A calibrated shaker was used to resuspend sediments from Hamilton Harbour, Ontario at different shear stresses. The floes formed by resuspension were irreversible and increased in size and number with increasing shear. Individual particle size was constant at about 0.1 pm for the different floes and independent of shear, but agglomeration size increased with shear. H-ion exchange as a function of sediment concentration fits a Langmuir type function well. Exchange of total Ba, Ca, Cd, Cr, Cu, Mg, Ni, Pb and Zn with H + were determined for the different shear regimes which covered quiescence to gale conditions. A simple lumped one intrinsic constant and fixed capacitance electrostatic model is used to fit the exchange data for each divalent metal.

The McConnell nickel deposit is an elliptical amphibolite-biotite quartz diorite pod within the Sudbury Metabreccia that surrounds the main mass of the Sudbury Igneous Complex. The geometry of the deposit is tabular with a strike length of approximately 152 m and depth of 610 m. Various magnetic surveys were conducted in this study area. A regional aeromagnetic survey was conducted by the Ontario Geological Survey. A more detailed ground magnetics survey and borehole magnetic survey are used in the interpretation of the character of the causative body. Five boreholes which intersect the deposit at 40 m, 105 m, 135 m, 210 m, and 250 m provide good lithological control of the deposit with depth. Eight other boreholes used in this study did not have logged lithology, but all 13 holes were logged with gamma ray, density, spectral gamma-gamma, IP, resistivity, SP, magnetic susceptibility, temperature, and three-component magnetic field probes. Only the measurements of magnetic susceptibility and three-component magnetic field measurements and their interpretation will be discussed in this paper. Three-component magnetic vector surveys show different signatures for boreholes that pass through a magnetic source body, and for holes that are adjacent to the source body. Using inverse models of the surface magnetic data, values of magnetic susceptibility and magnetic remanence direction and intensity for the various lithological units are estimated. Modelling of the subsurface data reveals fine structure within the ore body and may be used to estimate the direction and distance to the magnetic bodies.

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