An improved method for extracting marine sediment fractions and its application to Sr and Nd isotopic analysis

被引：251

作者：

Bayon, G ^{[1
]}

German, CR ^{[1
]}

Boella, RM ^{[1
]}

Milton, JA ^{[1
]}

Taylor, RN ^{[1
]}

Nesbitt, RW ^{[1
]}

机构：

[1] Southampton Oceanog Ctr, Southampton SO14 3ZH, Hants, England

来源：

CHEMICAL GEOLOGY | 2002年 / 187卷 / 3-4期

关键词：

Nd-143/Nd-144; Sr-87/Sr-86; sediment; paleoceanography; sequential leaching; ferromanganese oxides;

D O I：

10.1016/S0009-2541(01)00416-8

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 radiogenic isotopic composition of both detrital and Fe-Mn fractions in marine sediments can be used in paleoceanography to infer changes of bottom-water circulation. We have examined various chemical techniques for the analysis of Sr and Nd isotope ratios in these fractions and present a robust method that can be used to separate both the Fe - Mn oxides and the detrital fraction from a marine sediment sample for isotopic analysis. Our sequential leaching procedure involves the use of 10% acetic acid, followed by I M hydroxylamine hydrochloride in 25% acetic acid to remove the carbonate component and the Fe-Mn oxide fraction, respectively. The applicability of our chemical procedure is illustrated with examples from a marine sediment core raised from the northern Cape Basin, southeast Atlantic Ocean. (C) 2002 Elsevier Science B.V All rights reserved.

引用

页码：179 / 199

页数：21

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