Preprints
https://doi.org/10.5194/essd-2022-386
https://doi.org/10.5194/essd-2022-386
 
29 Nov 2022
29 Nov 2022
Status: this preprint is currently under review for the journal ESSD.

Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-Rocks – The GREENPEG Project Database

Joana Cardoso-Fernandes1,2, Douglas Santos1, Cátia Rodrigues de Almeida1,2, Alexandre Lima1,2, Ana C. Teodoro1,2, and the GREENPEG project team Joana Cardoso-Fernandes et al.
  • 1Department of Geosciences, Environment and Spatial Planning, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007 Porto, Portugal
  • 2ICT (Institute of Earth Sciences) – Porto Pole (Portugal), Rua Campo Alegre, 4169-007 Porto, Portugal
  • A full list of authors appears at the end of the paper.

Abstract. The GREENPEG spectral database contains the spectral signature, obtained through reflectance spectroscopy studies, of European pegmatites and minerals, as well as their host rocks. Samples include Nb-Y-F (NYF) and Li-Cs-Ta (LCT)-type pegmatites and host rocks from pegmatite locations in Austria, Ireland, Norway, Portugal, and Spain. The database contains the reflectance spectra (raw and with continuum removed), sample photographs, and main absorption features automatically extracted by a self-proposed Python routine. Whenever possible, spectral mineralogy was interpreted based on the continuum-removed spectra. A detailed description of the database, its content and structure, the measuring instrument, and interoperability with Geographic Information Systems (GIS) is available in this database report. Moreover, examples of how the data can be used and interpreted are also provided. The advantages and added value of the presented dataset reside on its European scale with representative samples from pegmatites with distinct genesis, mineralogy, structure, and host rocks that can be used as a reference for pegmatite exploration at a global scale through satellite image processing, for example. The reported spectral mineral assemblages can also be of interest when considering resource estimation or ore processing. Thus, it is expected that this open dataset, available on the Zenodo platform https://doi.org/10.5281/zenodo.6518319 (Cardoso-Fernandes et al., 2022), will be a reference for distinct types of users ranging from academia to industry.

Joana Cardoso-Fernandes et al.

Status: open (until 08 Feb 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Joana Cardoso-Fernandes et al.

Data sets

Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-Rocks – The Greenpeg Database Cardoso-Fernandes, J., Teodoro, A. C., Santos, D., Rodrigues de Almeida, C., & Lima, Alexandre https://doi.org/10.5281/zenodo.6518319

Joana Cardoso-Fernandes et al.

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Short summary
The GREENPEG project aims to develop tools for pegmatite exploration and enhance European databases, adding new data on pegmatite properties, such as a spectral signature. Samples comprise pegmatites and wall rocks from Austria, Ireland, Norway, Portugal and Spain. A detailed description of the spectral database is presented, as well as reflectance spectra, photographs and absorption features. Its European scale with pegmatites with distinct characteristics provides a reference for exploration.