A series of the lava and the red strata up them in the west part of northern Dabie orogen were divided into Chenpeng Formation and Zhou Jiawang Formation,which belong to the early and late Cretaceous period,according to the conchostracans,the isotope age and the fossils of abundant dinosaur eggs and a few ostracodas.
大别造山带北缘西部的一套火山岩及其上的“红层”,依据叶肢介、同位素年龄值和较丰富的恐龙蛋和少量介形虫化石,从下而上划分为陈棚组、周家湾组,时代归属早、晚白垩世。
Isotope age determination results show that the age of formation is 138 Ma for the 3-d member of the Zhangjiakou group volcanic rocks and is 133 Ma for the Huajiying group rocks.
根据同位素年龄测定,冀北地区张家口组三段酸性火山岩的形成年龄为138Ma,属于上侏罗统顶部；花吉营组中基性岩石的形成年龄为133Ma,应划归下白垩统底部为宜。
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。
Large amount of isotopic age data achieved in recent 10 years in Hengshan & Wutai Mt.
近10年在恒山和五台地区所获得的大量同位素年代学资料,统计发现恒山杂岩的同位素年龄峰值比五台杂岩大致要年轻20Ma,这与恒山-五台地区为岛弧根带-岛弧关系的推论相符合。
Rock and isotopic age of the collision structures in Pamir region have recorded the movement of Indian plate toward Asian plate, which has experienced subduction and consumption of Neo-Thetys (113±1.
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,经历了新特提斯洋俯冲消减(113±1。
Rb-Sr AGE DETERMINATION ON THE LATE ARCHEAN FERROSILICEOUS ROCK SERIES IN SIJIAYING,LUANXIAN,HEBEI
河北滦县司家营晚太古代铁硅质岩系的铷-锶同位素年龄测定
A BPHA extraction method for chemical separation of Re for molybdenite Re-Os dating
一种简单的辉钼矿Re-Os同位素年龄测定中Re化学分离方法:“钽试剂”萃取法
isotopic age determination
同位素地质年龄测定
Study on the Method of Re-Os Dating for Black Shale and Oil Shale;
Re-Os同位素体系测定黑色页岩、油页岩年龄研究
Its diameter is about3000 meters, and the depth is250 meters.
它的直径约3000米，深约250米；据同位素地质年龄测定约七千万年。
a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon 14.
用放射性同位素碳14测定有机物年龄的化学分析。
Evidence from isotopic dating suggests that the greenstone belts vary considerably in age.
来自同位素年龄鉴定的证据指出，绿岩带在年龄上彼此变化相当大。
isotopic dating of marine sediment
海洋沉积物同位素年代测定
ISOTOPE AGE OF PRINCIPAL MINERALIZATION PERIOD IN URANIUM DEPOSIT No. 460
460铀矿床主要矿化期的同位素年龄
INFORMATION ANALYSIS OF ISOTOPIC GEOLOGY AGE DATA FROM NORTHWESTERN HUBEI
鄂西北同位素地质年龄数据信息分析
Researches of Reproductive Hormones in Different Age Holstein Cows
不同年龄奶牛血清六种生殖激素浓度测定及其相关性研究
D/H Ratio Determination of Cellulose Nitrate from Tree Rings;
树木年轮硝化纤维素氢同位素组成的测定
Measurement of geologic time, as through isotopic radioactive decay.
地质年代测定通过放射性同位素衰变来测定地质年代
THE EFFECT OF BACKGROUND POLLUTION ON AGE DATA IN ISOTOPE CHRONOLOGY
同位素年代学中本底污染对年龄数据的影响
A Review on the Development of Re-Os Isotopic Dating Methods and Techniques
铼-锇同位素定年方法及分析测试技术的进展
ISOTOPIC AGE OF CLASTIC GLAUCONITE ON THE CONTINENTAL SLOPE IN THE NORTHEASTERN PART OF THE SOUTH CHINA SEA
南海东北部陆坡碎屑海绿石的同位素年龄
Re-Os ISOTOPE AGES OF MOLYBDENUM DEPOSITS IN EAST QINLING AND THEIR SIGNIFICANCE
东秦岭地区钼矿床的铼－锇同位素年龄及其意义
Error Estimation of Initail Ritios of Sr-Nd Isotopic and Nd Model Age
Sr-Nd同位素初始比值和Nd模式年龄的误差估算