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- The isotopic age of the volcanic rocks of the Mount Bowles Formation (MBF) outcropped on the eastern part of Livingston Island, South Shetland Islands, Antarctica have been remeasured by 40 Ar/ 39 Ar and laser microarea isochron age dating techniques. 采用40Ar/39Ar法和激光微区等时线方法,对南极南设得兰群岛利文斯顿岛东部产出的鲍勒斯山组火山岩重新进行了年龄测定。
- Sm-Nd isotopic age dating on tungsten oxides from precious and nonferrous metal deposits and its geological significance 贵重和有色金属矿床钨氧化钐-钕同位素定年研究及其地质意义
- Re-Os isotopic age dating of molybdenite separates from Elegen porphyry Mo (Cu)mineralized area, northwestern Alxa, western Inner Mongolia 内蒙古额勒根斑岩型钼(铜)矿化区辉钼矿铼-锇同位素年龄及地质意义
- According to the methods of apparent-pole moving Curve ancl isotopic age dating of roek, the intrusive mass was formed cluring Caledonian period instead of Yanshanian 根据视极移曲线及同位素测定岩石年龄的方法,确定岩体的形成时代为加里东期岩浆活动,以此对燕山期岩浆活动的结论提出质疑。
- isotopic age datingn. 同位素年龄测定
- U-Pb isotopic age dating 锆石U-Pb年龄
- 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。
- 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。
- The 14C age dating method was applied to study the deposited age of the Jiangbei conglomerate in Youxi profile,Jiangjin. The geochemical characteristics of oxides such as MgO,CaO,Fe2O3,FeO,Fe2O3/FeO were analyzed. 本研究采用14C法对江津油溪剖面江北砾岩胶结年代进行测定;用滴定法和原子吸收光谱仪对填隙物的Fe2O3、FeO、CaO、MgO及Fe2O3/FeO变化特征进行了分析.
- Li, 2001: Age dating of lacustrine m diments in Lake Tianshuhai of the Tibetan Plateau by using U-series isochron method and its significance.Chinese Science Bulletir46 (10): 862-866. 2007年台湾地球科学科研学术联合研讨会,2007年5月15-18日,台湾桃园中坜龙潭科技园区。
- According to data with fossils and sporopollens in underlying sediment stratigraphic and volcanic isotopic age determination,the volcanic is a lower Cretaceous equivalent of upper of Gouyang formation of Early Cretaceous. 根据其下伏沉积地层中化石和孢粉资料及火山岩同位素测年资料,白女羊盘组火山岩的时代为早白垩世,其层位相当于下白垩统固阳组的上部层位。
- The rocks and isotopic age of collisional structures in Pamir Plateau recorded the movement of Indian plate towards Asian plate, which passed through 3 stages of subduction, collision and squeezing. 帕米尔地区碰撞构造的岩石与同位素年龄,记录了印度板块对亚洲板块的运动,经历了俯冲、碰撞和榨挤3个阶段。
- 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。
- 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]
- Sr Isotopic Compositions and Age Dating of Marine Phosphates from Pacific Seamounts 太平洋海山磷酸盐的锶同位素成分及形成年代
- K-Ar isotopic ages of sulfide from ore suggest that the model age of deposit formation is 339.1 Ma,near to the Carboniferous stratum age,implying the start of sedimentary exhalative mineralization. 矿床硫化物K-Ar同位素年龄显示;矿床的模式年龄有2个年龄段:斑点状闪锌矿与结核状闪锌矿的模式年龄分别为387.;2;444
- He prefers to assort with people of his own age. 他更喜欢与自己的同龄人交往。