Performance of CRONUS-P - A pyroxene reference material for helium isotope analysis

Joerg M. Schaefer, Gisela Winckler, Pierre Henri Blard, Greg Balco, David L. Shuster, Ronny Friedrich, A. J.T. Jull, Rainer Wieler, Christian Schluechter

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Helium isotope analyses are central to modern earth science and measured by many noble gas laboratories around the globe (Burnard, 2013; Wieler et al., 2002), spanning a wide spectrum of fundamental research - from identifying primordial reservoirs in the Earth mantle to paleoclimate reconstructions. The CRONUS-Earth initiative included the manufacturing, distribution and analysis of a pyroxene reference material (CRONUS-P) that was designed to be useful for internal reliability control of 3He measurements within a few percent and potentially for 4He on a higher level of uncertainty.This short paper describes the CRONUS-P material and its performance as 3He and 4He reference sample for noble gas laboratories. The companion paper by Blard et al. 2015 describes in depth the inter-laboratory helium isotope experiment within CRONUS-Earth.We show normalized helium isotope data of CRONUS-P measured at three different noble gas laboratories. Data from all three laboratories show no relation between helium isotope concentrations and sample mass, implying that the material is homogeneous. The data show that CRONUS-P is useful as an internal standard for 3He within better 2% (1σ) and for 4He within better 10%.

Original languageEnglish (US)
Pages (from-to)237-239
Number of pages3
JournalQuaternary Geochronology
StatePublished - Feb 1 2016


  • CRONUS-Earth
  • Cosmogenic helium-3
  • Helium isotopes
  • Pyroxene
  • Reference material

ASJC Scopus subject areas

  • Geology
  • Stratigraphy
  • Earth and Planetary Sciences (miscellaneous)


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