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Brunswick

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Gilles Bellefleur – 1st expert on this subject based on the ideXlab platform

  • Reprocessing legacy three-dimensional seismic data from the Halfmile Lake and Brunswick No. 6 volcanogenic massive sulphide deposits, New Brunswick, Canada
    Canadian Journal of Earth Sciences, 2019
    Co-Authors: Gilles Bellefleur, Saeid Cheraghi, Alireza Malehmir

    Abstract:

    We reprocessed legacy three-dimensional (3D) seismic data from the Halfmile Lake and Brunswick areas, both of which were acquired for mineral exploration in the Bathurst Mining Camp, New Brunswick….

  • crustal scale reflection seismic investigations in the bathurst mining camp new Brunswick canada
    Tectonophysics, 2011
    Co-Authors: Saeid Cheraghi, Alireza Malehmir, Gilles Bellefleur

    Abstract:

    Abstract The Bathurst Mining Camp, northern New Brunswick, Canada contains the super giant Brunswick No. 12 massive sulphide deposit and the smaller, now abandoned, Brunswick No. 6 deposit. Discoveries of additional base metal deposits in the camp require a better understanding of geological structures at depth. To this end, reflection seismic data in the Brunswick No. 6 area were acquired along three 2D profiles in 1999, with a total length of about 30 km. We have recovered, processed and interpreted these seismic data in conjunction with petrophysical and geological data from the study area. The seismic data and the borehole geophysical data allow a better understanding of both the shallow and deep structures (to 9 km depth) in the area. The seismic data show steeply dipping structures of the Brunswick No. 6 area, many of which reach the surface and allow for correlation with the surface and borehole geological information. Finite-difference modeling of major geological formations constrained with borehole petrophysical measurements indicates good correlation between the observed seismic and the synthetic data. A sequence of seismically reflective and transparent zones indicates a thrust stack in the Brunswick No. 6 area. The contact between the reflective and transparent zones is a series of faults bringing the two units over each other. A reflective package is observed in all three profiles and correlates well with the Brunswick horizon, the key mineralized zone in the study area. The Brunswick horizon extends down to depth greater than 3 km, increasing the hope for discovery of deeper base metal deposits. Two other sets of reflections are also observed in all three profiles in the depth range of about 5–8 km. We interpret them as two sets of thrusted sheets, which could be an indication that the Brunswick belt extends down to a maximum depth of 8 km.

  • reflection seismic imaging and physical properties of base metal and associated iron deposits in the bathurst mining camp new Brunswick canada
    Ore Geology Reviews, 2010
    Co-Authors: Alireza Malehmir, Gilles Bellefleur

    Abstract:

    The Bathurst Mining Camp, northern New Brunswick, Canada is a major base-metal producing region that includes the Brunswick No. 12 and smaller past-producing Brunswick No. 6 deposit. Sustaining mining activity in the camp requires exploration of orebodies near and adjacent to existing mines. In this paper, we recovered, re-processed, modeled and interpreted a 2D high-resolution reflection seismic profile in the vicinity of the Brunswick No. 6 open pit with the aim of providing key information on the geological structures associated with mineral deposits at depth. The seismic data quality is good to excellent with numerous strong reflections in raw shot gathers, resulting from a careful survey design that included test shots and a priori considerations for the geological environment. Physical properties of lithological units and mineralized zones including gamma–gamma, conductivity, magnetic susceptibility, density and sonic data were studied from borehole geophysical measurements conducted near the mine. This helped to correlate seismic data and shows that the Brunswick Horizon, a key ore-prospecting horizon, and associated lithological contacts are strongly reflective. The results demonstrate that reflection seismic imaging has been particularly effective for imaging steeply dipping structures of the Brunswick No. 6 deposit many of which intersect the surface and thus allow for correlation with surface geology. Massive sulfides and iron formation of the Brunswick Horizon are identifiable locally within a distinctive reflective package that can be used as a broad guide in the region for the exploration of deep base-metal deposits. In several locations, a change from highly reflective to semi-transparent seismic character is explained by the presence of faults that juxtapose highly reflective lithological units with seismically transparent lithologies.

Alireza Malehmir – 2nd expert on this subject based on the ideXlab platform

  • Reprocessing legacy three-dimensional seismic data from the Halfmile Lake and Brunswick No. 6 volcanogenic massive sulphide deposits, New Brunswick, Canada
    Canadian Journal of Earth Sciences, 2019
    Co-Authors: Gilles Bellefleur, Saeid Cheraghi, Alireza Malehmir

    Abstract:

    We reprocessed legacy three-dimensional (3D) seismic data from the Halfmile Lake and Brunswick areas, both of which were acquired for mineral exploration in the Bathurst Mining Camp, New Brunswick….

