Dissolution methods for strontium isotope stratigraphy: whole rock analysis

被引：130

作者：

Bailey, TR ^{[1
]}

McArthur, JM

Prince, H

Thirlwall, MF

机构：

[1] Royal Holloway Univ London, Dept Geol, Egham TW20 0EX, Surrey, England

[2] UCL, Dept Geol Sci, London WC1E 6BT, England

来源：

CHEMICAL GEOLOGY | 2000年 / 167卷 / 3-4期

关键词：

strontium isotope stratigraphy; whole rock; leaching;

D O I：

10.1016/S0009-2541(99)00235-1

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：

The preparation of samples for strontium isotope stratigraphy (SIS) by whole rock dissolution results in contributions of Sr from contaminant phases as well as from the target carbonate phase. Here we highlight and quantify the errors in Sr-87/Sr-86 values that might result when calcium carbonate is dissolved using an inappropriate method. We report the variation in Sr-87/Sr-86 value of Sr released from four samples of differing calcite content and degrees of cementation, when subject to different methods of dissolution. We show that errors of up to +/-0.000076 in Sr-87/Sr-86, which correspond to errors of +/-3.68 Ma in age, can be avoided by careful preleaching of the samples. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：313 / 319

页数：7

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