Published 2024 | Version 1
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Strontium (Sr) and Neodymium (Nd) isotopic ratios of Mt. Etna bulk rocks 2013-2017 (BRET_ISO_2013_2017)

Creators

  • 1. Istituto Nazionale di Geofisica e Vulcanologia (INGV)
  • 2. University of Naples Federico II

Contributors

  • 1. University of Naples Federico II
  • 2. Istituto Nazionale di Geofisica e Vulcanologia (INGV)

Description

The database includes 87Sr/86Sr and 143Nd/144Nd isotopic ratios measured on bulk rocks of lava and pyroclasts sampled at Etna during 2013-2017 INGV-OE monitoring activity.

Methods (English)

The chemical treatment of the samples was carried out in the clean laboratory of the INGV-OV. Before chemical dissolution whole rock have been dissolved with high-purity HF–HNO3–HCl mixtures. Sr and Nd have been separated from the matrix through conventional ion-exchange chromatographic procedures, described in detail in Arienzo et al. (2013, 2014).

Technical info (English)

Isotopic ratios have been measured by thermal ionization mass spectrometry (TIMS), using a Triton Plus® (Thermo Scientific) solid-source multicollector mass spectrometer in static mode. The blank was negligible considering the average Sr content of the samples; no determinations for Nd blanks was performed. Measured 87Sr/86Sr and 143Nd/144Nd ratios have been normalized for within-run isotopic fractionation to 88Sr/86Sr =8.375209 and 146Nd/144Nd =0.7219 respectively, using an exponential law for correction. During collection of isotopic data, replicate analyses of NIST-SRM 987 and JNdi-1 international reference standards have been performed to check for external reproducibility. During the period of analysis, the mean measured value (Goldstein et al., 2003) of 87Sr/86Sr 265 Sr for NIST-SRM 987 was 0.710242±0.000013 (2σ, where σ is the standard deviation of the values; n=48); that of 143Nd/144Nd for JNdi-1 was 0.512105±0.000007 (2σ, n=20) at Osservatorio Vesuviano. Sr and Nd isotope ratios of the samples have been normalized to the recommended values of NIST-SRM 987 and JNdi-1 (87Sr/86Sr 269 =0.710248; 143Nd/144Nd =0.512107; Zhang and Hu, 2020), respectively.

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Additional details

Identifiers

DOI
10.13127/etna/bret_iso_2013_2017

Dates

Collected
2013-02-19/2017-04-19
Valid
2013-02-19/2017-04-19