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- zircon isotope age 锆石年龄
- 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。
- The ammonites from the lower shale and isotope age from its upper volcanic rock(define) the age of Sangxiu Formation from Berriasian to Hauterivian of Lower Cretaceous. 桑秀组下部的页岩段与江孜甲不拉组的最下部地层相当,上部火山岩的同位素年龄为133 M a。
- A Archaeozoic granulite with an isotope age(Sm-Nd isochoron) of 3450 Ma,was found firstly in Proterozoic Dakendaban Group in eastern north margin of Qaidam Basin. 在柴达木盆地北缘东段,首次从古元古代达肯大坂岩群中发现太古宙麻粒岩,并取得3450Ma Sm-Nd等时线同位素年龄。
- By the known data of isotope age determination, Nanhuaian time-structure frame was principally set up with the top boundary about 700 Ma and bottom about 800 Ma. 综合已有同位素测年数据，初步建立起南华纪年代构造格架，确立南华纪底界年龄为800 Ma左右，顶界年龄为700 Ma左右。
- HUANG Dian-hao.Re-Os isotope age of main Cu-Mo metallogenetic belt in China and associated mineralizing evolution[J].Mineral Deposits,1998,17(Sup.):813-816. [9]黄典豪.;我国主要铜(钼)成矿带的铼-锇年龄及成矿时空演化[J]
- How to define the age of the west Dayanchi ultrabasic rocks, East Tianshan, Xinjiang, has long been questionable because of lack of reliable isotope age data. 大盐池西超基性岩一直缺乏可靠的年龄资料,因此时代厘定一直存在疑问。
- Through U-Pb isotope age study in sheeted dike complex, has gained the isochrone age is 114-133Ma.The age is early cretaceous,which indicates the time of formation of sheeted dike complex. 另外，在该蛇绿岩套中的岩墙群进行了单颗粒锆石U-Pb同位素测年，获得的表面年龄值为114-133Ma之间，时代为早白垩世，基本反映了席状岩墙群的成岩年龄。
- 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。
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- Keywords isotope age;volcanic rock;granite;age of the hekou Group; 同位素年龄;火山岩;花岗岩;河口群时代;
- 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。
- The annular markings on a tree indicate its age. 树的环形纹理显示其年龄。
- Age and wedlock we all desire and repent of. 成年与婚姻，均为我辈所欲，亦为我辈所悔。