  • crustal scale reflection seismic investigations in the bathurst mining camp new Brunswick canada
    Tectonophysics, 2011
    Co-Authors: Saeid Cheraghi, Alireza Malehmir, Gilles Bellefleur

    Abstract:

    Abstract The Bathurst Mining Camp, northern New Brunswick, Canada contains the super giant Brunswick No. 12 massive sulphide deposit and the smaller, now abandoned, Brunswick No. 6 deposit. Discoveries of additional base metal deposits in the camp require a better understanding of geological structures at depth. To this end, reflection seismic data in the Brunswick No. 6 area were acquired along three 2D profiles in 1999, with a total length of about 30 km. We have recovered, processed and interpreted these seismic data in conjunction with petrophysical and geological data from the study area. The seismic data and the borehole geophysical data allow a better understanding of both the shallow and deep structures (to 9 km depth) in the area. The seismic data show steeply dipping structures of the Brunswick No. 6 area, many of which reach the surface and allow for correlation with the surface and borehole geological information. Finite-difference modeling of major geological formations constrained with borehole petrophysical measurements indicates good correlation between the observed seismic and the synthetic data. A sequence of seismically reflective and transparent zones indicates a thrust stack in the Brunswick No. 6 area. The contact between the reflective and transparent zones is a series of faults bringing the two units over each other. A reflective package is observed in all three profiles and correlates well with the Brunswick horizon, the key mineralized zone in the study area. The Brunswick horizon extends down to depth greater than 3 km, increasing the hope for discovery of deeper base metal deposits. Two other sets of reflections are also observed in all three profiles in the depth range of about 5–8 km. We interpret them as two sets of thrusted sheets, which could be an indication that the Brunswick belt extends down to a maximum depth of 8 km.

  • reflection seismic imaging and physical properties of base metal and associated iron deposits in the bathurst mining camp new Brunswick canada
    Ore Geology Reviews, 2010
    Co-Authors: Alireza Malehmir, Gilles Bellefleur

    Abstract:

    The Bathurst Mining Camp, northern New Brunswick, Canada is a major base-metal producing region that includes the Brunswick No. 12 and smaller past-producing Brunswick No. 6 deposit. Sustaining mining activity in the camp requires exploration of orebodies near and adjacent to existing mines. In this paper, we recovered, re-processed, modeled and interpreted a 2D high-resolution reflection seismic profile in the vicinity of the Brunswick No. 6 open pit with the aim of providing key information on the geological structures associated with mineral deposits at depth. The seismic data quality is good to excellent with numerous strong reflections in raw shot gathers, resulting from a careful survey design that included test shots and a priori considerations for the geological environment. Physical properties of lithological units and mineralized zones including gamma–gamma, conductivity, magnetic susceptibility, density and sonic data were studied from borehole geophysical measurements conducted near the mine. This helped to correlate seismic data and shows that the Brunswick Horizon, a key ore-prospecting horizon, and associated lithological contacts are strongly reflective. The results demonstrate that reflection seismic imaging has been particularly effective for imaging steeply dipping structures of the Brunswick No. 6 deposit many of which intersect the surface and thus allow for correlation with surface geology. Massive sulfides and iron formation of the Brunswick Horizon are identifiable locally within a distinctive reflective package that can be used as a broad guide in the region for the exploration of deep base-metal deposits. In several locations, a change from highly reflective to semi-transparent seismic character is explained by the presence of faults that juxtapose highly reflective lithological units with seismically transparent lithologies.

Saeid Cheraghi – 3rd expert on this subject based on the ideXlab platform

  • Reprocessing legacy three-dimensional seismic data from the Halfmile Lake and Brunswick No. 6 volcanogenic massive sulphide deposits, New Brunswick, Canada
    Canadian Journal of Earth Sciences, 2019
    Co-Authors: Gilles Bellefleur, Saeid Cheraghi, Alireza Malehmir

    Abstract:

    We reprocessed legacy three-dimensional (3D) seismic data from the Halfmile Lake and Brunswick areas, both of which were acquired for mineral exploration in the Bathurst Mining Camp, New Brunswick….

  • Seismic investigations in the Brunswick No. 6 area, Canada – Imaging and heterogeneity
    , 2013
    Co-Authors: Saeid Cheraghi

    Abstract:

    The Brunswick No. 6 area, which is located in the Bathurst Mining Camp, New Brunswick, Canada, is the focus of this thesis. Almost a decade ago, in order to improve the understanding of the crustal …

  • crustal scale reflection seismic investigations in the bathurst mining camp new Brunswick canada
    Tectonophysics, 2011
    Co-Authors: Saeid Cheraghi, Alireza Malehmir, Gilles Bellefleur

    Abstract:

    Abstract The Bathurst Mining Camp, northern New Brunswick, Canada contains the super giant Brunswick No. 12 massive sulphide deposit and the smaller, now abandoned, Brunswick No. 6 deposit. Discoveries of additional base metal deposits in the camp require a better understanding of geological structures at depth. To this end, reflection seismic data in the Brunswick No. 6 area were acquired along three 2D profiles in 1999, with a total length of about 30 km. We have recovered, processed and interpreted these seismic data in conjunction with petrophysical and geological data from the study area. The seismic data and the borehole geophysical data allow a better understanding of both the shallow and deep structures (to 9 km depth) in the area. The seismic data show steeply dipping structures of the Brunswick No. 6 area, many of which reach the surface and allow for correlation with the surface and borehole geological information. Finite-difference modeling of major geological formations constrained with borehole petrophysical measurements indicates good correlation between the observed seismic and the synthetic data. A sequence of seismically reflective and transparent zones indicates a thrust stack in the Brunswick No. 6 area. The contact between the reflective and transparent zones is a series of faults bringing the two units over each other. A reflective package is observed in all three profiles and correlates well with the Brunswick horizon, the key mineralized zone in the study area. The Brunswick horizon extends down to depth greater than 3 km, increasing the hope for discovery of deeper base metal deposits. Two other sets of reflections are also observed in all three profiles in the depth range of about 5–8 km. We interpret them as two sets of thrusted sheets, which could be an indication that the Brunswick belt extends down to a maximum depth of 8 km.