Trace element detection in anhydrous minerals by micro-scale quantitative nuclear magnetic resonance spectroscopy

Yunhua Fu, Renbiao Tao (), Lifei Zhang, Shijie Li, Ya-Nan Yang, Dehan Shen, Zilong Wang and Thomas Meier ()
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Yunhua Fu: Peking University
Renbiao Tao: Center for High-Pressure Science and Technology Advance Research
Lifei Zhang: Peking University
Shijie Li: Chinese Academy of Sciences
Ya-Nan Yang: Chinese Academy of Sciences
Dehan Shen: Chinese Academy of Sciences
Zilong Wang: Peking University
Thomas Meier: Center for High-Pressure Science and Technology Advance Research

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Nominally anhydrous minerals (NAMs) composing Earth’s and planetary rocks incorporate microscopic amounts of volatiles. However, volatile distribution in NAMs and their effect on physical properties of rocks remain controversial. Thus, constraining trace volatile concentrations in NAMs is tantamount to our understanding of the evolution of rocky planets and planetesimals. Here, we present an approach of trace-element quantification using micro-scale Nuclear Magnetic Resonance (NMR) spectroscopy. This approach employs the principle of enhanced mass-sensitivity in NMR microcoils. We were able to demonstrate that this method is in excellent agreement with standard methods across their respective detection capabilities. We show that by simultaneous detection of internal reference nuclei, the quantification sensitivity can be substantially increased, leading to quantifiable trace volatile element amounts of about 50 ng/g measured in a micro-meter sized single anorthitic mineral grain, greatly enhancing detection capabilities of volatiles in geologically important systems.

Date: 2024
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DOI: 10.1038/s41467-024-51131-0

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