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- The carbon isotopic age by 14C of Krish cultural layer of this settlement is about 6650+50 y. BP or 5600-1480 y. 这些地区Krish文化层的~(14)C同位素年代为6650+/-50年,或者公元前5600-1480年。
- This zone consists of basalt, diabase and other basic intrusive rock, and the isotopic age is between 259 Ma and 292 Ma. 它们的同位素年代为（259±09）Ma-（292。0±0.;5）Ma。
- The times of every pluton intrusion have been preliminarily defined on the basis of the isotopic age data of the Mesozoic granitoids. 2、根据中生代花岗岩的同位素年龄资料，初步厘定了各岩体的侵入时代。
- According to data with fossils and sporopollens in underlying sediment stratigraphic and volcanic isotopic age determination,the volcanic is a lower Cretaceous equivalent of upper of Gouyang formation of Early Cretaceous. 根据其下伏沉积地层中化石和孢粉资料及火山岩同位素测年资料，白女羊盘组火山岩的时代为早白垩世，其层位相当于下白垩统固阳组的上部层位。
- The isotopic age of the volcanic rocks of the Mount Bowles Formation (MBF) outcropped on the eastern part of Livingston Island, South Shetland Islands, Antarctica have been remeasured by 40 Ar/ 39 Ar and laser microarea isochron age dating techniques. 采用40Ar/39Ar法和激光微区等时线方法，对南极南设得兰群岛利文斯顿岛东部产出的鲍勒斯山组火山岩重新进行了年龄测定。
- 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. 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。
- Isotopic ages of the two-s tage diabase sills are 706-723 Ma and 604-654 Ma， respectively，corresponding to the early and late Sinian period. 稀土元素配分模式为轻稀土富集型，但稀土元素分馏并不强烈。
- K-Ar isotopic ages of sulfide from ore suggest that the model age of deposit formation is 339.1 Ma,near to the Carboniferous stratum age,implying the start of sedimentary exhalative mineralization. 矿床硫化物K-Ar同位素年龄显示;矿床的模式年龄有2个年龄段:斑点状闪锌矿与结核状闪锌矿的模式年龄分别为387.;2;444
- It is located in the west fl ank of the Panxi rift, but the REE mineralization was developed in the postrift stage based on the isotopic ages and the geological environment. 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。
- K Ar dilution and 40 Ar/ 39 Ar step heating methods have been chosen in dating the isotopic ages of the volcanic and intrusive rocks of Byers Peninsula, Livingston Island. 以K－Ar稀释法和40Ar/39Ar阶段加热法对利文斯顿岛百尔斯半岛的熔岩和次火山岩测定了同位素年龄。
- The Understanding and Use of Rock Isotopic Age 岩石同位素年龄的理解与使用
- WU Fu-yuan,GE Wen-chun,SUN De-you,et al.The Sm-Nd,Rb-Sr Isotopic ages of the Archean granites in southern Jilin Province[J].Atca Petrologica Sinica,1997,13 (4):499-506. [9]吴福元;葛文春;孙德有;等.;吉林南部太古代花岗岩Sm-Nd;Rb-Sr同位素年龄测定[J]
- Through K-Ar isotope age study in pillow basalt,has gained the isochrone age is 139Ma.The age is the formation age of pillow basalt. 在枕状玄武岩中获得K-Ar（全岩）同位素年龄为139Ma（测试单位：宜昌地质矿产所同位素室），因此确定其时代为晚侏罗世晚期。
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- Isotopic ages of the cumulate xenoliths and their host dioritehave been systematically measured by means of whole rock Rb Sr isochron, K Ar and 40Ar 39Ar techniques and 8 ages are obtained. 分别用Rb Sr法、K Ar法和Ar Ar法 ,对堆晶岩捕虏体及其寄主岩全岩或单矿物进行了详细的同位素地质年代学研究 ,共获得各种年龄数据8件。
- Even the best quality rubber will perish with age. 就是最佳质量的橡胶也会因老化而腐烂。
- He come to the fore as a physicist at an early age. 他在早年就成了杰出的物理学家。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- It was difficult to tell his exact age. 很难判断他到底多大岁数。
