MULTIPLE BRECCIA EVENTS IN THE LOWER PART OF THE CARBONIFEROUS WINDSOR GROUP, NOVA-SCOTIA

Base metal occurrences in the Carboniferous Windsor Group are commonly associated with carbonate breccias of which three types are recognize d: one synsedimentary, one tectonic and one post-burial karstic. The s ynsedimentary type occurs in the Macumber Formation and in the so-call ed Pembroke siderite (Walton area); sedimentologic and diagenetic elem ents indicate rotational slides on a deep-water slope. The tectonic br eccia occurs along the top of the Macumber Formation and is a manifest ation of the Ainslie Detachment, a flat-lying extensional fault. Final ly, what is referred to as the Pembroke breccia consists of irregularl y distributed, post-burial, post-tectonic, post-mineralization, karsti c, solution-collapse breccia. The synsedimentary and tectonic breccias are either pre- or syn-ore, although, both have played a key role in localizing mineral deposition through enhanced permeability, as exempl ified by the Jubilee and Walton deposits.