Seismic Exploration for VMS Deposits within the Paleoproterozoic Flin Flon Belt, Trans-Hudson Orogen, Canada

Malinowski, M.; White, D.; Mwenifumbo, C J; Salisbury, Matthew H.; Bellefleur, Gilles; Schmitt, D. R.; Dietiker, B

doi:10.3997/2214-4609.20147977

Cited by 4 publications

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“…Thus, for the assessment of PS reflectivity in the Flin Flon mining camp, measurements of the S-wave velocity and density were made for a series of core samples typical for the study area (White et al, submitted for publication). In general, the measured S-wave velocities show smaller impedance contrasts between the various lithologies as compared to the P-wave velocities (Malinowski et al, 2008;White et al, submitted for publication) (see Table 2). Massive sulfides are generally characterized by the highest densities (Table 2), but their S-wave velocities depend strongly on the composition.…”

Section: Elastic Rock Properties and 2-d Forward Modelingmentioning

confidence: 89%

“…Acquisition parameters are summarized in Table 1. Processing of the vertical-component data for P-wave reflections (Malinowski et al, 2008) reveals prominent reflectivity Table 2). Inset shows the same model expressed in terms of the S-wave impedance.…”

Section: Seismic Datamentioning

confidence: 99%

“…A seismic survey for ore exploration was recently conducted in the Flin Flon mining camp, Canada (Malinowski et al, 2008;Malinowski et al, in preparation). High-resolution 2-D crooked-line profiles were acquired using 3-C digital sensors, thus making converted wave imaging feasible.…”

Section: Introductionmentioning

confidence: 97%

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Converted wave seismic imaging in the Flin Flon mining camp, Canada

Malinowski

White

2011

Journal of Applied Geophysics

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Section: Elastic Rock Properties and 2-d Forward Modelingmentioning

confidence: 89%

Section: Seismic Datamentioning

confidence: 99%

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Converted wave seismic imaging in the Flin Flon mining camp, Canada

Malinowski

White

2011

Journal of Applied Geophysics

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3D seismic imaging of volcanogenic massive sulfide deposits in the Flin Flon mining camp, Canada: Part 2 — Forward modeling

2012

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We applied seismic modeling for a detailed 3D geologic model of the Flin Flon mining camp (Canada) to address some imaging and interpretation issues related to a [Formula: see text] 3D survey acquired in the camp and described in a complementary paper (part 1). A 3D geologic volumetric model of the camp was created based on a compilation of geologic data constraints from drillholes, surface geologic mapping, interpretation of 2D seismic profiles, and 3D surface and grid geostatistical modeling techniques. The 3D modeling methodology was based on a hierarchical approach to account for the heterogeneous spatial distribution of geologic constraints. Elastic parameters were assigned within the model based on core sample measurements and correlation with the different lithologies. The phase-screen algorithm used for seismic modeling was validated against analytic and finite-difference solutions to ensure that it provided accurate amplitude-variation-with-offset behavior for dipping strata. Synthetic data were generated to form zero-offset (stack) volume and also a complete prestack data set using the geometry of the real 3D survey. We found that the ability to detect a clear signature of the volcanogenic massive sulfide with ore deposits is dependent on the mineralization type (pyrite versus pyrrhotite rich ore), especially when ore-host rock interaction is considered. In the presence of an increasing fraction of the host rhyolite rock within the model volume, the response from the lower impedance pyrrhotite ore is masked by that of the rhyolite. Migration tests showed that poststack migration effectively enhances noisy 3D DMO data and provides comparable results to more computationally expensive prestack time migration. Amplitude anomalies identified in the original 3D data, which were not predicted by our modeling, could represent potential exploration targets in an undeveloped part of the camp, assuming that our a priori earth model is sufficiently accurate.

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Interpretation of 2D seismic profiles in complex geological terrains: Examples from the Flin Flon mining camp, Canada

White

Malinowski

2012

GEOPHYSICS

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A methodology was demonstrated for the 3D interpretation of networks of 2D seismic profiles in conjunction with other 3D geological constraints. The methodology employs 3D migration of 2D seismic data as a means of directly correlating reflections with out-of-plane geology, followed by ray-trace modeling of interpreted 3D geological surfaces. The proposed interpretation workflow was demonstrated with examples taken from 2D seismic profiles that were recently acquired for VMS ore exploration within the Flin Flon mining camp, Canada. In each example, the utility of the method was demonstrated and the resulting inferences were validated by comparison with a true 3D seismic survey acquired over a subset of the same area.

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Seismic Exploration for VMS Deposits within the Paleoproterozoic Flin Flon Belt, Trans-Hudson Orogen, Canada

Cited by 4 publications

References 0 publications

Converted wave seismic imaging in the Flin Flon mining camp, Canada

Converted wave seismic imaging in the Flin Flon mining camp, Canada

3D seismic imaging of volcanogenic massive sulfide deposits in the Flin Flon mining camp, Canada: Part 2 — Forward modeling

Interpretation of 2D seismic profiles in complex geological terrains: Examples from the Flin Flon mining camp, Canada

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