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- It intruded in Upper Ordovician Shifeng Formation and is dated as 333 86Ma of U Pb concordant age of zircon, which belongs to middle stage of Variscan. 岩体侵入上奥陶统石缝组（O3s） ， 岩体的锆石U?Pb 一致线年龄333－86 Ma， 属华力西中期。
- ZIRCON U Pb AGE OF META BASIC LAVA FROM THE KUANPING ROCK GROUP,SHAANXI PROVICE 陕西宽坪岩群变基性熔岩锆石U-Pb年龄
- ~(207)Pb/~(206)Pb Age of Zircon and ~(40)Ar/~(39)Ar of Amphibole from Plagioclase Amphibolite in the Taihua Group, Luoning,Henan,China 河南洛宁太华岩群斜长角闪岩的锆石~(207)Pb/~(206)Pb和角闪石~(40)Ar/~(39)Ar年龄
- According to the relation of contact in the field and Pb Pb evaporation age of a set of zircon(2451 Ma), its diagenetic age can been ascertained the Archaeozoic Era. 根据野外接触关系和一组锆石Pb－Pb蒸发年龄（2451Ma），确定其成岩时代为太古代。
- DIRECT DETERMINATION OF THE ~(207)Pb/~(206)Pb AGE OF SINGLEGRAIN ZIRCON BY USE OF THE THERMAL EMISSION MASS SPECTROMETER 用热离子发射质谱计直接测定单颗粒锆石~(207)Pb/~(206)Pb年龄
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- 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
- I don't think he looks his age of seventy. 我感到他看起来不像70岁的人。
- Li Huimin, Li Huaikun, Lu Songnian.Ore forming age of the Dongping gold ore: The U - Pb zircon dating of the hydrothermal zircon in the ore vein[J].Journal of Earth, 1997, 18(Sup. ) : 176 - 178. [6]李惠民;李怀坤;陆松年.;用矿脉中热液锆石的U-Pb定年确定东坪金矿的成矿时代[J]地球学报;1997;18(增刊):176-178
- The age of majority is eighteen. 成年的法定年龄是18岁。
- He ran away from home at the age of thirteen. 他十三岁那年就离家出走了。
- At the age of thirty, Mary began to lose colour. 玛丽在30岁的年纪就红颜渐逝了。
- She was orphaned at the age of ten. 她在十岁时成为孤儿。
- My father retired at the age of 60. 我父亲六十岁时退休了。
- My grandmother got married at the age of seventeen. 我的祖母十七岁就结婚了。
- Minerals or altered minerals such as sericite, biotite and K feldspar in the altered wallrocks are selected to be objects of age determination, and the Ar Ar, K Ar, Rb Sr, U Pb isochron dating methods are adopted. 选用矿石或蚀变围岩中的绢云母、黑云母、钾长石等蚀变矿物作为测年对象 ,采用 Ar- Ar、 K- Ar法或 Rb- Sr等时线法测年在目前的技术条件下是经济可行的 ,关键是要保证被测矿物确为蚀变矿物并且纯度较高。 用 U- Pb法测定矿脉中的水热锆石来确定成矿年龄 ,但如何区分继承锆石和水热锆石尚不成熟。
- He was already balding at the age of 25. 他25岁就秃顶了。
- Cole popped off at the age of twenty. 科尔在二十岁时突然死去。
- He lived to be [to the age of]80. 他一直活到了80岁。
- The average age of the students is 19. 学生的平均年龄是19岁。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
