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1)  Bayankhongor Region
钾氩同位素年龄
2)  isotope age
同位素年龄
1.
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。
2.
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。
3)  isotopic age
同位素年龄
1.
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。
2.
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。
3.
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。
4)  Isotopic ages
同位素年龄
5)  K-Ar age method
钾氩年龄测定法
6)  K-Ar dating
钾氩法测定年龄
补充资料:氩同位素
分子式:
CAS号:

性质:O族元素。Z18。氩元素有36Ar、38Ar和40Ar三种稳定性同位素。核外电子构型都为3s23p6。相对原子质量分别为35.967545,37.962732和39.962384。天然丰度分别为0.337%、0.063%和99.60%。无色惰性气体。在空气中含量为0.93%。不自燃、也不助燃。通常用热扩散法和低温精馏法分离。在核性质的研究,岩石、矿物地质年代的测定,低温温标的建立和作为示踪剂等方面都有一定应用。常采用热扩散法和低温精馏法分离。

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