Geophysical Investigation of the Pb–Zn Deposit of Lontzen–Poppelsberg, Belgium

[en] The drillhole information from the Lontzen–Poppelsberg site has demonstrated three orebodies and has allowed the estimation of the extension of the lodes, their dip, and the location at the ground surface. The localisation of the lodes makes them excellent targets for further exploration with geophysics. This deposit is classified as a Mississippi Valley Type (MVT) deposit. It consists mainly of Pb–Zn–Fe sulphides that display contrasting values in resistivity, chargeability, density, and magnetic susceptibility, with regards to the sedimentary host rocks. The dipole–dipole direct current (DC) resistivity and induce polarization (IP) profiles have been collected and inverted to successfully delineate the Pb–Zn mineralization and the geological structures. Short-spacing EM34 electromagnetic conductivity data were collected mainly on the top of Poppelsberg East lode and have revealed a conductive body matching with the geologically modelled mineralization. Gravity profiles have been carried out perpendicularly to the lode orientation; they show a strong structural anomaly. High resolution ground magnetic data were collected over the study area, but they showed no anomaly over the ore deposits. The geophysical inversion results are complementary to the model based on drill information, and allow us to refine the delineation of the mineralization. The identification of the geophysical signatures of this deposit permits targeting new possible mineralization in the area.

Disciplines :

Geological, petroleum & mining engineering

Author, co-author :

Evrard, Maxime ; Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil

Dumont, Gael

Hermans, Thomas

Chouteau, Michel

Francis, Olivier

Pirard, Eric

Nguyen, Frédéric ; Université de Liège - ULiège > Département ArGEnCo > Géophysique appliquée

Language :

English

Title :

Geophysical Investigation of the Pb–Zn Deposit of Lontzen–Poppelsberg, Belgium

Publication date :

2018

Journal title :

Minerals

eISSN :

2075-163X

Publisher :

MDPI AG, Switzerland

Volume :

Issue :

6 233

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.mdpi.com/2075-163X/8/6/233

Available on ORBi :

since 16 June 2018

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