Logo do repositório

RM - Comunicações em actas de encontros científicos internacionais

URI permanente para esta coleção:

http://hdl.handle.net/10400.9/110

Navegar

Percorrer RM - Comunicações em actas de encontros científicos internacionais por autor "Albardeiro, Luís"

A mostrar 1 - 1 de 1
  • Preliminary Integrated Analysis of Magnetic Susceptibility, Geochemistry, and Mineralogy in the Neves Corvo VMS District (MAQSIMAL Project)
    Publication . Represas, Patricia; Batista, Maria Joao; Albardeiro, Luís; Marques, Fábio; Silva, Teresa; Carvalho, João; Xavier Matos, João Manuel
    ABSTRACT: The MAQSIMAL project develops a multimodal airborne quantum-sensor prototype that simultaneously measures the 3D magnetic field, magnetic-field gradients and electromagnetic responses to improve sustainable mineral exploration. The Neves–Corvo mining district (Iberian Pyrite Belt, Portugal), a largely concealed volcanogenic massive sulphide (VMS) system, was selected as a test site to compare prototype data with existing geological and drilling information. This extended abstract reports initial surface-sample characterisation integrating magnetic susceptibility (KT-10; ∼150 outcrops), XRD mineralogy and portable XRF geochemistry (20 samples). Susceptibility values are strongly right-skewed (0–5.81×10−3 SI) and vary systematically with lithology: mafic volcanic rocks show the highest and most variable responses, whereas felsic volcanic, sedimentary and strongly sericitic/argillic rocks are consistently magnetically weak, consistent with magnetite destruction and/or dilution during alteration. XRD identifies alteration minerals (chlorite, sericite, kaolinite) and pXRF data differentiate mafic versus metasedimentary compositions and show a moderate sample-scale correlation between susceptibility and total Fe (r≈0.49). The combined datasets provide an internally consistent basis for early sensor calibration and motivate expanded paired sampling and spatial mapping to better link surface signatures with subsurface VMS-related lithologies and alteration.
    2026-09-20Documento de conferência Acesso aberto Ver mais