Frontiers paper

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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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.