dating of rock

Age dating of lacustrine deposits in the Ningjinbo area, Shijiazhuang, North China Plain.;

华北平原石家庄东南部宁晋泊地区湖相地层的年龄测定

Especially,the peak of 240 ℃ can be used to dating.

天然石膏的热释光特征可与硬石膏的相对比,为石膏样品的年龄测定提供了实验依据。

A new technique of optical luminescence (OL) dating using the characteristic wavelength of a crystal is introduced.

首先是采用 BG1999光释光谱仪选定激发光源 ,确定释放光子的频率 ,再用矿物的特征光释光谱作年龄测定。

the epigenetic geological evidence, the relation between gold and uranium metallogenesis, the hydrogen isotopic analysis of gold-bearing mineral inclusion and the age determination by 89Ar-40Ar method.

本文从后生成矿的宏观地质证据,金铀成矿关系,含金矿物包裹体的氢氧同位素分析和~(39)Ar-~(40)Ar法年龄测定四个方面研究了金的成矿年龄,证明该类型矿床金成矿与成岩间存在一个很大的时差,金成矿作用发生很晚,在新生代新老第三纪的交替时期。

There are seven tectonic events in the system of the Longmen Mountain West Sichuan Foreland Basin, depending on the Ar Ar dating, zircon and apatite fission track analyses and dating, ESR dating and computer modeling.

通过对构造事件形成的产物 (岩浆岩、各种矿物等 )进行氩 -氩年龄测定、裂变径迹年龄测定、ESR年龄测定和计算机模拟 ,得出龙门山造山带 -川西前陆盆地系统自印支期以来 ,共发生了 7次构造事件 :(1)卡尼期末的构造事件 (D1 ) ,形成 S1 和 F1 ,并有区域低温动热变质作用 ;(2 )诺利期末的构造事件 (安县运动 ,D2 ) ,产生川西前陆盆地上三叠统须四段与下伏地层不整合接触和须四段砾岩的分布 ,并有较强的岩浆作用 ;(3)燕山期 (12 0～ 130 Ma,D3) ,有较强的岩浆作用和变质作用 ;(4 )喜马拉雅期 6 0 Ma左右的构造事件 (D4) ;(5 )喜马拉雅期 30～ 40Ma的构造事件 (D5 ) ;(6 )喜马拉雅期 2 0～ 2 5 Ma的构造事件 (D6 ) ;(7)喜马拉雅期 10 Ma的构造事件 (D7)。

fission track dating method

裂变径迹法年龄测定

isotopic age determination

同位素地质年龄测定

AMINO ACID DATING OF PEKING MAN AND DINGCUN MAN

北京猿人和丁村人的氨基酸年龄测定

Age determination data indicate episodic crystallization of uranium minerals.

年龄测定数据表明，铀矿物有着不同期的结晶。

Fission track dating of Cenozoic strata in Linxia Basin

临夏盆地新生代地层裂变径迹年龄测定

An Investigation on Thermoluminescence Dating of the Step Terrace Sediments of Guangdong Coastal Rivers

广东沿海河流阶地沉积物热释光年龄测定研究

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。

radiocarbon 14 dating method

放射性碳14测定年龄法

It was dated by the potassium-argon method to 1. 8 million years old.

由钾―氩法测定其年龄为180万年。

Detection of uranium is needed to determine the accurate age of this star.

检测铀则需要准确判定年龄这颗恒星.

Dental age assessment using Demirjian's method on Chengdu children aged from eight to sixteen

Demirjian法测定成都地区8～16岁青少年牙龄

Absolute dating involves assessing the actual age of a specimen by using some reliable measure to time.

另一种是绝对年龄，通过测量可靠的时间来确定样品的真实年龄。

New Dating of the Piaotang Granite and Related Tungsten Mineralizationin Southern Jiangxi

赣南漂塘钨矿花岗岩成岩年龄与成矿年龄的精确测定

Relative dating assesses the age of a specimen in comparison to other specimens.

一种是测定相对年龄，通过与其他的样品的比较来确定待测样品的年龄。

Determination and Analysis on the Content of Pb in People?s Hair of 3 Age Groups in Hanzhong City, Shanxi Province

汉中市三组年龄段人群发Pb含量测定分析

DETERMINATION OF ~(129)I AGES FOR GROUNDWATER WITH SUPERSENSITIVE ACCELERATOR MASS SPECTROMETRY(AMS)

超灵敏加速器质谱计测定地下水~(129)Ⅰ年龄方法

Determination of the Ore-forming Age of Gold Deposits in Xiaoshan, Western Henan and Its Geological Significance

豫西崤山地区金矿成矿年龄的测定及其意义

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