Spectral proximity network of the partially averaged mass spectrometric image (40′000 mass spectra 260 single unit masses). The networks are colored according to the node degree (the degree of a node is the number of edges connected to the node).
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TL;DR
In this paper we present:
- a multi-element imaging of the Gunflint chert (2 billions years old) sample;
- the unsupervised analysis of 40′000 mass spectra, downsampled from 100'000 spectral databank, using nonlinear reduction and topological coarsening.
- hierarchical density-based clustering on node-coordinate embeddings for quantification of chemical entities
- mineralogical interpretation of the ionization profiles of given clusters.