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A finite-difference modeling analysis of mode-converted scattering from massive sulfidedeposits, Bathurst mining camp, Canada
Geological Survey of Canada.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
GNS Science.
2012 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

We present elastic finite-difference modeling results over ageologically realistic 2D representation of the HalfmileLake volcanic-hosted massive sulfide deposit, NewBrunswick, Canada. The model is constrained bygeological information from surface mapping andboreholes whereas petrophysical properties are provided bywireline logging data acquired in two boreholesintersecting different parts of the deposit. We analyzed theP-P, P-S, S-P, and S-S responses of the Lower and Deepmineralized zones and assessed some compositional effectsby substituting massive sulfides with gabbro properties inthe model. Finite-difference modeling results predictcomplex scattering including P-P, P-S, S-P, and S-S wavesgenerally having strongest amplitudes in the stratigraphydown-dip direction. The P-S, S-P, and S-S scattered waves,if properly recorded on multi-component data, representuseful signal that could help the targeting of deep sulfidemineralization. Finite-difference simulations further revealphase-reversals on P-P wavefields scattered at the massivesulfide zones. The phase reversals are not observed forgabbro inclusions, suggesting that this signature could beused to discriminate gabbro units from sulfidemineralization. The FD simulation successfully reproducesmany events of the VSP data, in particular P-S and S-Sevents on the radial component and P-P and S-P events onthe vertical component.

Place, publisher, year, edition, pages
2012.
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-286429DOI: 10.1190/segam2012-0069.1OAI: oai:DiVA.org:uu-286429DiVA: diva2:921527
Conference
SEG Las Vegas 2012 Annual Meeting
Available from: 2016-04-20 Created: 2016-04-20 Last updated: 2016-06-29Bibliographically approved

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Publisher's full texthttp://library.seg.org/doi/abs/10.1190/segam2012-0069.1

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Malehmir, Alireza

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CiteExportLink to record
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