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- The first is characterized by intermediate-basic intrusive rocks, and the second, by acid intrusions. They are of middle Hercynian age as shown by a Rb-Sr whole-rock isochron age determination of 315 Ma. 依据Rb-Sr全岩等时线其年龄为315.;7Ma;属于海西中期。
- 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。
- whole-rock Rb-Sr isochron age of granite pluton 花岗岩全岩Rb-Sr等时线年龄
- In this paper, 40 Ar- 39 Ar data has been obtained on garnet and omphosite from eclogite samples using laser probe. Two 40 Ar- 39 Ar isochron ages have been determined this way. 采用激光探针 40 Ar- 39Ar法对大别山碧溪岭榴辉岩样品中的石榴石和绿辉石单颗粒矿物进行原位测定 ,获得了两条等时线年龄。
- 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。
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- 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。
- 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。
- Her widowhood condemns her to a lonely old age. 守寡使她不得不过着孤独的晚年生活。
- I don't think he looks his age of seventy. 我感到他看起来不像70岁的人。
- He has always assorted with men of his age. 他总是与和他年令相仿的人交往。
- He's of an age when he ought to settle down. 他已经到了应该安顿下来的年龄了。
- Age stole onward and benumbed me more and more. 年纪渐老使得我(反应)越来越迟钝。
- K-Ar ISOCHRON AGES OF PRECAMBRIAN ROCKS IN NORTHERN AND NORTHEASTERN CHINA 我国华北及东北地区前寒武纪岩石K-Ar等时年龄