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- 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
- 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。
- 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。
- zircon U - Pb age 锆石U-Pb年龄
- zircon U - Pb geochronology 锆石U-Pb年代学
- single zircon U - Pb ages 颗粒锆石U-Pb年龄
- The U,Ba,Zn,Zr,Hf,Pb elements has been considered the indicator elements in the forming of uranium ore,and the gray gritstone is analogical indicator elements and REE characteristics with the gray rock in the forming of uranium ore. U,Ba,Zn,Zr,Hf,Pb等为铀矿的成矿指示元素; 灰色粗砂岩与含矿岩石具有相同的成矿指示元素组合和稀土元素特征;
- His years of study were useful in his job. 他多年的学习有助于他的工作。
- How much did it cost you to study abroad? 你出国深造花了多少钱？
- She secludes herself in her study to work. 她把自己关在书房里埋头研究。
- This reference book is very useful to our study. 这本参考书对我们的研究很有用。
- She will never let slip a chance to study abroad. 她绝不会错过出国学习的机会。
- 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
- Her social life get in the way of her study. 她的社交生活妨碍了学业。
- Study well and make progress every day. 好好学习，天天向上。
- She paces the whole class in English study. 她在学习英语方面为全班树立榜样。
- Chemists study the nature of gases. 有的化学家研究气体的性质。
- I have a good mind to study abroad. 我很想到国外去读书。
- An in situ zircon Hf isotopic, U-Pb age and trace element study of banded granulite xenoliths from Hannuoba basalt: Tracking the early evolution of the lower crust in the North China Craton. 汉诺坝玄武岩中条带状麻粒岩捕虏体锆石原位Hf同位素、U-Pb 定年和微量元素研究。
- It is harder to teach than (to) study. 教书比读书辛苦。
