3D Constrained Gravity Inversion and TEM, Seismic Reflection and Drill-Hole Analysis for New Target Generation in the Neves–Corvo VMS Mine Region, Iberian Pyrite Belt
نویسندگان
چکیده
Located in the Iberian pyrite belt, Neves–Corvo mine is a world-class massive sulfide deposit and largest operating Portugal with underground mining down to 1000 m depth focused on stockwork Cu, Zn, Pb rich ores. Gravimetric data have had leading role discovery of seven known deposits, together time-domain electromagnetic (TEM) ground data. In this work, we present results 3D constrained gravity inversion carried out legacy The inversions were using an updated density database containing approximately 142,000 measurements. A recently constructed geological model based reprocessed 2D seismic reflection, seismic, TEM geology from detailed surface mapping drill-hole data, was used constrain inversions. show multiple high-density anomalies that may indicate presence mineralization at depth. These therefore cross-checked holes previously drilled. Approximately 97% more than available drill-holes located or distance less 200 intersected mineralization. However, been drilled past particularly dense black shales rhyolitic/gabbroic rocks intersected. To increase success future drilling, gravimetric correlated spatially high-conductivity zones strong-amplitude reflections, because igneous usually weak-to-moderate conductivity column presents signature quite different We concluded some these locations represent high-quality targets consider following up drilling further exploration.
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ژورنال
عنوان ژورنال: Natural resources research
سال: 2022
ISSN: ['1573-8981', '1520-7439']
DOI: https://doi.org/10.1007/s11053-022-10081-4