地质年龄

根据地质年龄因素推断其初始锶同位素比值变化范围为0.702735～0.719028；

The initiate Sr ratios inferred by the isotope geological age ranges from 0.702735 to 0.719028 ;

利用辉钼矿中Os/Re比值计算同位素地质年龄的方法

Methods for calculation of isotope geological age by using of the os / re ratio in Molybdenite

莲花山钨矿区K-Ar同位素地质年龄

K-Ar dating of Lianhuashan tungsten ore deposit

结果表明，古剂量值随着地层深度的增加而呈增长趋势，说明利用ESR方法测定低温Al心可获得老于20万年的碎屑沉积物的地质年龄。

The paleo-dose increases with the depth of loess without saturation , and this indicates that ESR dating with Al centers might be used to evaluate the ages of sediments older than 200000 years .

对其进行全岩RbSr等时线法测年，获得797.7±1.5Ma的地质年龄，揭示苏胶造山带于新元古代中期已开始向裂解转化。

The age of ( 797.7 ± 1.5 ) Ma , which is based on the Rb Sr isochron method of whole rock , indicates that the Su jiao orogenic belt began to split from mid Neoproterozoic .

铷-锶稀释法测定地质年龄

Measurements of the isotopic ages by RB - Sr dilution technique

鄂西北同位素地质年龄数据信息分析

Information analysis of isotopic geology age data from northwestern Hubei

钐钕分离的化学方法及其在同位素地质年龄中的应用

Chemical methods for Sm-Nd separation and its application in isotopic geological dating

同位素地质年龄受热扰动后的校正

The correction of isotopic age suffering thermal disturbance

辽河盆地中、新生代火山岩及其钾&氩同位素地质年龄测定

The distribution of volcanic rocks in Meso-Cenozoic in Liaohe Basin and their isotopic datings on k-at

石桥岩群是一套浅变质的正常沉积碎屑岩，同位素地质年龄（620±22）Ma。

Shi qiao rock clusters are a suit of shallow metamorphised clastic rocks of normal sedimentation with an isotopic geological age of ( 620 ± 22 ) Ma .

本文用地貌测量统计方法对我国北京、云南大理和陕西华山等地区基本已知地质年龄的地震断层陡坎进行了研究。

We have studied some fault-scarps in the areas of Beijing , Dali in Yunnan Province and the Hua mountain in Shanxi Province by the statistical method of geomorphologic survey .

本文从岩石组合、沉积建造、变质作用特征、同位素地质年龄资料等方面，与前人已建立的会理群、盐边群、河口群、康定群进行了详细对比与分析。

A detailed correlation is made between it and the Huili , Yanbian , Hekou and Kangding Groups established by the predecessors in respect to the rock associations , sedimentary formations , metamorphism and isotopic ages .

含稀有、稀土花岗岩型矿床是受地洼构造控制成矿的，成矿岩体产于中生代燕山期，根据同位素地质年龄测定资料大致在180&70×10~6年，矿床类型可归纳为六种；

The metallization of the Nb-Ta and rare earth ore deposits of granite type is controlled by diwa tectonic structures . The ore-bearing granite rocks occur in Yanshanian stage of Mesozoic-Cenozoic . The K-Ar dating of mineralization is from 180 to 70 m.

用铀系法测定年轻地质体的年龄

Uranium - series dating of young geologic bodies

用钾-氩法求地质事件真实年龄的方法探讨

New formulae to calculate the real age of geological event by potassium - argon dating

据地质和同位素年龄资料，推断走滑剪切运动发生在喜山期。

The geological data and isotopic dating suggest that the strike slip event took place during Himalayan movement .

但由于缺少直接或间接的地质证据及同位素年龄资料，故其时代问题一直悬而未决。

In the past , it was are short of the geologic evidences and isotopic age data , the geochronologic determination unresolved .

同位素地质年代学是测量年龄，利率，和历史或行星的地质资料的一门科学，运用这些见解的过程和现象可以了解地球与行星科学系。

Geochronology is the science of measuring ages , rates , and histories of geologic or planetary materials , and using these insights to understand processes and phenomena in earth and planetary science .

据野外地质观察、同位素地质年龄测定、孢粉分析及微量元素测定等成果的综合研究，论证了灌阳县城郊紫红色岩系为第四纪沉积的岩溶岩系。

Based on the geological observation , the determination of geological age by isotopes , the sporopollen analysis and the geochemical analysis of trace element , the author demonstrates that the purple rock series in the suburbs of Guanyang is the karst rock series of the Quaternary period .

本文论述了区内英云闪长岩的地质特征及岩石学、岩石化学、稀土元素特征和U-Pb同位素地质年龄。

In this paper the authors discuss their characteristics in terms of geology , petrology , petrochemistry , REE and U Pb isotopic age .

前人已建立的地质定年方法（同位素法、古生物法和古地磁法）给出的是地质事件的绝对年龄或相对年代。

The geologic dating methods , which include the paleontology method , archeomagnetism method , and isotopic method , present absolute ages or relative ages of geologic events .