GEOLOGY OF THE NANISIVIK DEPOSIT

The sulphide bodies pass through some major faults with little or no change in elevation and cut horizontally across the bedding in the dolomite. These facts imply that their emplacement was not stratigraphically controlled; that favorable horizons in the dolomite, evaporite beds and reef structures are all excluded as ore controls, and that the sulphides are not syngenetic with the dolomite but are post-faulting. It also appears, taking all the available information into consideration, that the sulphides have no direct relationship to brecciation, marmorization, or lithological changes within the Society Cliffs Formation.

Evidence indicates that sulphides were deposited under some pressure and at temperatures higher than those of meteoric water and hence, it may be concluded, under Victor Bay shale cover.

There is evidence, therefore, of two separate processes: the cavities being formed as horizontal caves by meteoric water at low temperature and pressure, and the minerals being deposited at elevated temperature and pressure.

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