岩矿测试2012，Vol.31Issue(1)：24-28,5.
矿物中4He同位素提取和含量测定研究
Study on 4He Isotope Extraction and Quantitative Measurements in Minerals
胡志中 1杨波 1杜谷 1任静 1王冠1
作者信息
- 1. 成都地质矿产研究所,四川成都610081
- 折叠
摘要
Abstract
As an effective low-temperature thermochronometer method, the (U-Th)/He dating technique is currently widely applied in geological research. The efficient extraction and accurate content determination of 4He in minerals are key for the ( U-Th)/He dating technique. This paper introduces the laboratory extraction methods of He in minerals and the He content-determination method in Chengdu Institute of Geology and Mineral Resources. Apatite and zircon are the most common minerals for ( U-Th) /He dating, while magnetite, olivine, goethite and garnet are used less for (U-Th)/He dating. There are some routine methods for 4He extraction and U, Th content determination. The resistance furnace heating method and laser heating method 4He extraction from minerals are introduced, and the latter method being more commonly applied because of the fast analysis and low He background. In Chengdu Institute of Geology and Mineral Resources, the laser heating method and the quadrupole mass spectrometer are used to extract and determine the 4He content in apatite. This paper describes the 4He content determination process, calculation and correction method adopted for apatite samples. Furthermore, the alternative minerals should be tested for ( U-Th)/He dating to attempt to improve the routine analysis methods.关键词
(U - Th)/He定年/真空炉加热法/激光加热法/4He同位素含量测定Key words
( U-Th )/He dating/ resistance furnace heating method/ laser heating method/ quantitative measurement of 4He isotope分类
天文与地球科学引用本文复制引用
胡志中,杨波,杜谷,任静,王冠..矿物中4He同位素提取和含量测定研究[J].岩矿测试,2012,31(1):24-28,5.
