Kimberley A. Jenner

B. Sc. Honours Thesis

A Study of Sulfide Mineralization in the Meguma Group Sediments Gold Brook, Colchester County, Nova Scotia.

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A preliminary study of representative drill core from the Gold Brook property (of Sulpetro Minerals Limited), Colchester County, Nova Scotia was undertaken, to describe the styles of strata-bound and vein-type mineralization hosted in metasediments of the Meguma Group.

Mineralization is distributed mainly within a calcareous quartz metawacke unit at the top of the Goldenville Formation and within immediately overlying graphitic slates of the Halifax Formation.

Sulfides occur as three styles of aggregates: stratiform, vein-fracture filling and fabric controlled. The mineralogy consists predominantly of pyrrhotite an pyrite with associated sphalerite and galena and traces of chalcopyrite and arsenopyrite.

High lead-zinc values within the calcareous quartz metawackes are associated with manganese. This enrichment is accounted for in calcite and spessartite garnets. Iron is concentrated within the black graphitic slates.

The data are compatible with a model suggesting an enrichment of metals during sedimentation, followed by remobilization of these metals during regional metamorphism and later precipitation into fractures and veinlets.

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Pages: 68
Supervisors: Marcos Zentilli