Mineral footprints of the Paleoproterozoic sediment-hosted Abra Pb-Zn-Cu-Au deposit Capricorn Orogen, Western Australia

Mapping hydrothermal and supergene alteration zones associated with carbonate-hosted Zn-Pb deposits by using PRISMA satellite imagery supported by field-based hyperspectral data, mineralogical and geochemical analysis

“…Furthermore, an increase in the intensity of this feature was observed in association with increasing iron content in dolomites and calcites (Gaffey 1986). However, the strength of the Fe 2+ CFA feature was found to be very variable, especially when comparing it across mineral species (Hunt and Salisbury 1971;Gaffey 1986;Green and Schodlok 2016;Lampinen et al, 2019). Two less intense diagnostic absorption features in calcite occur at around 1990 nm (medium intensity) and 1870 nm (weak intensity), respectively.…”

Spectral characterization of the Umbuzeiro Doce skarn target (Brazil): insights for the exploration of a W-Mo-gemological vesuvianite system

“…Spectral technologies appear as a powerful tool for exploration projects with already observed success mainly in metalliferous systems, such as VHMS, orogenic, SEDEX, and IOCG deposits (Tappert et al 2011, Fresia et al 2017, Lampinen et al 2019, Naleto et al 2019, Ross et al 2019, Medina et al 2021. The spectral technologies, such as reflectance and imaging spectroscopy, appear as advanced remote sensing data for detailed and rapid analysis of alteration minerals, including their distribution, and the definition of spectral indices as vectoring tools to locate proximal ore sites (Bedell et al 2009).…”

XRF and hyperspectral analyses as an automatic way to detect flood events in sediment cores

“…In this study, we explore the use of short-wave infrared hyperspectral imaging (HSI) applied on the Lake Bourget (France) sediment sequence. HSI has shown potential to highlight organic matter (Butz et al, 2017;Schneider et al, 2018;Speta et al, 2018;Van Exem et al, 2018;Jacq et al, 2019b), mineral compounds (Lampinen et al, 2019;Tusa et al, 2019) and particle size (Jacq et al, 2019a) in lake sediments. The partial least squares discriminant analysis (PLS-DA) was used to discriminate event layers from continuous sedimentation, as presented in a previous study .…”