KAT Exploration Inc (KATX)

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The fact that Mr Picket used Mr Wheeler as a reference at Vale may be most telling...

Title:Using stochastic borehole seismic velocity tomography and Bayesian simulation to estimate Ni, Cu and Co grades.

adsabs.harvard.edu/abs/2010EGUGA..1213289P

Authors Perozzi, Lorenzo; Gloaguen, Erwan; Rondenay, Stephane; Leite, André; McDowell, Glenn; Wheeler, Robert
Affiliation:
AA(Institut National de la Recherche Scientifique, INRS-Eau, Terre et Environnement, Université du Québec, Québec, Canada), AB(Institut National de la Recherche Scientifique, INRS-Eau, Terre et Environnement, Université du Québec, Québec, Canada), AC(Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology , Cambridge, United States), AD(Vale Inco, Toronto, Canada), AE(Vale Inco, Toronto, Canada), AF(Vale Inco, Toronto, Canada)

Indeed, this non-intrusive technique allows inferring the mechanical properties of the ground using travel times and amplitude analysis of the transmitted wavelet between two boreholes, hence provide additional information on the nature of the deposit. Commonly used crosshole seismic velocity tomography algorithms estimate 2D slowness models (inverse of velocity) in the plane between the boreholes using the measured direct wave travel times from the transmitter (located in one of the hole) to the receivers (located in the other hole). Furthermore, geophysical borehole logging can be used to constrain seismic tomography between drill holes. Finally, this project aims to estimate grade of economically worth mineral by integrating seismic tomography data with respectively drill core measured grades acquired by Vale Inco for one of their mine sites in operation.