Sr-isotope analysis of speleothems by LA-MC-ICP-MS: High temporal resolution and fast data acquisition
Sr-isotope analysis of speleothems by LA-MC-ICP-MS: High temporal resolution and fast data acquisition
复制标题
通过 LA-MC-ICP-MS 对洞穴沉积物进行 Sr 同位素分析:高时间分辨率和快速数据采集
DOI:
10.1016/j.chemgeo.2017.08.012
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发表时间:
2017
期刊:
影响因子:
3.9
通讯作者:
Scholz
中科院分区:
文献类型:
--
作者:
Wassenburg;Jochum;Breitenbach;Scholz
Speleothems are well established climate archives. A wide array of geochemical proxies, including stable isotopes and trace elements are present within speleothems to reconstruct past climate variability. However, each proxy is influenced by multiple factors, often hampering robust interpretation. Sr isotope ratios (87Sr/86Sr) can provide useful information about water residence time and water mixing in the host rock, as they are not fractionated during calcite precipitation. Laser ablation multi-collector-inductively coupled plasma mass spectrometry (LA-MC-ICP-MS) has rarely been used for determination of Sr isotope signatures in speleothems, as speleothems often do not possess appropriately high concentrations of Sr to facilitate this analysis. Yet the advantages of this approach include rapid data acquisition, higher spatial resolution, larger sample throughput and the absence of chemical treatment prior to analysis. We present LA-MC-ICP-MS Sr isotope data from two speleothems from Morocco (Grotte de Piste) and India (Mawmluh Cave), and we compare linescan and spot analysis ablation techniques along speleothem growth axes. The analytical uncertainty of our LA-MC-ICP-MS Sr data is comparable to studies conducted on other carbonate materials. The results of both ablation techniques are reproducible within analytical error, implying that this technique yields robust results when applied to speleothems. In addition, several comparative measurements of different carbonate reference materials (i.e. MACS-3, JCt-1, JCp-1), including tests with standard bracketing and comparison of the87Sr/86Sr ratios with a nanosecond laser ablation system and a state-of-the-art femtosecond laser ablation system, highlight the robustness of the method.
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影响因子:
3.9
作者:
A. Avigour;M. Magaritz;A. Issar;M. H. Dodson
通讯作者:
A. Avigour;M. Magaritz;A. Issar;M. H. Dodson
DOI:
10.3929/ethz-b-000122570
发表时间:
2016
期刊:
--
影响因子:
--
作者:
Hoffmann, Dirk L.
通讯作者:
Hoffmann, Dirk L.
影响因子:
1.6
作者:
T. Ohno;T. Hirata
通讯作者:
T. Ohno;T. Hirata
影响因子:
3.9
作者:
Goede, A;McCulloch, M;Hawkesworth, C
通讯作者:
Hawkesworth, C
影响因子:
3.8
作者:
Jochum, Klaus Peter;Wilson, Steven A.;Woodhead, Jon D.
通讯作者:
Woodhead, Jon D.