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- 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。
- 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。
- Isotopic ages of the two-s tage diabase sills are 706-723 Ma and 604-654 Ma, respectively,corresponding to the early and late Sinian period. 稀土元素配分模式为轻稀土富集型,但稀土元素分馏并不强烈。
- It is located in the west fl ank of the Panxi rift, but the REE mineralization was developed in the postrift stage based on the isotopic ages and the geological environment. 四川牦牛坪矿床是世界上最大的稀土矿床之一,该矿床位于攀西裂谷西缘,同位素年龄表明稀土矿化发育于裂谷期后阶段。
- K Ar dilution and 40 Ar/ 39 Ar step heating methods have been chosen in dating the isotopic ages of the volcanic and intrusive rocks of Byers Peninsula, Livingston Island. 以K-Ar稀释法和40Ar/39Ar阶段加热法对利文斯顿岛百尔斯半岛的熔岩和次火山岩测定了同位素年龄。
- 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。
- WU Fu-yuan,GE Wen-chun,SUN De-you,et al.The Sm-Nd,Rb-Sr Isotopic ages of the Archean granites in southern Jilin Province[J].Atca Petrologica Sinica,1997,13 (4):499-506. [9]吴福元;葛文春;孙德有;等.;吉林南部太古代花岗岩Sm-Nd;Rb-Sr同位素年龄测定[J]
- 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。
- Exercise is profitable in all ages. 运动对于各年龄段都很有利。
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。
- He admires the chivalry of knights in Middle Ages. 他很佩服中世纪武士的侠义精神。
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素,尤指碳14。
- It has its roots deep in the Middle Ages. 它起源于遥远的中世纪。
- 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。
- 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