<sup>40</sup>K-<sup>40</sup>Ca法的初步研究

王俊新; 彭子成; 刘桂建; 房明惠; 桂和荣

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⁴⁰K-⁴⁰Ca法的初步研究

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- ⁴⁰K-⁴⁰Ca法的初步研究
- A preliminary study on dating and tracing of the ⁴⁰K-⁴⁰Ca system
- 核技术 2003年第3期
- 作者机构：
  
  1. 中国科学技术大学地球和空间科学系,中国科学技术大学地球和空间科学系,中国科学技术大学地球和空间科学系,中国科学技术大学地球和空间科学系,中国科学技术大学地球和空间科学系,合肥,230026
  2. 中国科学院地球环境研究所黄土与第四纪国家重点实验室,西安710054,合肥,230026
  3. 中国科学院地球环境研究所黄土与第四纪国家重点实验室,西安710054,合肥230026,合肥230026,合肥,230026
- 作者简介：
- 基金信息：
  
  (No.ZX069)
- DOI：
  中图分类号： P597
- 纸质出版日期：2003-03-01
- 稿件说明：
移动端阅览
[1]王俊新,彭子成,刘桂建,房明惠,桂和荣.~(40)K-~(40)Ca法的初步研究[J].核技术,2003(03):197-201.

WANG Junxin1, 2 PENG Zicheng1, 2 LIU Guijian1 Fang Minghui 1 Gui Herong1 1. A preliminary study on dating and tracing of the ⁴⁰K-⁴⁰Ca system[J]. Nuclear techniques, 2003, (3): 197-201.
[1]王俊新,彭子成,刘桂建,房明惠,桂和荣.~(40)K-~(40)Ca法的初步研究[J].核技术,2003(03):197-201. DOI：

WANG Junxin1, 2 PENG Zicheng1, 2 LIU Guijian1 Fang Minghui 1 Gui Herong1 1. A preliminary study on dating and tracing of the ⁴⁰K-⁴⁰Ca system[J]. Nuclear techniques, 2003, (3): 197-201. DOI：

摘要

报道了样品中钾、钙化学分离和纯化

以及质谱测定流程的建立。测试了国家球团矿标样W7220和W7107、国家40K-40Ar法标准矿物黑云母（ZBH-25）和角闪石（ZBJ）的钾钙含量

以及国际二级钙标样Tachiti和国家钾含量标样的钙和钾同位素比值。实测结果与相应的标称值在误差范围内一致。在此基础上

用实验所得的两组黑云母和角闪石的（40Ca/42Ca）和（40K/42Ca）数据

构筑了40K-40Ca法等时线年龄为（133.532.1）Ma

此与标称值年龄132.7Ma在误差范围内一致。而所得的初始值（40Ca/42Ca）i为151.4160.003

相应的xCa 值为+26.5

示踪了该矿物组合的原岩具有陆源性质

为固体地球化学的研究提出了新的判据。

Abstract

The K and Ca contents in the national standards of pellets (W7220

W7107)

biotite (ZBH-25) and hornblende (ZBJ)

as well as

the K and Ca isotopic ratios of the national K standard and an international standard (Tachiti) have been determined by using mass spectrometry and atomic absorption spectrometry . The measured results are in agreement with the standard values within a reasonable error range. On the basis of the standard measurement

the slope of the regressive line between (40K/42Ca) and (40Ca/42Ca) data is equal to 0.068730.01732

corresponding to the age of (133.532.1)Ma

which is consistent with the 132.7Ma in the error range reported by using the 40K-40Ar method. The primitive ratio (40Ca/42Ca)i deduced from the isochrone is 151.4160.003

corresponding to +26.5 of the xCa value. It means that the original rock of the biotite and hornblende minerals appears in the terrestrial behavior.

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40K-40Ca法的初步研究

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⁴⁰K-⁴⁰Ca法的初步研究

A preliminary study on dating and tracing of the ⁴⁰K-⁴⁰Ca system