Nanoscale Secondary Ion Mass Spectrometry determination of the water content of staurolite.

ABSTRACT:

Rationale

Staurolite is an important mineral that can reveal much about metamorphic processes. For instance, it dominates the Fe-Mg exchange reactions in amphibolite-facies rocks between about 550 and 700°C, and can be also found at suprasolidus conditions. Staurolite contains a variable amount of OH in its structure, whose determination is a key petrological parameter. However, staurolite is often compositionally zoned, fine-grained, and may contain abundant inclusions. This makes conventional water analysis (e.g., Fourier transform infrared (FTIR) spectroscopy or by chemical titration) unsuitable. With its high sensitivity at high spatial resolution, Nanoscale Secondary Ion Mass Spectrometry (NanoSIMS) is potentially a valuable tool for determining water contents in staurolite. H

SUBMITTER: Azevedo-Vannson S 

PROVIDER: S-EPMC9540019 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature