EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Chemical Analysis of Trace Elements at the Nanoscale in Samples Recovered from Laser-Heated Diamond Anvil Cell Experiments

Ingrid Blanchard1, Sylvain Petitgirard2, Vera Laurenz3, Nobuyoshi Miyajima3, Max Wilke1, Dave Rubie3, Sergey S. Lobanov4, Louis Hennet5, Wolfgang Morgenroth1, Rémi Tucoulou6, Valentina Bonino6, Xuchao Zhao7, and Ian Franchi7
Ingrid Blanchard et al.
  • 1Institut für Geowissenschaften, Universität Potsdam, 14476 Potsdam, Germany
  • 2ETH Zürich, 8092 Zürich, Switzerland
  • 3Bayerisches Geoinstitut, Universität Bayreuth, 95440 Bayreuth, Germany
  • 4GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
  • 5ICMN, CNRS and University of Orleans, 45071 Orléans, France
  • 6ESRF - The European Synchrotron, 38043 Grenoble, France
  • 7School of Physical Sciences, Open University, Milton Keynes MK7 6AA, UK

High pressure and high temperature experiments performed with laser-heated diamond anvil cells (LH-DAC) are being extensively used in geosciences in order to study matter at conditions prevailing in planetary interiors. Due to the size of the apparatus itself, the samples that are produced are extremely small, on the order of few tens of micrometers. There are several ways to analyze the samples and extract physical, chemical or structural information, using either in situ or ex situ methods. Here, we will compare two nanoprobe techniques, namely nano X-ray fluorescence (nano-XRF) and Nanoscale secondary ion mass spectrometry (NanoSIMS), that can be used to analyze samples synthetized in LH-DAC and recovered using Focused Ion Beam. The two techniques are very different in various aspects, the most important one being that nano-XRF is a deeply penetrative but nondestructive method, whereas NanoSIMS is a surface sensitive and destructive method. The second major difference between the two techniques is that NanoSIMS can probe isotopes, whereas nano-XRF cannot. With both, it is possible to obtain the spatial distribution of chemical elements in the samples.

We used these two nanoprobes to retrieve elemental concentrations and ratios of dilute moderately and highly siderophile elements (few tens of ppm) in quenched experimental melts relevant for the formation of the core of the Earth. We will show those results and discuss the importance of proper calibration for the acquisition of quantifiable results. We have also performed metal–silicate partitioning experiments in which tungsten and molybdenum were incorporated. Those experiments are especially relevant to understand the core–mantle differentiation of the Earth, about 4.5 billion years ago. We will first present and compare metal–silicate partition coefficient obtained by both nano-XRF and NanoSIMS, and second also with results obtained independently by electron microprobe.

How to cite: Blanchard, I., Petitgirard, S., Laurenz, V., Miyajima, N., Wilke, M., Rubie, D., Lobanov, S. S., Hennet, L., Morgenroth, W., Tucoulou, R., Bonino, V., Zhao, X., and Franchi, I.: Chemical Analysis of Trace Elements at the Nanoscale in Samples Recovered from Laser-Heated Diamond Anvil Cell Experiments, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-13173,, 2022.


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