From Aspirin to “the Bin” in a Mere 85 years

Trickett, J.C.; Düweke, W.; Linzer, Lindsay; Kock, Schalk; Tootal, Kevin

doi:10.3997/2214-4609-pdb.241.trickett_paper1

Cited by 6 publications

(1 citation statement)

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“…The impedance contrasts in the area are attributed mostly to the litho‐structural boundaries (dykes, faults and IRUPs) and magmatic layering. Previous research conducted in the study area using reflection seismic data and synthetic modelling drilled cores had reported the range of P‐wave velocities in the BC between 5500 and 6800 m/s (Trickett et al., 2009; Campbell, 2011; Scheiber‐Enslin & Manzi, 2018; Manzi et al., 2019). Generally, the CZ is characterized by alternating sub‐horizontal strata of anorthosites and norites, and ultramafic pyroxenites with intercalated chromitite seams, which include the targeted pyroxenite–chromitite UG2 package.…”

Section: Geophysical Methodsmentioning

confidence: 97%

Integration of in‐mine seismic and GPR surveys to gain advanced knowledge of Bushveld Complex orebodies

Onyebueke,

Manzi,

Rapetsoa

et al. 2023

Near Surface Geophysics

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Improving the exploration of deep‐seated mineral deposits and assessing the stability of the mine pillars require that geophysical techniques are deployed in a fast and cost‐effective manner with minimal environmental impact. This research presents results from in‐mine reflection seismic experiments and a Ground Penetrating Radar (GPR) survey conducted at Maseve platinum mine, South Africa. The research aims to develop and implement methods to image Platinum Group Metal (PGM) deposits and geological structures near mine tunnels and assess the stability of pillars. The seismic experiments were conducted using a sledgehammer source (10 lb), conventional cabled geophones (14 Hz), and a landstreamer with 4.5 Hz vertical component geophones. The GPR survey was conducted using a Noggin 500 GPR system with 500 MHz centre frequency. An image of the underlying orebody and geological structures down to 100 m from the mine tunnel floor (∼ 500 m below ground surface) was produced. We correlated the coherent reflections beneath the tunnel floor with a known Upper Group (UG2) PGM orebody. The final seismic section shows that the UG2 mineralisation is dissected by near‐vertical dykes, faults and fractures. These structures, faults in particular, are interpreted to have been active post‐mineralisation, implying that they may have contributed to the current complex geometry of the deposit. Four GPR profiles were collected around a stability pillar adjacent to the seismic lines. The radargram sections were processed to improve the S/N. The results show different patterns of fracturing and stress‐ induced structures. Perhaps, these fracturing were shown to be subvertical and constituted complex micro‐structures within the pillar, which could compromise the pillar stability and integrity. The study demonstrates that in‐mine seismic and GPR surveys can be cost‐effective and valuable for mineral exploration.This article is protected by copyright. All rights reserved

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