed into "daughter" isotopes.
癌症的风险是由遭到辐射时的年龄和在特定组织中聚集的放射性同位素决定的。
Cancer risk is determined by the age at exposure and concentration of radioisotopes in particular tissues.
对放射性同位素衰变的测量，尤其是铀、锶、铷、氩和碳，可允许地质学家更精确地确定岩层的年龄。
The measurement of the decay of radioactive isotopes, especially uranium, strontium, rubidium, argon and carbon, has allowed geologists to more precisely determine the age of rock formations.
将同位素水平和年龄联系起来就能知道细胞再生率。
Correlating ages with isotope levels revealed the regeneration rate.
文章根据同位素分析结果，提出了浅层地下水年龄都较年轻的观点。
On the basis of isotope analysis it is pointed out that the ages of the shallow groundwater are quite young in general.
矿石铅同位素模式年龄和石英斑岩体侵入年龄的一致性反映燕山期构造、岩浆和成矿作用的密切关系。
Consistence between isotopic model age of lead ore and intrusion age of quartz porphyry shows close relations among structure movements, magmatism and mineralization in Stage of Yenshan.
文章首次对采自矿床不同类型矿石中的辉钼矿进行了铼-锇同位素定年，获得等时线年龄为（168。
This study provides a high-precision Re-Os isotopic dating for ten molybdenite separated from the different ore types with an isochron age of (168.
同位素地质年代学是测量年龄，利率，和历史或行星的地质资料的一门科学，运用这些见解的过程和现象可以了解地球与行星科学系。
Geochronology is the science of measuring ages, rates, and histories of geologic or planetary materials, and using these insights to understand processes and phenomena in earth and planetary science.
年轻的钕同位素模式年龄表明该区存在新元古—显生宙的地壳增生。
The young Nd model ages suggest a significant crustal growth in the period of Neoproterozoic-Phanerozoic.
它们的初现面年龄与SPECMAP氧同位素记录结合为该柱建立了地层框架。
The stratigraphic framework of this core is established by the combination of the two FAD ages with the SPECMAP isotopic records in deep-sea sediments.
结合同位素地质年龄，区域对比分析，确认昔格达组属上新世至早更新世沉积。
Isotopic dating and regional stratigraphic correlation indicate that the Xigeda Formation is Pliocene-Early Pleistocene sediment.
因为它是稀有天然放射性同位素钾衰变而产生的，所以可以用来测定十万年以上的岩石年龄和采样。
Because a radioactive form of argon is produced by decay of a naturally occurring radioactive potassium isotope, it can be used to date rocks and samples more than 100,000 years old.
本文通过多种方法对冈底斯成矿带中驱龙、厅宫、冲江等斑岩铜矿进行了同位素定年研究，确定出冈底斯斑岩铜矿成岩年龄为1 7。
Several methods have been used for the isotopic dating of the Qulong, Tingong and Chongjing porphyry copper deposits, which gives out a diagenetic age of 17.
本文通过多种方法对冈底斯成矿带中驱龙、厅宫、冲江等斑岩铜矿进行了同位素定年研究，确定出冈底斯斑岩铜矿成岩年龄为1 7。
Several methods have been used for the isotopic dating of the Qulong, Tingong and Chongjing porphyry copper deposits, which gives out a diagenetic age of 17.
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