A REINTERPRETATION OF THE BATEMAN-BROOK-METAMORPHIC-SUITE, CAPE-BRETON HIGHLANDS, NOVA-SCOTIA, AS SHEARED, FAULT-BOUNDED BLOCKS OF OTHER UNITS

The Bateman Brook Metamorphic Suite, as previously defined, is the wes ternmost unit of the Bras d'Or terrane in the central Cape Breton High lands. It outcrops along the Eastern Highlands Shear Zone, the contact between the Bras d'Or terrane and the Aspy terrane to the northwest. The Bateman Brook unit has been reported to contain a wide range of li thologies, and contacts with adjacent units are mainly faulted. Re-exa mination of rocks from the Bateman Brook Metamorphic Suite shows it to consist of semipelitic to psammitic schist, banded mafic gneiss, and foliated, dioritic, mafic gneiss. Rocks exhibit two major shear fabric s, an early intensely foliated and lineated fabric indicative of shear at high metamorphic grade, and a later mylonitic fabric indicative of shear at lower grade. As a result of this study, it is recommended th at the name Bateman Brook Metamorphic Suite be abandoned. The southern part of the suite is re-assigned to the McMillan Flowage Formation of the Bras d'Or terrane. The central part is interpreted to include roc ks of both the Kathy Road Dioritic Suite and the McMillan Flowage Form ation. Most of the northern part is re-assigned to the Jumping Brook M etamorphic Suite of the Aspy terrane.