Early pyroxene crystallisation deep below mid-ocean ridges: Supplementary data of gabbro phase mapping

The data repository contains part of the original microscopy imagery datasets from optical microscopy, electron microscopy backscattered electron (SEM-BSE), and Synchrotron X-ray fluorescence microscopy (XFM) experiments presented in the research article 'Early pyroxene crystallisation deep below mid-ocean ridges' by Teresa Ubide*, David T Murphy, Robert B Emo, Michael Jones, Marco Acevedo Zamora, and Balz S Kamber (in prep.)

Specifically, it includes the QuPath software (Bankhead et al., 2017) project including rock (mid-ocean ridge olivine gabbro) thin sections 81-R5w and 80-R6w. The project contains the semantic image segmentation outputs generated with the Pixel Classifier and MatLab script described in Acevedo Zamora et al. 2023 and provided in the code repository.

Sample 80-R6w was segmented using image annotations in QuPath and an input comprising a false-colour Cr-Ti-Ca XFM image, cross-polarised light maximum intensity (XPL-max), and plane-polarised light (PPL-0 degrees) photomicrographs.

Similarly, Sample 81-R5w used a false-colour Cr-Ti-Ca XFM image, deep sparse autoencoder image representation of XFM (after Acevedo Zamora et al., 2024), cross-polarised light (XPL-0 degrees), plane-polarised light (PPL-0 degrees) photomicrographs, and recoloured SEM-BSE (after Acevedo Zamora et al. 2023). 

The segmentation of both samples provided a conservative estimate of the locations of relict clinopyroxene cores (~4% volume of cpx mask), mantles, and rims in a similar phase map colour scheme for better comparison.

If there are questions regarding the utilisation of the data, contact [e-mail]