High-precision strontium isotope analysis of geological samples by thermal ionisation mass spectrometry

High-precision strontium isotope analysis of geological samples by thermal ionisation mass... We present a method for the efficient separation of Sr from geological materials followed by high-precision measurement of Sr isotopes by thermal ionisation mass spectrometry (TIMS). These analyses focus on high-precision measurements of the low abundance isotope 84Sr (0.56%), which is of high interest for cosmochemical applications. The robust dataset obtained through the analysis of a range of basalts and anorthosites sheds light on a number of issues regarding Sr isotopic analyses. Specifically, concerns that analytical artefacts may produce a spurious signal on 84Sr have been investigated. The external reproducibility, based on replicate measurements of the basalt standard BCR-2, for ε84Sr is ±0.36 (2SD), and is ±0.51 (2SD) for repeated analyses of NIST SRM-987. In contrast with the static measurements of previous work (Andreasen and Sharma, 2007; Moynier et al., 2012; Paton et al., 2013; Brennecka et al., 2013), our dynamic data reveal no 84Sr variations in terrestrial rocks or standard material. The dataset indicates that, by the analytical procedure employed, 84Sr variations in extra-terrestrial material larger than ~0.5ε are resolvable. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chemical Geology Elsevier

High-precision strontium isotope analysis of geological samples by thermal ionisation mass spectrometry

Loading next page...
 
/lp/elsevier/high-precision-strontium-isotope-analysis-of-geological-samples-by-FPIYQ084w0
Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0009-2541
eISSN
1872-6836
D.O.I.
10.1016/j.chemgeo.2018.02.010
Publisher site
See Article on Publisher Site

Abstract

We present a method for the efficient separation of Sr from geological materials followed by high-precision measurement of Sr isotopes by thermal ionisation mass spectrometry (TIMS). These analyses focus on high-precision measurements of the low abundance isotope 84Sr (0.56%), which is of high interest for cosmochemical applications. The robust dataset obtained through the analysis of a range of basalts and anorthosites sheds light on a number of issues regarding Sr isotopic analyses. Specifically, concerns that analytical artefacts may produce a spurious signal on 84Sr have been investigated. The external reproducibility, based on replicate measurements of the basalt standard BCR-2, for ε84Sr is ±0.36 (2SD), and is ±0.51 (2SD) for repeated analyses of NIST SRM-987. In contrast with the static measurements of previous work (Andreasen and Sharma, 2007; Moynier et al., 2012; Paton et al., 2013; Brennecka et al., 2013), our dynamic data reveal no 84Sr variations in terrestrial rocks or standard material. The dataset indicates that, by the analytical procedure employed, 84Sr variations in extra-terrestrial material larger than ~0.5ε are resolvable.

Journal

Chemical GeologyElsevier

Published: Apr 5, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off