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Updated: Jan 23, 2026

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Species diffusion in clinopyroxene solid solution in the diopside-anorthite system.

Matthias Bernhard Lierenfeld¹, Xin Zhong^1,2, Eric Reusser¹

¹1Institute of Geochemistry and Petrology, Swiss Federal Institute of Technology (ETH Zürich), Clausiusstrasse 25, 8092 Zurich, Switzerland.

Contributions to Mineralogy and Petrology. Beitrage Zur Mineralogie Und Petrologie

|June 11, 2019

Summary

This study quantifies multicomponent diffusion in diopside crystals, revealing temperature-dependent diffusion rates. The findings help date magmatic processes using clinopyroxene (cpx) phenocrysts, estimating residence times for geological events.

Keywords:

Eigenvalues Eigenvectors Multicomponent coupled diffusion Pyroxene diffusion Seed overgrowth technique

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Characterization of Thermal Transport in One-dimensional Solid Materials

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Published on: January 26, 2014

Area of Science:

Geochemistry
Mineral Physics
Petrology

Background:

Understanding diffusion in minerals is crucial for interpreting geological processes.
Diopside-anorthite (Di/An) system diffusion data is essential for petrological modeling.
Previous studies often focused on single-component diffusion, limiting complex system analysis.

Purpose of the Study:

To determine the coupled multicomponent diffusion coefficients for Ca2Si2O6, CaAl2SiO6, and Mg2Si2O6 in diopside.
To develop a method for applying diffusion data to constrain timescales of magmatic processes.
To investigate the temperature and oxygen fugacity dependence of diffusion in diopside.

Main Methods:

Preparation of diffusion couples using the seed overgrowth technique.
Element concentration profiling using a field emission gun scanning electron microscope (FEG-SEM).
Solving the multicomponent diffusion matrix by fitting eigenvalues and eigenvectors to concentration profiles.

Main Results:

Established Arrhenius-type equations for the dominant eigenvalues (λ1 and λ2) governing diffusion.
Found that eigenvectors are constant, indicating eigenvalues are the primary temperature-dependent parameters.
Calculated residence times of 0.25-1.7 years for clinopyroxene (cpx) phenocrysts in a Tertiary Adamello batholith dyke.

Conclusions:

The study provides a robust method for modeling multicomponent diffusion in minerals.
The derived diffusion data and modeling approach are applicable to natural samples, constraining magmatic timescales.
This research enhances our ability to interpret the thermal history of igneous rocks.