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- Title: Zircon age and Sr-Nd-Hf isotopic composition of migmatite in the eastern Tengchong block,western Yunnan. 关 键 词: 滇西地区;基底;混合岩;锆石年龄;
- Determination of the adoption of a volcanic eruption produced the zircon age, these small islands in the 6100 disappearance of thousands of years ago. 通过测定火山爆发产生的锆石的年代,确定这些小岛是在6100万年前消失的。
- AATF is characterized by a large scale of dextral shearing that effected to the middle level of crust at least, and some syn-shearing intrusive pegmatites with the U-Pb signal zircon age of 910 Ma. 现今出露于柴达木北缘由晋宁期花岗岩和榴辉岩组合构成的“达肯达坂杂岩”是两个陆块碰撞过程中造山带根部的地质标志。
- Lu Songnian and Li Huimin.A precise U-Pb single zircon age determination for the volcanics of Dahongyu Formation, Changcheng System in Jixian.Bull.Chinese Acad.Geol.Sci., 1991, 22: 137-146. [9]陆松年; 李惠民.;蓟县长城系大红峪组火山岩的单颗粒锆石U-Pb法准确定年
- Title: An evaluation of zircon U-Pb dating for metamorphic rocks and comments on zircon ages of Dabie orogen. 关键词:锆石计时;岩浆锆石和变质锆石;蜕晶化作用;增生-混合作用;重结晶作用;大别山年代学
- Moreover, inherited zircon ages (581~2492 Ma) in this pluton provide evidence for the exiting of an early Precambrian crystalline basement and multistage evolution of crust in this region. 此外,获得多组继承/捕虏锆石年龄值(581~2492Ma),为本区存在早前寒武纪变质结晶基底及华南陆壳具多阶段生长演化特征提供了佐证。
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- 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。
- The child is at an impressionable age. 这孩子正处于易受影响的年龄。