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- Re Os isotopic dating Re-Os同位素测年
- Os isotopic age Os同位素年龄
- Secondly, the Os concentration and residence time in seawater, and Os isotope composition of seawater were precisely measured. 对海水中锇的浓度、滞留时间 ,以及现代海水的锇同位素组成进行了精确测定 ;
- The progresses of Os isotope in the marine environment in recent years have been summarized in this review, which may benefits our study on Os isotope in the future. 较系统地总结近年来锇同位素在海洋环境中的研究现状 ,对于指导以后的研究工作有着重要的意义
- 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。
- Precise determination of the platinum-group elements and Os isotopic ratios in low-level rock samples. 岩石样品中低含量铂族元素和锇同位素比值的高精度测量方法。
- 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。
- Molybdenite Re-Os isotope age 辉钼矿铼锇同位素年龄
- 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。
- I want to speak to you re your behaviour. [口]关于你的行为,我想跟你谈一谈。
- 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。
- Application of Negative Thermal Ionization Mass Spectromery in Os Isotope Determination 负热电离质谱技术在锇同位素测定中的应用
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- Re your letter of 1 September ... 关於您9月1日的来信 ...