40AR/39AR DATING OF VERY FINE-GRAINED SAMPLES - AN ENCAPSULATED-VIAL PROCEDURE TO OVERCOME THE PROBLEM OF 39AR RECOIL LOSS

被引：64

作者：

FOLAND, KA ^{[1
]}

HUBACHER, FA ^{[1
]}

AREHART, GB ^{[1
]}

机构：

[1] UNIV MICHIGAN, DEPT GEOL SCI, ANN ARBOR, MI 48109 USA

来源：

CHEMICAL GEOLOGY | 1992年 / 102卷 / 1-4期

关键词：

D O I：

10.1016/0009-2541(92)90161-W

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

40Ar/39Ar dating of very fine-grained materials is compromised by the loss of 39Ar by recoil, and also sometimes other Ar isotopes, during irradiation. An encapsulated sample 40Ar/39Ar procedure is described which overcomes this problem and which produces a K-Ar equivalent date. Measurements indicate that the procedure yields reliable and reproducible results. It offers the potential for dating small amounts of material of many types, for example very fine-grained authigenic sheet silicates from rock cores, which may suffer Ar loss during irradiation.

引用

页码：269 / 276

页数：8

共 14 条

[1]

[Anonymous], 1982, NUMERICAL DATING STR, DOI DOI 10.1016/1359-0189(90)90126-I

[2]

AREHART GB, 1992, UNPUB EC GEOL

[3] ARGON DIFFUSION IN GLAUCONITE, MICROCLINE, SANIDINE, LEUCITE AND PHLOGOPITE [J].