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Title: Towards successful cleaning of chert samples for improved 10Be and 26Al measurements

Abstract

In situ-produced cosmogenic 10Be and 26Al measurements are widely applied in geomorphological studies and in archaeology and paleoanthropology as a chronologic tool applicable to the past 5 Ma. While most of these measurements are made from concentrates of quartz, a ubiquitous and resistant mineral, it is of great interest to extend this method to other silicates and particularly to the amorphous silicates whose purification may not be as straightforward. This paper presents a cleaning procedure that has been applied on ten samples of various siliceous rocks (chert, granite and quartzolite). The aim is to monitor the 10Be, 27Al and 26Al concentration evolution as a function of cleaning steps. While this protocol appears suitable for 10Be, when measuring 26Al careful attention should be paid to 27Al, whose concentration should be measured regularly to ensure that a constant value is achieved and most important, allowing measuring 26Al/ 27Al by AMS.

Authors:
 [1];  [2];  [3];  [1];  [1];  [1]
  1. Aix-Marseille Univ., and CNRS, Marseille (France). CEREG
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Hebrew Univ. of Jerusalem (Israel)
  3. Hebrew Univ. of Jerusalem (Israel)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1548380
Report Number(s):
LLNL-JRNL-745527
Journal ID: ISSN 0168-583X; 930053
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Additional Journal Information:
Journal Volume: 456; Journal Issue: C; Journal ID: ISSN 0168-583X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
Beryllium; Aluminum; Cosmogenic; Silicate; ASTER

Citation Formats

Régis, Braucher, Alan J., Hidy, Ari, Matmon, Didier, Bourlès, Georges, Aumaître, and Karim, Keddadouche. Towards successful cleaning of chert samples for improved 10Be and 26Al measurements. United States: N. p., 2019. Web. doi:10.1016/j.nimb.2019.03.030.
Régis, Braucher, Alan J., Hidy, Ari, Matmon, Didier, Bourlès, Georges, Aumaître, & Karim, Keddadouche. Towards successful cleaning of chert samples for improved 10Be and 26Al measurements. United States. doi:10.1016/j.nimb.2019.03.030.
Régis, Braucher, Alan J., Hidy, Ari, Matmon, Didier, Bourlès, Georges, Aumaître, and Karim, Keddadouche. Sat . "Towards successful cleaning of chert samples for improved 10Be and 26Al measurements". United States. doi:10.1016/j.nimb.2019.03.030.
@article{osti_1548380,
title = {Towards successful cleaning of chert samples for improved 10Be and 26Al measurements},
author = {Régis, Braucher and Alan J., Hidy and Ari, Matmon and Didier, Bourlès and Georges, Aumaître and Karim, Keddadouche},
abstractNote = {In situ-produced cosmogenic 10Be and 26Al measurements are widely applied in geomorphological studies and in archaeology and paleoanthropology as a chronologic tool applicable to the past 5 Ma. While most of these measurements are made from concentrates of quartz, a ubiquitous and resistant mineral, it is of great interest to extend this method to other silicates and particularly to the amorphous silicates whose purification may not be as straightforward. This paper presents a cleaning procedure that has been applied on ten samples of various siliceous rocks (chert, granite and quartzolite). The aim is to monitor the 10Be, 27Al and 26Al concentration evolution as a function of cleaning steps. While this protocol appears suitable for 10Be, when measuring 26Al careful attention should be paid to 27Al, whose concentration should be measured regularly to ensure that a constant value is achieved and most important, allowing measuring 26Al/27Al by AMS.},
doi = {10.1016/j.nimb.2019.03.030},
journal = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms},
number = C,
volume = 456,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
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This content will become publicly available on April 13, 2020
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