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Janne Koornneef is an isotope geochemist studying the composition of the Earth’s mantle and the volcanic rocks derived from it. She aims to understand the processes that control the compositional variability of lavas and has a specific interest in melt- and fluid related processes within the mantle. She uses multiple isotope systems (U-series, Nd, Sr, Hf, Pb) in combination with major- and trace element chemistry of mantle and volcanic rocks to look at: (1) mantle melting rates and melt transport times (2) the influence of source heterogeneity on the melting process and lava compositions; (3) Recycling fluxes in subduction zones (4) mantle metasomatism and diamond formation processes in subcratonic mantle.


As a post-doc Janne worked on technique development using the latest generation mass spectrometer (TRITON-Plus TIMS) to measure small geological samples for their Sr, Nd and Pb isotope compositions. In collaboration with the manufacturer of the instrument she developed techniques to use the latest design 1012 and new 1013 Ohm feedback resistors that lead to a significant improvement in signal to noise ratios and therefore precision. She established the benefit of the now commercially available 1013 Ohm amplifiers over default 1011 Ohm amplifiers in multiple applications of small sample analyses (mineral inclusions in diamonds, melt inclusions in olivine, dust from ice cores etc).

Her current research is embedded in the Europlanet programme (www.europlanet-2020-ri.eu/) and she is part of the NEXUS 1492 project (www.nexus1492.eu). She supervises multiple PhD and MSc students in their research projects to apply the techniques to analyse sub ng samples. Her ERC-STG 2017 funded project "ReVolusions" that will Quantify Recycling fluxes of Earth surface materials and Volatiles in subduction zones by use of melt inclusions, will be launched in January 2018.

Visit her personal website at: www.geo.vu.nl/~jkoorn/Janne_Koornneef/Home.html

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Research Output 2008 2019

  • 22 Article
  • 5 Online publication or Website
  • 1 Abstract
  • 1 PhD Thesis - Research VU, graduation VU

Highly heterogeneous depleted mantle recorded in the lower oceanic crust

Lambart, S., Koornneef, J. M., Millet, M. A., Davies, G. R., Cook, M. & Lissenberg, C. J., 1 Jun 2019, In : Nature Geoscience. 12, 6, p. 482-486 5 p.

Research output: Contribution to JournalArticleAcademicpeer-review

oceanic crust
lower crust
crustal recycling

Isotopic variation in Semail Ophiolite lower crust reveals crustal-level melt aggregation

Jansen, M. N., Lissenberg, C. J., Klaver, M., de Graaf, S., Koornneef, J., Smeets, R. J., Macleod, C. J. & Davies, G. R., 5 Nov 2018, In : Geochemical Perspectives Letters. 8, p. 37-42 6 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access
lower crust
Open Access

Sr and Nd isotopic compositions of individual olivine-hosted melt inclusions from Hawai'i and Samoa: Implications for the origin of isotopic heterogeneity in melt inclusions from OIB lavas

Reinhard, A. A., Jackson, M. G., Koornneef, J. M., Rose-Koga, E. F., Blusztajn, J., Konter, J. G., Koga, K. T., Wallace, P. J. & Harvey, J., 20 Sep 2018, In : Chemical Geology. 495, p. 36-49 14 p.

Research output: Contribution to JournalArticleAcademicpeer-review

melt inclusion
ocean island basalt
isotopic composition
Chemical analysis

Archaean and Proterozoic diamond growth from contrasting styles of large-scale magmatism

Koornneef, J. M., Gress, M. U., Chinn, I. L., Jelsma, H. A., Harris, J. W. & Davies, G. R., 1 Dec 2017, In : Nature Communications. 8, 1, 648.

Research output: Contribution to JournalArticleAcademicpeer-review

Open Access

Activities 2013 2013

  • 1 Lecture / Presentation

Wetenschap en wetenschapsfilosofie

J.M. Koornneef (Speaker)
26 Sep 2013

Activity: Lecture / PresentationAcademic

Press / Media

Uitbarsting van Bardarbunga vulkaan op IJsland

J.M. Koornneef


1 media contribution

Press/Media: Other