isotopic age

Isotopic age has become an important means solving geological problems .

岩石同位素年龄已成为解决地质问题的一个重要手段。

On the isotopic age of the Cretaceous lower boundary of China

论中国白垩系底界的同位素年龄划分方案

The Understanding and Use of Rock Isotopic Age

岩石同位素年龄的理解与使用

Isotopic age of the Archean rocks in Beijing area and Their Geological Implications

北京地区太古宙岩石同位素年龄及其意义

However , many key horizons are still lacking in a highly precise isotopic age constraint .

然而，许多关键层位仍缺乏高质量同位素年龄的约束。

The correction of isotopic age suffering thermal disturbance

同位素地质年龄受热扰动后的校正

Discussion on Rational Usage of Isotopic Age Information from the Metamorphic Rocks in Northern Fujian

对闽北变质岩同位素年代信息合理使用的探讨

This suggestion is supported by a lot of obtained fossils together with data of isotopic age .

古生物化石、同位素年龄都证实了这一点。

Comment on the Isotopic Age Data of Basement Metamorphic Rocks in Cathaysia Block

华夏地块基底变质岩同位素年龄数据评述

Based on new isotopic age data , the age of the Precambrian-Cambrian boundary should now be 597 Ma .

根据同位素年龄测定的最新结果，提出前寒武系-寒武系界线年龄值为597Ma。

The main purpose of this paper is to determine the geological time according to the results of basalt isotopic age determination .

本文的主要目的是依靠玄武岩同位素年龄确定地层时代。

Its Rb - Sr isotopic age is 84 my .

其铷-锶同位素年龄为84百万年。

Isotopic age of bed g bauxite of Shansi massif and its geological significance

山西地块G层铝土矿同位素年龄及其地质意义

The age of emplacement is at Upper Paleozoic Era from the result of isotopic age determination .

依据同位素测年结果，确定其侵位时代为晚古生代晚期。

Isotopic age spectrum of the Huangling granitic batholith , western Hubei

鄂西黄陵花岗岩基同位素年龄谱

Evidence from isotopic age for presence of Mesozoic-Cenozoic magmatic activities in Altai region , xinjiang

阿尔泰地区中、新生代岩浆活动的同位素年龄证据

Nd-Sr Isotopic Age Determination of Gneiss and Its Geological Significance , Donghai Region , North Jiangsu

苏北东海地区片麻岩的Nd-Sr同位素定年及其地质意义

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岩屑长石砂岩质杂砂岩

The Ar-Ar isotopic age in Dongchuan Taoyuan type copper deposit , yunnan province and its significance

东川桃园式铜矿Ar-Ar同位素年龄及意义

U-Pb and Rb-Sr isotopic age study of the Jining Group from nel Mongol of China

内蒙集宁群变质岩系U-Pb和Rb-Sr协同位素年龄的讨论

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

Whole Rock Sb-Sr Isotopic Age of Epimetamorphic Rocks in South Sulu UHP Metamorphic Belt

苏鲁超高压变质带南部浅变质岩的全岩Rb-Sr同位素年龄

Up to now , there are no systematic geochemical studies and isotopic age for the Zhuanghe gold deposit , eastern Liaoning .

到目前为止，对辽宁庄河金矿尚没有做过系统的矿床地球化学和同位素年代学的研究。

Rb-Sr isotopic age of Panshan quartz-monzonite and it 's geological significance , Ji Xian Tianjin

天津蓟县盘山石英二长岩体的Rb&Sr同位素年龄及其地质意义

Hidden granite porphyry is of volcanic neck facies and gives isotopic age of zircon being 32 ± 0.2 Ma .

潜花岗班岩为火山颈相，其锆石U-Pb同位素年龄为32±0.2Ma。

Isotopic age values of the three belts show that they are varied in the main compressional stress direction , age of formation and development and termination time .

榴辉岩的同位素年龄值指示这3个带是主压应力方向不同、形成时期不同、发展和终止时期也各不相同的3个高压-超高压变质带。

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

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。

Discussion for the formation of Pb-Zn mineralization belt from Fengxian to Chengxian by the selection of calculated model of Pb isotopic age

由铅同位素年龄计算模式的选择探讨凤&成铅锌成矿带的形成

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

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。

A lot of isotopic age data of many significant ore deposits in China have been obtained , but a certain geologic event in the mineralization process can not be marked by them .

尽管我国好多矿床已经测得了大量同位素年龄资料，但这决不等于这些年龄数据均能标定成矿过程中某一地质事件发生的时代。