Article,

Downhole seismic scattered and mode-converted waves from the Halfmile Lake massive sulfide orebody, New Brunswick

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SEG Technical Program Expanded Abstracts, 21 (1): 1464--1467 (2002)
DOI: 10.1190/1.1816940

Abstract

Multi-offset, multi-azimuth downhole seismic data were acquired at Halfmile Lake, New Brunswick, to image known massive sulfide lenses and investigate the potential for a steeply-dipping mineralized zone connecting them The. massive sulfide lenses, which have significantly higher impedances than host rocks, produce strong scattering. The downhole seismic data shows prominent scattered and mode-converted waves (P-P, P-S, S-S, and S-P) originating from the deposit. Such complex scattering from massive sulfide ore has not been observed previously in VSP data. Migration of P-P and S-S scattered wave modes from one offset VSP partly imaged the deepest lens. The scattered S-waves and mode-converted waves provide additional imaging capabilities which should be considered when applying downhole seismics to mining exploration.

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